SCHRITTMOTOR

UNITARY STATOR FOR A STEPPING MOTOR FOR WATCHES

Single-phase miniature stepping motor

A single-phase miniature stepping motor is proposed which contains a stator having two pole shoes (1 and 2) whose cylindrical surfaces (3 and 4) face one another. A two-pole rotor is arranged between the pole shoes (1 and 2), and a means for fixing the rotor is arranged between the stator and the rotor. According to the invention, the means for fixing the rotor is constructed as a ring (8) whose thickness is less than the thickness of the pole shoes (1 and 2) of the stator and whose width is variable depending on the angular coordinate of the stator. The present invention can be used most effectively in the clock industry, in the manufacture of electronic/mechanical wrist watches having hands. ...

ELEKTRISCH GESTEUERTE MECHANISCHE UHR

ELECTRO-MAGNETIC STEPPING MOTOR WITH TWO COUPLED ROTORS

ELEKTRISCHES NEBENUHRWERK.

Improvements relating to Electrically Operated Time Indicating Devices.

... 20,268. Aron, L. J., and Harrison, C. E. Sept. 12. Electric clocks.-Relates to a time-indicating device of the kind operated by alternating- current impulses, and in which one magnetic member is pivoted between the poles of a fixed member, polar extensions or horns which determine the direction of rotation being provided on one or both members. According to this invention, the horn C<1> on one or each of the poles of the fixed magnetic member C extends in a direction opposite to that of the required rotary movement of the armature F, while the horn F<1> on one or each of the poles of the armature extends in the direction of rotation. The spaces between the extensions C', F' when the parts are at rest are relatively large. In order that the armature may have definite positions of equilibrium, the air-gaps between each pair of polar extensions C', F' are graded from one or both ends as shown in Fig. 2; or, in a modification, Fig. 3, in which the positions of rest are not very definite, the ...

Improvements in or relating to electromagnetic secondary clocks

... 687,948. Clocks. TELEFONBAU UND NORMALZEIT GES. April 5, 1950 [Dec. 2, 1948; Dec. 2, 1948], No. 8559/50; Class 139 An electromagnetic secondary clock comprises an electromagnetic system having a stator and a co-operating substantially cylindrical rotor for driving a hand of the clock, the rotor being permanent magnet magnetized exclusively along its rim so as to have at least four poles of alternate polarities on its rim. The stator 14, Fig. 1, has two pole pieces 15, 16 which co-operate with the four poles of the armature 11 which is magnetized along its circumference and is mounted on an arbor 12. Current impulses pass in alternating directions through the winding 17 of the stator 14 to impart alternate north and south magnetism to the pole pieces 15, 16. The armature may be shaped as shown in Fig. 2 and have embossed poles 19. The rotor may be pressed from comminuted magnetizable material held together by a binder. The limbs of the stator may each have two pole pieces and the associated ...

METHOD FOR MAKING A TIMEPIECE STEPPING MOTOR

Electronic time keeping device

An electronic time keeping device has a step motor (4) including a rotor (11), a stator (8), and winding (10) provided in unitary fashion by means of motor case plates (6, 7). The hand (25) of the smallest unit of time (minutes hand) is mounted on the shaft (13) of the step motor (4) which is a 60 pole motor receiving one pulse per minute. Gear train (21, 22, 23, 24) driving the hour hand (26), and the electronic parts are accommodated in a depressed portion (7a) of the upper plate (7). The electronic parts are on a circuit board (15). Stator teeth (8a, b) are formed integrally with the plates (6, 7). A number of arrangements are described, and the hand on the rotor shaft may be a seconds hand. ...

ELECTRONIC TIME KEEPING DEVICE

Single-phase step micromotor

A single-phase step micromotor comprises a stator having a pair of pole pieces 1 and 2 facing each other by cylindrical surfaces 3 and 4 thereof. Interposed between the stator pole pieces 1 and 2 is a double-pole rotor 9, while arranged between the stator and rotor is a ferromagnetic ring 8 the thickness of which is less than that of the stator pole pieces 1 and 2. The inner diameter of the ring varies along the angular coordinate of the stator to provide a variable gap "a". The rotor poles align with an axis XX when no current is being applied to a winding 6. The invention can be applied to advantage in horology, such as for the manufacture of electronic/mechanical wristwatches with dial display. ...

SINGLE-PHASE STEP MICROMOTOR

Electromagnetic rotary step-by-step drive

... 853,085. Electric motors. LANDIS & GYR A.G. Dec. 3, 1958 [Dec. 10, 1957], No. 39009/58. Class 35. An electromagnetic rotary step-by-step drive includes two annular permanent magnet stators 13, 15 each having induced poles of alternating polarity over its entire face, the poles being separated by lines 16 which are tangential to a circle 17 concentric with a spindle 4 through their centres, the poles on one magnet being angularly displaced to a small extent relative to those on the other. Rotating coaxially with and between the permanent magnets is a soft iron rotor 1 having radially extending trapezoidal teeth 2. The rotor is attached to magnetic bush 3 on spindle 4 mounted in non- magnetic bearings 5 and 6. Bearing 5 in support 7 and bearing 6 in magnetic sleeve 9 connected to magnetic annular part 14 are mounted respectively in magnetic housing parts 8, 10. When coil 12 is energized the magnetized rotor moves so that its trapezoidal teeth coincide angularly with parts on stator 13 of ...

MOTOR ASSEMBLY

... 1513633 Electric watches SEIKO KOKI KK 10 May 1976 [14 May 1975 (3)] 19150/76 Heading G3T [Also in Division H2] In an electric watch, the bobbin 35 of coreless field coil L of the motor is mounted on portions 3a, 6a of two parallel support plates 3, 6 which pass through the bobbin, the shaft 8 of the rotor 15 and the gear train 17-19 driven thereby also being supported by the plates 3, 6. The plates are mounted in a casing 1 which also mounts part of the gear train, and the hands 22, 28, 33. The bobbin may be secured in various ways.

Transducer for an electronic timepiece

A transducer, e.g. a stepping motor, for an electronic timepiece comprises a permanently magnetised rotor (1) having at least two poles (N,S); a stator (2, 3) having an internal surface (20) radially inwardly of which the rotor (1) is disposed and from which it is spaced, the stator (2, 3) being made of an highly permeable magnetic material and being magnetically coupled to the rotor (1); and a coil (4) magnetically coupled to the stator (2, 3). In order to reduce power consumption it is arranged that 0.6 > Rr/Sr > 0.3, and 1.5 > Rt/St >/= 0.8 where Rr is the maximum distance of any point on the external surface of the rotor (1) from the axis (21) of the rotor (1), Sr is the minimum distance of any point on the internal surface (20) of the stator (2, 3) from the axis (21) of the rotor (1), and Rt and St are the axial thicknesses of the rotor (1) and stator (2, 3) respectively.

ELECTROMECHANICAL HOROLOGE WITH STEPPING MOTOR.

MICRO-MINIATURE STEPPING MOTOR

A micro-miniature stepping motor suitable for driving the gear works of an electronic watch wherein lowfrequency timing impulses derived from a high-frequency time base are applied to the stator coil of the motor to cause the rotor thereof to index ninety degrees in response to each impulse. The rotor includes a square rotor plate and a stator plate parallel thereto, a shaft secured to the center of the rotor plate extending through a central opening in the stator plate. Mounted on the underside of the rotor plate at the corners thereof are four permanent magnet blocks with their poles in mutual opposition to form a magnetic circuit between the rotor stator plates whose lines of flux bridge the air gap there-between. The stator plate has a generally square formation whereby the magnet blocks on the rotor, in the absence of a torqueproducing force, seek to orient themselves to a stable position of minimum reluctance. In this position, each block is proximate to a respective corner of the ...

Electrical Sekundäruhr

Electric secondary clock

Electrical slave clock

Electro chronometric silencer

Compteur chronométrique d'impulsions électriques.

Elektromagnetische Nebenuhr.

Verfahren zur elektrischen Steuerung von Nebenuhren durch eine Hauptuhr und elektrische Uhrenanlage zu dessen Ausführung.

Multipolar stepper motor e.g. for clock movement

The stepper motor has a permanent magnet rotor comprising a thin disc having N pairs of magnetic poles, and a magnetic stator circuit. The stator includes a coil winding around a ferromagnetic core, and two polar pieces each magnetically connected to one of the ends of the winding. Each polar piece has three toothed zones which are distributed around a central axis, with the end zones of each stator part overlapping each other.

ELECTROMECHANICAL TRANSDUCER FOR TIMEPIECE QUARTZ.

Elektromagnetischer Schrittantrieb

Moteur à impulsions

Schrittschaltmotor.

Schrittschaltmotor.

Schrittschaltmotor mit Rücklaufbremse.

Elektromagnetisches Laufwerk, insbesondere für Nebenuhrwerke

Elektromagnetisches Drehanker-Schrittwerk

Elektromagnetisches Laufwerk, inbesondere Nebenuhrwerk

Moteur électrique, pour pièce d'horlogerie

Pièce d'horlogerie électrique

Moteur pas à pas de petites dimensions destiné à être utilisé dans une pièce d'horlogerie

Micromoteur électrique pour mouvement d'horlogerie

Micromoteur électrique pour mouvement d'horlogerie

MOTEUR ELECTROMAGNETIQUE ROTATIF PAS A PAS.

Elektromagnetische Nebenuhr

Dust filter esp for textile waste - is intermittently blown back with large deformation of filter cloth

An apparatus for collecting material, esp. dust, conveyed by an airstream comprises an air line leading into a separation chamber, comprising an air outlet via a flexible filter; equipment automatically interrupts and re-starts the air flow through the separation chamber, while additional equipment connects the separation chamber to a vacuum source while the air flow is interrupted. Esp. used in the textile industry for final purification of air to remove harmful dust and other particles such as small threads. The principle of using a large deformation of the filter, by reversing the pressure applied to it, is utilised for ejecting the dust from the normal upstream side.

STEPPING MOTOR.

A PHASE STEP ENGINE.

CAST SOLID STATOR FOR ENGINE STEP BY STEP Of CLOCK INDUSTRY.

Bipolar stepping motor

Two pole shoes (10, 11) are arranged in the vicinity of a six-pole rotor (1) such that the air gap between each of the pole shoes and the rotor is in the form of a wedge along the circumference of the same. Each pole shoe grips the rotor over more than two but less than three pole pitches. Each pole shoe is integrally formed at one end of a stator part (6, 8), and the other end of the stator parts projects into the interior of a coil (4). In order to change the rotation direction of the stepping motor, the pole shoes can each be pivoted in a limited manner about an axis (7, 9) running parallel to the rotation axis of the rotor. This pivoting of the pole shoes results in the wedge-shaped air gaps tapering in the other direction, as a result of which the torque exerted on the rotor also changes and the rotor rotates in the opposite direction, in the same way as before pivoting. ...

Electric timepiece with a single-phase stepping motor

Stator, which is constructed as an integral unit, for a stepping motor

Electromagnetic motor

The rotor of the electromagnetic motor comprises a shaft (5) containing a cavity (5a) and a magnet (6) mounted in this cavity. The magnet has the shape of a parallelepipedal bar whose axis points along the line II-II'. It is magnetised along this axis. The shaft forms, together with the pinion (9) and the pivots (13 and 14), a one-piece construction. It is preferably made of plastic. The magnet, owing to its simple shape, is easily machined even from a material which is difficult to section such as samarium-cobalt. The shapes of the shaft and the magnet lend themselves particularly well to automatic mounting. ...

Single phase stepping motor, particularly for clocks

Supporting rotor bearings in a single-phase stepping motor

Single-phase minimum step-action motor

The minimum step-action motor contains a stator with two pole shoes (1) and (2) whose cylindrical surfaces (3) and (4) face one another. A two-pole rotor is located between the pole shoes (1) and (2). A ring (8) to hold the rotor is disposed between the stator and the rotor, its strength being less than the strength of the pole shoes (1) and (2) of the stator and its width differing according to the angular coordinate of the stator. ...

Electric motor coil, especially for timepiece, and method for its manufacture

The coil includes a core (2), a wire winding (1) around the core and a substrate (9) made of an insulating material carrying conductive connection tracks (7, 8) on which are fixed the ends (3, 4) of the wire of the winding (1). The substrate (9) has a shape corresponding to that of the face of the core to which it is applied, and is clamped between the core (2) and the winding (1). The method of manufacturing such a coil consists in first applying the substrate (9) to the core (2) and in then coiling the winding (1) around the assembly formed by the core and the substrate. ...

Electromagnetic motor with two directions of rotation

Electronic watch with micromotor

The watch comprises a stone (13) driven into the rotor bridge (11). This stone has a circular aperture (13') in which the cylindrical part (12') of the pivot (12) for the shaft of the rotor pivots. The aperture (13') terminates on the inside in a wide cone (15) serving as guide for the end of the pivot (12) during installation of the rotor bridge (11) carrying the stone (13), and does so even if the rotor is inclined through magnetic attraction between its magnet (5) and the stator (2, 2') of the micromotor. ...

PROCEEDED OF ORDERING Of a ROTATING ENGINE DISCONTINUOUS FOR CLOCK ELEMENT QUARTZ HAS.

Motor device for electronic watch

The shaft (6) of the rotor of this motor has, made in one piece with it, a plate (6c) serving as seat for the annular magnet (11) and for the pinion (12) of this rotor, by virtue of which these two elements are perfectly parallel to one another and perpendicular to the axis of the shaft. ...

Electric stepping micromotor for time-measuring devices

The stator (6) of the motor is produced from a non-ferromagnetic material, and there are arranged in its body bearings (10, 11) of the rotor, which is designed in the form of two discs (1, 2) with heteropolar magnet poles facing one another. Arranged in the stray field of the rotor magnets (4) on the periphery of the end faces of the stator winding are toothed rings (14, 15) which form an arrester for stopping the rotor in the event of a deenergised winding of the stator (6). This winding can represent a uniform coil having an oval, triangular or other non-round shape. ...

Electromagnetic motor with two directions of rotation

Permanent magnet step motor with a shiftable rotor

Electronic timekeeping device

The electronic timekeeping device has a stepping motor (4) with a rotor (11), a stator (8) and a winding (10), which are surrounded by a housing (6, 7) which has a depressed section (7a), and form a unit. The gearing (20) is arranged in the depressed section (7a), and the circuit card (15) with the electronic elements forms the cover for the depressed section. The device can thus be designed in a more compact and thinner fashion and be rendered less susceptible to shocks. ...

Electronic quartz watch

Ultraflat, small-size (lady's) electronic quartz watch with analog display of the time by hands driven with the aid of a wheelwork via a stepper motor of the electromagnetic type. The problem of saving space is solved by the fact that the pole pieces (7, 7'), of large surface area, of the stator of the motor are mounted against a thin element (8) near that face of the movement which is opposite the dial, so that they can pass near the centre of the movement or even overshoot this centre and leave a space for the wheelwork underneath them. The thin element serves as bearing at least for the rotor (11) of the motor. ...

A PHASE STEP ENGINE, IN PARTICULAR FOR CLOCKS.

A PHASE STEP ENGINE.

STEPPING MOTOR.

Motor device, in particular for timepiece

The device comprises a stepper motor and an electronic circuit suitable for delivering, with each step of the motor, a motive pulse, then for short-circuiting the coil of the motor so as to brake the rotor. With a view to reducing energy consumption, the electronic circuit is designed so that the short-circuiting of the coil begins only after an intermediate period during which no current flows in the coil.

Micromotor with discontinuous rotation

The stator (12) of the micromotor is connected to the two ends of a clevis-shaped core carrying the energising coil. It has an opening (14) for the rotor (15). This opening has two diametrically opposite flats (14a and 14b) which fix the rest position of the rotor. Two nicks in the outer edges of the rotor (12) create narrowings at symmetrical locations, on either side of the longitudinal axis of the stator (12). At the instant of the pulse, these narrowings saturate rapidly, thus forcing the magnetic flux to enter the rotor. ...

A PHASE STEP ENGINE.

Pulsed motor for horometrical apparatus

The rotor (1) has axes of magnetisation parallel to its axis and angularly offset. Pairs of upper (2a-3a) and lower stators define radial airgaps (a1-a2; b1-b2). The corresponding airgaps of the stator pairs are offset by a value corresponding to the offset of the axes of magnetisation. A motive coil (4) magnetises these stators alternately with opposite polarities. This arrangement ensures high magnetic coupling and stable operation. ...

Motor with discontinuous rotation for electric wristwatch

The motor is supported by the panel (22) which can for example be the plate of a watch movement. The bushing (24) has an inner face and an outer face, both of which are cylindrical and coaxial. It is engaged in a hole in the plate (22) and carries the bearings (20) of the rotor (5). The stator pole pieces (3 and 4) have inner faces of cylindrical shape and are positioned by pressing against the outside surface (23) of the bushing (24). The rest position of the rotor is determined by housings made in the coaxial cylindrically arced faces (3a and 4a) of the pole pieces (3 and 4). ...

A PHASE STEP ENGINE.

Electric micromotor intended to be used in a timepiece

The micromotor comprises two stator pieces of elongate shape (4, 5), carrying a coil former and situated facing one another, ends opposed. A rotor (1) is mounted between the opposing ends of the stator pieces. It rotates about an axis perpendicular to the longitudinal axis of the stator pieces. An outer casing (8) joins together flanges (4a, 5a) presented by the stator pieces at their outward pointing extremity. This outer tubular piece (8) is made of a material with high magnetic permeability and it provides effective shielding for the motor. The motor can be manufactured simply and inexpensively, with small dimensions, and it benefits, through the presence of the outer tubular piece of ferromagnetic material, from excellent shielding between its inner space and the outer ambient space. ...

STEPPING MOTOR.

Electromagnetic stepping motor for clock or watch movement

Electromagnetic stepping motor for clock or watch movement has simplified from of triangular shaped pole pieces ...

ELECTROMECHANICAL TRANSDUCER FOR TIMEPIECE QUARTZ.

Timepiece movement and timepiece

A timepiece movement capable of suppressing generation of malfunction of a hand is provided. The movement includes an indicator hand wheel which is provided so as to be rotatable and to which an indicator hand is mounted; an indicator hand stepping motor rotating and driving the indicator hand wheel in both directions; an hour wheel provided so as to be rotatable around a first rotation axis different from a rotation axis of the indicator hand wheel and having a first shaft portion which extends along the first rotation axis and on the outer peripheral surface of which there is provided a contact portion that the indicator hand can abut, with the distance of the contact portion from the first rotation axis varying in accordance with a position in the peripheral direction around the first rotation axis; and an hour hand stepping motor rotating and driving the hour wheel and provided separately from the indicator hand stepping motor.

STEP MOTOR DRIVE DEVICE AND CIRCUIT

An electronic watch with a two-coil stepper motor including: a magnetized rotor; a stator including: first and second stator magnetic-pole portions, which are formed so as to oppose to each other through the rotor; and a third stator magnetic-pole portion, which is formed between the first stator magnetic-pole portion and the second stator magnetic-pole portion so as to face the rotor; a coil A to be magnetically coupled to the first stator magnetic-pole portion and the third stator magnetic-pole portion; and a coil B to be magnetically coupled to the second stator magnetic-pole portion and the third stator magnetic-pole portion; and a high-speed drive pulse generation circuit configured to output a drive pulse for driving the rotor to the coil A or the coil B, and wherein the rotor is rotationally driven in increments of 360° due to a drive pulse train formed of the plurality of drive pulses. 1: A step motor drive device , comprising:a rotor magnetized into two poles or more in a radial direction of the rotor;a first stator magnetic-pole portion and a second stator magnetic-pole portion, which are formed so as to oppose to each other through the rotor,a third stator magnetic-pole portion, which is formed between the first stator magnetic-pole portion and the second stator magnetic-pole portion so as to face the rotor;a first coil to be magnetically coupled to the first stator magnetic-pole portion and the third stator magnetic-pole portion,a second coil to be magnetically coupled to the second stator magnetic-pole portion and the third stator magnetic-pole portion,a drive pulse generation circuit configured to output a drive pulse train composed of a plurality of drive pulses for driving the rotor to the first coil or the second coil,a detection pulse generation circuit configured to generate a detection pulse for detecting rotation of the rotor; anda rotation detection determination circuit configured to determine rotation or non-rotation of the rotor based on a ...

Electro-mechanical timepiece with stepper motor

내용 없음. No content.

Multipole stepping motor

FIELD: electrical engineering. SUBSTANCE: multipole stepping motor has magnetized rotor with alternating N and S poles distributed along its periphery magnetized in parallel to its axis. They are positioned on one of its side opposite to pole pieces. Each of pole pieces has concave internal edge provided with teeth separated with teeth of intermediate pole piece. Core which carries coil connects pole pieces with coil. Pitch α s of teeth of pole pieces differs from pitch α r of poles of rotors. EFFECT: enhanced accuracy and reliability. 5 cl, 11 dwg 49$13800с ПЧ Го РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) (51) МПК ВИ” 2008 757. 13) Сл Н 02 К 37/00 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 4614818/07, 24.08.1989 (30) Приоритет: СН/25.08.88/3162 (30) Приоритет: 25.08.1988 СН 88 3162 (46) Дата публикации: 28.02.1994 (71) Заявитель: Матгиас Шолер (СН) (72) Изобретатель: Май Ксуан ТУ[СН], Мишель Шваб[СН] (73) Патентообладатель: Матгиас Шолер (СН) (54) МНОГОПОЛЮСНЫЙ ШАГОВЫЙ ДВИГАТЕЛЬ (57) Реферат: Использование: В МНОГОПОЛЮСНЫХ шаговых двигателях с большим числом пар ПОЛЮСОВ. Сущность изобретения: многополюсный ротор намагничен, имеет на одной из своих сторон, расположенной против полюсных наконечников, чередующиеся полюса М и $, распределенные вдоль его периферии, намагниченные параллельно его оси. Каждый из полюсных наконечников имеет вогнутую внутреннюю кромку, снабженную зубцами, разделенными зубцами промежуточного наконечника. Сердечник, на который установлена катушка, связывает магнитно полюсные наконечники с катушкой. Шаг «о. зубцов полюсных наконечников отличен от шага о, полюсов ротора. Это позволяет повысить точность и надежность. 4 з. п. ф-лы, 11 ил. 2008757 С1 КО 49$13800с ПЧ Го КУЗЗАМ АСЕМСУ ГОК РАТЕМТ$ АМО ТКАОЕМАКК$ (19) 13) ВИ” 2008 757. (51) п. С1.5 Н 02 К 37/00 СЛ 12) АВЗТКАСТ ОЕ 1МУЕМТОМ (21), (22) АррИсаНоп: 4614818107, 24.08.1989 (30) Рпошу: СН/25.08.88/3162 (30) Рпогйу: 25.08.1988 СН 88 3162 (46) Рае оГ ...

Electronic wrist watch

Peak detector

1441928 Electronic watches RCA CORPORATION 15 June 1973 [18 Dec 1972] 58282/72 Heading G3T [Also in Divisions H2J and H3T] A circuit producing a pulse at signal peaks for pulsing the motor of a timepiece comprises an inverter having a negative feedback path operative during the peaks but otherwise normally inoperative. In the complementary inverter circuit shown the dimensions of the transistors P 1 and N 1 are so chosen that points B and C are almost at the supply potential V DD . A pulse train VA, Fig. 9 , such as may be derived from the balance wheel of a watch, causes the capacitor 16 to charge through diode 14 during the first slightly negative portion of the wave without much change in output voltage. During negative going portions of the wave the diode charges the capacitor to the peak value of the input signal so that positive going portions switch the state of the inverter and cut-off the diode. During the positive portion the capacitor discharges slightly so that during the next negative peak the condition of the circuit reverses again, as at 94, producing an output pulse, the width of which depends upon the amount of charge lost from capacitor C between the two positive pulses. To avoid missing a small peak following a large one the capacitor voltage may be limited by a diode to the supply voltage Fig. 12 (not shown). An inverter P2, N 2 provides the output wave VD. In order to charge the capacitor 16 more quickly where transistors P and N are small the diode 14 may be replaced by an emitter-follower transistor formed by lateral CMOS construction techniques, Fig. 5 (not shown). Alternatively a source follower may be used and driven from an extra amplifier stage the source to drain spurious diode formed on the substrate being rendered ineffective by following the source follower by an emitter follower Fig. 13 (not shown). In Figs. 18 and 19 (not shown) the feedback path is provided by the source drain path of a field effect transistor controlled by an ...

Patent JPS60501933A

(57)【要約】本公報は電子出願前の出願データであるため要約のデータは記録されません。

Patent JPS5760862B2

In an electronic timepiece motor, a one-piece stator of magnetic material having a hole therethrough bounded by a circumferential sidewall and defining a pair of stator portions connected by narrow bridges having small cross sections. The narrow bridges define a magnetic circuit of high magnetic resistance between the stator portions. A non-magnetic reinforcing ring is disposed within the hole through the one-piece stator and has an outer diameter effective to insure a snug fit of the reinforcing ring with the circumferential sidewall defining the hole through the stator. The reinforcing ring imparts stiffness to the one-piece stator to prevent deformation of the bridges and the hole. The reinforcing ring has a peripheral reinforcing flange extending outwardly and with the flange bearing against the one-piece stator adjacent the hole therethrough for imparting additional stiffness to the one-piece stator. A rotor is mounted for rotation within the hole through the one-piece stator and within the reinforcing ring.

Multipolar stepping motor

내용 없음. No content.

Patent FR2210768A1

Stepping motor for electric timepiece - has easy-to-assemble stator comprising two parts held together by suitable devices

MOTEUR PAS A PAS POUR HORLOGE ELECTRIQUE. IL COMPORTE UN STATOR EN UNE SEULE PIECE DANS LEQUEL LA BOBINE PEUT ETRE MONTEE FACILEMENT. LA CULASSE 2 EST EN DEUX PARTIES. ELLE COMPORTE UNE BRANCHE 21 PLACEE SUR LE STATOR COMME PREMIERE PARTIE ET, COMME DEUXIEME PARTIE, UN SUPPORT DE BOBINE A BRAS DE SUPPORT 24. LA BOBINE DEPASSE DU BRAS DE SUPPORT LONGITUDINALEMENT ET PEUT ETRE PLACEE SUR LA BRANCHE DE CULASSE PAR SA PARTIE QUI DEPASSE. CETTE OPERATION FERME LE CIRCUIT MAGNETIQUE PAR LE SUPPORT. APPLICATIONS: NOTAMMENT AUX HORLOGES ELECTRIQUES.

Patent FR2465353B1

Electric step micromotor for watches - has non ferromagnetic stator and rotor made from two discs having facing alternating magnetic poles

The motor comprises a rotor rotating in bearings and made as two discs. Opposite alternating magnetic poles have their field axially directed to face one another. A stator has a control winding placed between the rotor discs and a locking device for stopping the rotor in specific angular positions w.r.t. deenergised stator. The stator is made of a non-ferromagnetic material and the locking device is provided with a gear wheel arranged in the stray or scattering field of the rotor magnets near the butt end of the stator winding. This permits reduction of influence of inaccuracies in assembly upon the motor torque, localization of the magnetic flux within the motor volume and decrease of effects of external magnetic fields upon the operation of the micrometer. The stator winding is made as a series of small circular coils, or as a single coil whose shape is oval or triangular.

TRANSDUCER FOR AN ELECTRONIC WATCHMAKING MOVEMENT

Patent FR2238179A1

A step motor particularly suited for use in electronic timepieces wherein the induced current generated by the stepping of the rotor is utilized to minimize the power consumption thereof. The step motor includes a permanent magnet rotor adapted to be stepped through a specific angle, at least two stator poles surrounding same, and an electromagnetic core coupled to the stator poles for providing at least first and second magnetic orientation to said stator poles in order to step said rotor through the specific angle. Coupled to the electromagnetic core is a circuit for applying driving pulses to the stator pole to effect said orientations thereof, and a second circuit coupled to said first mentioned circuit for terminating each drive pulse applied to said electromagnetic core at a time coincident with completion of the stepping of the rotor through the specific angle.

TWO-WAY ELECTROMAGNETIC MOTOR

L'INVENTION CONCERNE UN MOTEUR ELECTROMAGNETIQUE A DEUX SENS DE ROTATION. L'ARMATURE 1 DU STATOR A LA FORME D'UN TRAPEZE ISOCELE DONT LA BASE EST INTERROMPUE EN 2A ET PRESENTE TROIS EPANOUISSEMENTS POLAIRES 1A, 1B ET 1C. LE ROTOR COMPREND UN AIMANT PERMANENT 4. LE STATOR COMPORTE DEUX BOBINES 5 ET 6 DONT L'UNE EST DISPOSEE ENTRE LES EPANOUISSEMENTS POLAIRES 1A ET 1C ET L'AUTRE ENTRE CE DERNIER ET L'EPANOUISSEMENT POLAIRE 1B. LORSQUE LES BOBINES 5 ET 6 SONT PARCOURUES PAR DES COURANTS, ELLES SOUMETTENT LE ROTOR A DES CHAMPS MAGNETIQUES DONT LES DIRECTIONS SONT OBLIQUES ET SYMETRIQUES PAR RAPPORT A UN DIAMETRE DU ROTOR. LE SENS DES COURANTS DETERMINE LE SENS DES CHAMPS.

Miniature synchronous or stepper motor - with low power demand and suitable for mass production has ferrite rotor core

Motors of this type are typically used for driving battery operated clocks. The motor is contained in a casing which carries end flanges holding steel pin bearings which run in blind holes (4, 4') in the ends of the motor shaft. The shaft is a die casting formed around the ferrite rotor core and includes a driving sprocket at one end. Metal disc on the rotor serve as mechanical balancing planes. The stator windings are contained in an accurately cast assembly which also has centering rings to ensure correct positioning relative to the rotor. The electrical connections enter through one ring. A high permeability strip surrounds the windings and closes the magnetic circuit. Notches cut at each end of this strip, and equal in number to the rotor poles, are accurately placed relative to the windings to ensure correct step position.

ELECTRIC STEPPER MOTOR, PARTICULARLY FOR WATCHMAKING DEVICES

Patent FR2380660B1

A single phase stepping motor, particularly for clocks, with a rotor having several pole teeth and a stator, the latter being made of two stator parts connected with one another via a bridge part, the latter carrying the excitation winding, of which each stator part on its free end has an equal or smaller number (in comparison to the rotor pole number) of stator pole teeth as well as a passage opening for the rotor shaft, the stator pole teeth being directed towards the face sides of the rotor. Each rotor pole tooth comprises a main pole and an auxiliary pole extending in the direction of rotation formed on the main pole, and between the stator pole teeth, a permanent magnetic circuit is provided, by means of which circuit the rest position of the rotor is determined during the unexcited stator condition.

Improvements made to synchronous motors, in particular those for electric clocks

Electric receiver pendulum

ELECTROMECHANICAL TRANSDUCER HAVING TWO PERMANENT MAGNET ROTORS

Transducteur, notamment moteur d'entraînement horloger, comprenant un stator (2) formé de deux parties statoriques (16 et 26) et de trois noyaux (18, 19, 20) reliant respectivement trois pôles magnétiques (28, 29, 30), définis par la première partie statorique (16), à la deuxième partie statorique (26) servant à fermer les chemins magnétiques du transducteur. Les bobines 22 et 24 servent à l'alimentation du transducteur pour entraîner les deux rotors (4 et 6). La bobine (23) est reliée à des moyens de détection (72) servant à la détection de la rotation de l'un ou l'autre des deux rotors (4 et 6), et en particulier à la détection du passage par zéro de la tension induite dans la bobine (23). La détection du passage par zéro de la tension induite sert à fournir des signaux d'entrée aux moyens d'alimentation (70) pour commander l'entraînement des rotors dans un mode de fonctionnement rapide ou continu, que ce soit dans un sens de rotation avant ou arrière. Transducer, in particular clockwork drive motor, comprising a stator (2) formed from two stator parts (16 and 26) and three cores (18, 19, 20) respectively connecting three magnetic poles (28, 29, 30), defined by the first stator part (16), to the second stator part (26) serving to close the magnetic paths of the transducer. The coils 22 and 24 are used to supply the transducer to drive the two rotors (4 and 6). The coil (23) is connected to detection means (72) serving to detect the rotation of one or other of the two rotors (4 and 6), and in particular to detect the zero crossing of the voltage induced in the coil (23). The detection of the zero crossing of the induced voltage is used to provide input signals to the supply means (70) to control the driving of the rotors in a fast or continuous mode of operation, either in one direction of rotation. front or rear.

Advanced electric rotating machine

Patent FR2450527B1

A single phase bipolar stepping motor is described wherein the rotor is capable of bidirectional rotation. The rotor is so dimensioned that a combination of its moment of inertia J, its volume V and the number of pole pairs p satisfy the relation J/(Vxp1,4)>/=5x10-3 kg/m. Such a rotor will reliably step in the sense opposite to the preferred sense when the motor winding receives a first pulse of short duration followed by a second pulse of longer duration the polarity of which is inverted relative to that of the first pulse. The invention may find application to timepieces having hours and minutes hands.

Patent FR2149673A5

STEPPING MOTOR AND QUARTZ CLOCK HAVING SUCH A MOTOR

MOTEUR PAS A PAS. LE MOTEUR PAS A PAS SELON LA PRESENTE INVENTION COMPREND UN STATOR 1 QUE L'ON REALISE EN COUDANT UNE BARRE DE FORTE PERMEABILITE MAGNETIQUE DE MANIERE QU'ELLE PRESENTE LA FORME D'UN U DONT UNE DES BRANCHES EST RECTILIGNE, UN ENROULEMENT 2 DISPOSE SUR LADITE BRANCHE RECTILIGNE DU STATOR, ET UN ROTOR 6 DISPOSE ENTRE LA BRANCHE RECTILIGNE ET L'AUTRE BRANCHE DU STATOR, L'AUTRE BRANCHE ETANT COURBEE DE MANIERE QUE LA PARTIE LA PLUS PROCHE DU ROTOR DE CETTE BRANCHE NE SE TROUVE PAS SUR UNE DROITE PERPENDICULAIRE A LA BRANCHE RECTILIGNE ET PASSANT PAR L'AXE DU ROTOR, LA DISTANCE MINIMALE ENTRE LA BRANCHE RECTILIGNE DUDIT STATOR ET LE ROTOR ETANT PLUS GRANDE QUE LA DISTANCE MINIMALE ENTRE LA BRANCHE COURBEE ET LE ROTOR. STEP-BY-STEP ENGINE. THE STEP-BY-STEP MOTOR ACCORDING TO THE PRESENT INVENTION INCLUDES A STATOR 1 WHICH IS MADE BY BENDING A BAR OF HIGH MAGNETIC PERMEABILITY SO THAT IT PRESENTS THE SHAPE OF A U OF WHICH ONE OF THE BRANCHES IS RECTILINE, A WINDING 2 ARRANGES ON THE SAID STRAIGHT BRANCH OF THE STATOR, AND A ROTOR 6 IS PLACED BETWEEN THE STRAIGHT BRANCH AND THE OTHER BRANCH OF THE STATOR, THE OTHER BRANCH BEING CURVED SO THAT THE NEAREST PART OF THE ROTOR OF THIS BRANCH IS NOT LOCATED ON A PERPENDICULAR RIGHT AT THE STRAIGHT-LINE LEG AND PASSING THROUGH THE ROTOR AXLE, THE MINIMUM DISTANCE BETWEEN THE STRAIGHT-LINE LEG OF THE SAID STATOR AND THE ROTOR IS GREATER THAN THE MINIMUM DISTANCE BETWEEN THE CURVED LEG AND THE ROTOR.

MINIATURE STEP-BY-STEP MOTOR FOR WATCH MOVEMENT

LA PRESENTE INVENTION CONCERNE UN MOTEUR PAS-A-PAS 10 MINIATURE POUR MOUVEMENT DE MONTRE COMPRENANT UN ROTOR 12 ET UN STATOR 11 PERCE D'UNE OUVERTURE CIRCULAIRE DANS LAQUELLE EST LOGE LE ROTOR. UNE BAGUE DE RENFORT 18 ENTOURE CONCENTRIQUEMENT LE ROTOR ET EST CHASSEE DANS L'OUVERTURE CIRCULAIRE DU STATOR. CETTE BAGUE 18 COMPORTE UNE PARTIE CYLINDRIQUE CREUSE 19 ET UNE PARTIE ANNULAIRE 20 QUI FERME AU MOINS PARTIELLEMENT LA PIECE TUBULAIRE QUI CONSTITUE LA BAGUE 18. UNE OUVERTURE CENTRALE DANS LA PARTIE ANNULAIRE 20 PERMET DE LOGER LE PALIER 16 DE L'AXE DU ROTOR. CETTE BAGUE ASSURE UNE DOUBLE FONCTION: RIGIDIFIER LE STATOR ET PIVOTER LE ROTOR. THE PRESENT INVENTION CONCERNS A MINIATURE STEP-BY-STEP MOTOR 10 FOR WATCH MOVEMENT INCLUDING A ROTOR 12 AND A STATOR 11 WITH A CIRCULAR OPENING IN WHICH THE ROTOR IS LOCKED. A REINFORCEMENT RING 18 CONCENTRICALLY SURROUNDS THE ROTOR AND IS DRIED INTO THE CIRCULAR OPENING OF THE STATOR. THIS RING 18 INCLUDES A HOLLOW CYLINDRICAL PART 19 AND AN ANNULAR PART 20 WHICH AT LEAST PARTLY CLOSES THE TUBULAR PART WHICH CONSTITUTES THE RING 18. A CENTRAL OPENING IN THE ANNULAR PART 20 ALLOWS THE BEARING 16 OF THE ROTOR AXIS to be accommodated. THIS RING PROVIDES A DUAL FUNCTION: RIGIDIFYING THE STATOR AND PIVOTING THE ROTOR.

PERFECTED STEP MOTOR

Patent FR2401543B3

A single phase stepping motor, particularly for clocks, having a disc-like axially magnetized rotor with a number of rotor poles and a stator, which stator is made of at least two stator parts connected with one another via a bridge part carrying the excitation winding. Each stator part on its free end has a smaller number (in comparison to the number of rotor poles) of stator poles, the latter being directed toward the face side of the rotor. In the rest condition of the rotor, a rotor pole with its main part is disposed in the range of a stator pole and with an edge part in the range of the following stator pole.

Electric timepiece

1498373 Electric clocks SEIKO KOKI KK 20 April 1976 [23 April 1975] 15935/76 Heading G3T In a battery clock with a case 1 having at least one battery compartment A 1 , A 2 , a second compartment B houses an electro-mechanical transducer, a circuit for driving the transducer, and a gear mechanism coupling the transducer to hands or other time indicators, a portion of the gear mechanism being supported by and passing through a wall of the second compartment. As described, each of two batteries E is detachably held in its respective compartment by contacts (3, 4) Fig. 1 (not shown). The transducer is a stepping motor comprising an air-cored coil L and a rotor 16 which is magnetically coupled to a second rotor 17 as in Specification 1496644. The rotor 17 drives a gear train and seconds, minute, and hour hands 27, 35, 39 as the coil receives pulses from an oscillator 5 and divider 6 mounted on a board 7. The moving parts are supported by plates 9, 11 and by case wall 1b. A knob 40 and pinion 41a are provided for setting, slip being permitted by a spring 32 which couples a wheel 33 to minutes arbor 26.

STATOR MADE AS A ONE-PIECE STEP MOTOR UNIT

A material which consists of two firmly connected layers (13, 14) of different magnetic permeability is provided as the original material. In this case, a first layer (13), which consists of virtually non-magnetic material and is integral, functions as a carrier board for the second layer (14) which consists of magnetic material. The latter is separated by gaps (5, 6) in the region of the rotor opening, as a result of which two stator halves (3, 4) are produced which are magnetically separated from one another. This stator construction obviates adjustment of the two stator halves (3, 4) and, in addition, highly cost-effective production of the stator is possible.

STEP-BY-STEP MICROMOTOR

A micro stepping motor for use in compact electronic watches comprises a magnetic core, a coil winding wound on the magnetic core, and a one-piece stator connected to the magnetic core to define therewith a closed magnetic flux path. The stator has a necked portion defining a region of reduced cross-sectional area along its length, and a hole extends through the stator at the center of the necked portion. A rotor having at least one pair of magnetic poles is rotatably disposed within the stator hole with an air gap therebetween. The rotor rest positions are determined by either a pair of protrusions extending into the air gap at diametrically opposed sites about the stator hole, or a pair of recesses opening into the air gap at diametrically opposed sites about the stator hole.

Electromagnetic mechanism, in particular auxiliary clockwork

Patent FR2119796A5

MOTOR DEVICE, ESPECIALLY FOR WATCHMAKING

Dispositif moteur, notamment pour l'horlogerie, composé, d'une part d'un moteur pas à pas 4 dont le stator comporte une bobine à un seul enroulement 5 et dont le rotor est formé d'un aimant permanent 9 et, d'autre part, d'un circuit électronique de commande 1, 2, 3, 18 apte à délivrer au moteur des impulsions de courant. Le moteur comprend en outre des moyens de positionnement précis de son rotor 11 qui sont actifs en l'absence desdites impulsions. Le circuit électronique de commande 1, 2, 3, 18 est agencé de manière que les impulsions soient délivrées par paires et de polarités opposées dans chaque paire, l'ordre de succession des polarités dans une paire déterminant le sens de rotation du rotor. Motor device, in particular for watchmaking, composed, on the one hand, of a stepping motor 4 whose stator comprises a single-winding coil 5 and whose rotor is formed of a permanent magnet 9 and, of on the other hand, an electronic control circuit 1, 2, 3, 18 capable of delivering current pulses to the motor. The motor further comprises means for precise positioning of its rotor 11 which are active in the absence of said pulses. The electronic control circuit 1, 2, 3, 18 is arranged so that the pulses are delivered in pairs and of opposite polarities in each pair, the order of succession of the polarities in a pair determining the direction of rotation of the rotor.

SINGLE-PHASE STEPPER MOTOR, ESPECIALLY FOR WATCHES

L'invention a trait à un moteur pas à pas monophasé. Chaque pôle auxiliaire du rotor d'un tel moteur se compose d'un prolongement s'étendant dans le sens circonférentiel dans la région marginale du rotor et le circuit magnétique permanent se compose d'au moins un aimant permanent, situé extérieurement à la circonférence du rotor, son axe polaire étant tangent au rotor. Une partie des lignes de champ magnétique se rejoignent dans la zone marginale périphérique d'un pôle principal et d'un pôle auxiliaire rotoriques. Application : miniaturisation de moteurs pour montres électriques.

Single phase stepping motor for watches - has rotor of magnetically soft material with high coercive force, with tooth-shaped main and auxiliary poles

The motor has a multipole rotor and a stator consisting of two parts joined by a bridging element carrying the excitation winding. Each part changes at its free end into a number of poles equal to or smaller than that of rotor poles, pointing towards rotor periphery. The rotor (1) is made of magnetically soft material with high coercive force, and each rotor pole is tooth shaped, with a main pole (11) and a formed on it auxiliary pole (12), facing the direction of rotation. A permanent magnet circuit (8) defines the rotor (1) rest position when the stator (2) is not energised.

Patent FR2427727B1

A transducer, e.g. a stepping motor, for an electronic timepiece comprises a permanently magnetised rotor (1) having at least two poles (N,S); a stator (2, 3) having an internal surface (20) radially inwardly of which the rotor (1) is disposed and from which it is spaced, the stator (2, 3) being made of an highly permeable magnetic material and being magnetically coupled to the rotor (1); and a coil (4) magnetically coupled to the stator (2, 3). In order to reduce power consumption it is arranged that 0.6 > Rr/Sr > 0.3, and 1.5 > Rt/St >/= 0.8 where Rr is the maximum distance of any point on the external surface of the rotor (1) from the axis (21) of the rotor (1), Sr is the minimum distance of any point on the internal surface (20) of the stator (2, 3) from the axis (21) of the rotor (1), and Rt and St are the axial thicknesses of the rotor (1) and stator (2, 3) respectively.

MOTOR FOR ELECTRONIC WATCH

A transducer, e.g. a stepping motor, for an electronic timepiece comprises a permanently magnetised rotor (1) having at least two poles (N,S); a stator (2, 3) having an internal surface (20) radially inwardly of which the rotor (1) is disposed and from which it is spaced, the stator (2, 3) being made of an highly permeable magnetic material and being magnetically coupled to the rotor (1); and a coil (4) magnetically coupled to the stator (2, 3). In order to reduce power consumption it is arranged that 0.6 > Rr/Sr > 0.3, and 1.5 > Rt/St >/= 0.8 where Rr is the maximum distance of any point on the external surface of the rotor (1) from the axis (21) of the rotor (1), Sr is the minimum distance of any point on the internal surface (20) of the stator (2, 3) from the axis (21) of the rotor (1), and Rt and St are the axial thicknesses of the rotor (1) and stator (2, 3) respectively.

ELECTROMECHANICAL TRANSDUCER HAVING TWO PERMANENT MAGNET ROTORS

Patent FR2146527A5

An electric motor consisting of a stator and of an axially magnetized rotor disk is provided with a statoric winding in the form of an insulating wafer carrying an electric circuit formed by way of electro-deposition, to which are fed pulses of alternate polarities causing said motor to rotate step by step. Such a motor can exhibit minute dimensions of the order of a few tens of an inch, and thus can be used for driving the movement of a watch or the like.

TWO-WAY ELECTROMAGNETIC MOTOR

Electromagnetic advancement mechanism, in particular secondary clock mechanism

Wrist-watch miniature stepping motor - has minimal drain current and extended coil carrying pole pieces

The motor is designed to reduce the current drain on the battery. The rotor (A) is a small circular or semicircular permanent magnet of a Samurium or Platinum Cobalt material having a high flux density. The stator (ST1, ST2) consists of two polar arcs extended as coil arms (B) having windings which have a low overall thickness whilst maintaining the required number of ampere - turns, the ratio of their length being equal or greater than 4:1. The air gap is comparatively large and the arcs cover most of the circle described by the motor. Each arc has an oscillation damping thin high conductivity metal sleeve the whole stator having a two part soft iron yoke and screening shield.

DRIVING COIL ASSEMBLY, METHOD FOR MANUFACTURING SUCH AN ASSEMBLY, AND ELECTROMAGNETIC MICROMOTOR EQUIPPED WITH SAME.

EXCITATION COIL ASSEMBLY, METHOD FOR MANUFACTURING SUCH ASSEMBLY, AND ELECTROMAGNETIC MICROMOTOR EQUIPPED WITH THE SAME

L'invention concerne un ensemble de bobines d'excitation, ainsi qu'un procédé de fabrication de cet ensemble et un micromoteur électromagnétique équipé de celui-ci. Cet ensemble de bobines d'excitation, qui comporte un élément support plan (30) formé par un substrat semi-conducteur, et au moins une bobine plane (BI) réalisée sur une première couche (CI) au voisinage d'une face (F1) du substrat, est caractérisé en ce qu'il comprend au moins une deuxième bobine plane (BS) réalisée au voisinage de la face (F1) du substrat sur une deuxième couche (CS) superposée à la première (CI), ces couches de bobine (s) (CI, CS) formant un ensemble monolithique et intégré de plusieurs couches adjacentes respectivement supérieure et inférieure dans un même substrat. Cet ensemble s'applique de préférence à un micromoteur électromagnétique polyphasé destiné à fonctionner comme moteur pas à pas, à rotation continu ou bidirectionnel. The invention relates to an assembly of excitation coils, as well as to a method of manufacturing this assembly and to an electromagnetic micromotor equipped with the same. This set of excitation coils, which comprises a planar support element (30) formed by a semiconductor substrate, and at least one planar coil (BI) produced on a first layer (CI) in the vicinity of a face (F1 ) of the substrate, is characterized in that it comprises at least a second planar coil (BS) produced in the vicinity of the face (F1) of the substrate on a second layer (CS) superimposed on the first (CI), these layers of coil (s) (CI, CS) forming a monolithic and integrated assembly of several adjacent upper and lower layers, respectively, in the same substrate. This assembly is preferably applied to a polyphase electromagnetic micromotor intended to operate as a stepping motor, with continuous rotation or bidirectional.

Patent FR2210768B1

ATTACHING THE MOTOR ROTOR TO AN ELECTRIC MOVEMENT OF A WATCH

ELECTROMECHANICAL TRANSDUCER HAVING TWO ROTORS

DC step motor assembly for electronic clock - has rotor control windings powered from time base circuits with compensation for battery voltage variation

Rotors for two coupled motors are made from bipolar magnets of high quality coercivity material. They are fixed to a common shaft with an angular shift of 90 degs. Each magnet is positioned between the pole pieces of half stators which are excited by two windings in series. The stators are formed from thin laminations of soft iron or from an iron based powder material to provide high permeability. Periodic current pulses are applied to the control windings for the rotors. These are provided from a time base and frequency divider with an amplifier and wave shaping circuits. Compensation is provided for voltage variation of the batteries enabling the step motors to indicate time of day.

Patent FR2263632A1

A micro stepping motor for use in compact electronic watches comprises a magnetic core, a coil winding wound on the magnetic core, and a one-piece stator connected to the magnetic core to define therewith a closed magnetic flux path. The stator has a necked portion defining a region of reduced cross-sectional area along its length, and a hole extends through the stator at the center of the necked portion. A rotor having at least one pair of magnetic poles is rotatably disposed within the stator hole with an air gap therebetween. The rotor rest positions are determined by either a pair of protrusions extending into the air gap at diametrically opposed sites about the stator hole, or a pair of recesses opening into the air gap at diametrically opposed sites about the stator hole.

SINGLE-PHASE STEP MOTOR, WITH MAIN AND AUXILIARY ROTORIC POLES AND WITH MAGNETIC CIRCUIT BETWEEN THE STATORIC POLAR TEETH

A single phase stepping motor, particularly for clocks, with a rotor having several pole teeth and a stator, the latter being made of two stator parts connected with one another via a bridge part, the latter carrying the excitation winding, of which each stator part on its free end has an equal or smaller number (in comparison to the rotor pole number) of stator pole teeth as well as a passage opening for the rotor shaft, the stator pole teeth being directed towards the face sides of the rotor. Each rotor pole tooth comprises a main pole and an auxiliary pole extending in the direction of rotation formed on the main pole, and between the stator pole teeth, a permanent magnetic circuit is provided, by means of which circuit the rest position of the rotor is determined during the unexcited stator condition.

Patent FR2382127B3

MOVEMENT FOR TIME COUNTER

Motor-driven movement for timepieces wherein stator block core is formed in ring-shape with a magnetic material of a rounded bar, magnetic poles formed at both core ends are disposed as directed radially inward of the core and rotary shaft of minute hand wheel of output gear train meshing with a rotor disposed between the poles is radially displaced from the center of the core to the side opposite the magnetic poles, whereby internal space of the ring-shaped core having a coil wound thereon is efficiently utilized for arranging all internal components substantially within dimensions of the coil and minimizing the entire size of the movement.

ELECTROMECHANICAL TRANSDUCER WITH PERMANENT MULTIPOLAR MAGNETS

Le transducteur électromécanique comprend un stator 4 formé de trois parties 6, 8 et 18 présentant chacune des merlons ou dents 52, 54 et 60 superposés à un aimant multipolaire 34 du rotor 30. Les trois pôles magnétiques statoriques 10, 12 et 20 sont situés dans un même plan statorique et définissent conjointement avec deux branches 22 et 24, portant chacune une bobine 26 et 28, deux circuits magnétiques principaux du transducteur. Ce transducteur est particulièrement adapté à un fonctionnement pas à pas, en particulier lorsqu'un nombre relativement élevé de pas par tour est souhaité. The electromechanical transducer comprises a stator 4 formed of three parts 6, 8 and 18 each having merlons or teeth 52, 54 and 60 superimposed on a multipolar magnet 34 of the rotor 30. The three stator magnetic poles 10, 12 and 20 are located in the same stator plane and jointly define with two branches 22 and 24, each carrying a coil 26 and 28, two main magnetic circuits of the transducer. This transducer is particularly suitable for step-by-step operation, in particular when a relatively high number of steps per revolution is desired.

Electromagnetic converter for driving an electric clock

Multipole stepper motor.

Patent DE263563C

Pulse motor

Improvements in or relating to Silent and Balanced Electro-magnetic Step-by-step Driving or Synchronizing Mechanism particularly applicable to the Control of a System of Time Indicating Units.

6970. Craig, E. E. March 19. Electric clocks.-Relates to electro-magnetic stepby - step mechanism, particularly applicable to secondary electric clocks, of the kind in which an armature having polar extensions is caused. to rotate intermittently by the successive energization of electro-magnets arranged in a circle around the armature. According to this invention, there are only three line-wires a, b, c in the system, the wire c being a common return wire. The electromagnetic pole-pieces A, A<1> and B, B<1>, &c. surrounding the armature are connected in pairs successively to a source of unidirectional current X through the lines a, b alternately, by means of the contact-device S at the transmitting-station. The polar extensions of the armature M constitute leading-horns H, as shown. In order to prevent overshooting, the intermittent currents are prolonged for a second or two longer than is necessary for producing each step, while residual magnetism in the electro-magnets may prevent accidental movement of the armature between the impulses. The spindle D of the armature may be vertical, driving time-indicating or other mechanism through worm-gearing, as shown in Fig. 4.

Patent FR2397748B1

Step motor

SINGLE-PHASE STEPPER MOTOR, ESPECIALLY FOR WATCHES

L'invention a trait à un moteur pas à pas monophasé. Elle a pour objet de réduire la consommation d'énergie et d'améliorer le rendement et l'encombrement d'un tel moteur en réalisant les pâles principaux et auxiliaires associés à une partie de stator sous la forme d'un ensemble unitaire en tôle avec cette partie de stator. Application : notamment aux montres électriques. The invention relates to a single-phase stepping motor. Its object is to reduce energy consumption and improve the efficiency and size of such a motor by producing the main and auxiliary blades associated with a stator part in the form of a unitary sheet metal assembly with this part of stator. Application: in particular to electric watches.

Patent CH675047B5

The stepping motor includes a section of magnetic core (1) round which the coil (2) is wound. This is linked to the stator pole piece (3) with an aperture in which the rotor (6) is mounted. The stator is extended by an additional arm (3b2) which entends from the pole piece section. This is intended to attenuate the interaction between the external magnetic field and the rotor. The stator is formed by cutting and stamping. ADVANTAGE - Motor has improved resistance to interference from external magnetic fields. (5pp Dwg.No.3/5)

SINGLE-PHASE STEP MOTOR

The invention relates to a single-phase stepping motor whose stator has a core (2) with a winding (1), and a metal sheet (3) with an opening (4) in which a rotor (7) with a permanent magnetic is arranged. The metal sheet (3) has a transverse slot (9) in the region adjacent to the opening (4), whose width is determined by a necessary magnetic asymmetry of the stator poles, in the same way as the shape of the axis line (10) of the slot (9), which asymmetry is sufficient to generate a predetermined starting and stopping torque of the motor. The invention can be used in time measuring apparatuses and in automatic systems.

Stepping motor for low control powers - has permanent magnet rotor with poles of alternating polarities and claw poles on stator

The motor has two stator parts with claw poles arranged on a cylindrical surface, and surrounded by a cylindrical excitation winding. Outer dia. of the pole claw circle (5, 6) corresponds to the outer dia. of the permanent magnet rotor (4, 8), and the pole claw parts (5, 6) are close to the lateral surfaces of the magnet rotor (4, 8) separated from it only by an axial air-gap (37, 38). The rotor is magnetised in axial direction, and the air-gaps (37, 38) increased in the direction of rotation.

Multipole step motor

Le rotor multipolaire est aimanté dans le sens axial et comporte, dans une de ses faces située en regard des pièces polaires, des pôles alternativement nord et sud répartis le long de sa périphérie. Chacune des pièces polaires présente un bord intérieur concave muni de dents séparées par les zones intercalaires. Le noyau, sur lequel est monté la bobine, couple magnétiquement les pièces polaires à la bobine. Le pas as des dents des pièces polaires est différent du pas .alpha.r des pôles du rotor. The multipolar rotor is magnetized in the direction axial and has, in one of its faces located opposite pole pieces, alternating north and south poles distributed along its periphery. Each of the pieces polar has a concave inner edge with teeth separated by infill areas. The nucleus, on which is mounted the coil, magnetically couples the parts reels. The not ace of parts teeth polar is different from the .alpha.r pitch of the rotor poles.

ELECTROMAGNETIC MOTOR FOR WATCHMAKING PART.

Patent FR2131979B1

Rotor assembly for electro-mechanical transducer

Electrical stepping motor

MOTOR DEVICE, ESPECIALLY FOR WATCHMAKING.

A multipole step by step machine

Arrangement for controlling electric clocks by electric waves

PULSE MOTOR

A pulse motor comprising a rotor having at least two magnetization axes extending parallel to a shaft of the rotor and angularly spaced apart at a uniform interval, the direction of magnetization of each magnetization axis being opposite to that of the adjacent magnetization axis; a pair of upper stators extending above the rotor and defining two upper gaps between them, said upper gaps being adapted to face respective unlike polarity poles on the upper side of the rotor; a pair of lower stators extending below the rotor and defining two lower gaps between them, said lower gaps being adapted to face respective unlike polarity poles on the lower side of the rotor; and at least one drive coil for magnetizing the upper and lower pair stators alternately to opposite polarities such that the polarity of one of the upper pair stators and one of the lower pair stators is opposite to the polarity of the other upper and lower stators.

Patent FR2276724B1

1463223 Stepping motors DAINI SEIKOSHA KK 19 May 1975 [25 June 1974] 21286/75 Heading H2A In a stepping motor comprising a permanently magnetized rotor 5 and a wound stator having a pair of pole pieces 3, 4 with part-cylindrical pole faces 3a, 4a, a recess 12a or 12b is provided in at least one of the pole faces 3a, 4a, and a bush 24 is used to locate the pole pieces 3, 4 on a mounting plate 22 so that the pole faces 3a, 4a are coaxial with the rotor 5. In the motor shown, the bush 24 is fixed in an aperture 23 in the plate 22, and supports one of two rotor bearings 20, 21, and as a consequence of the recesses 12a, 12b the rotor 5 can only rotate in one direction if a pulse train such as in Fig. 6 (not shown), is delivered to a stator winding 1. The recesses need not be opposite one another, and may have various other shapes, e.g. as in Figs. 7A-7F (not shown). The motor may be used in electric watches (no details).

Electronic time-piece

1383526 Electronic timepieces SUWA SEIKOSHA KK 2 March 1972 [3 March 1971] 29727/74 Divided out of 1383525 Heading G3T The Specification describes an electronic timepiece with an oscillator driving a stepping motor as in Specification 1383525 but the claims relate to the use of a switch and a stem such that, when the stem is pulled out, the timepiece is stopped indicating an even number of seconds, and when the stem is pushed in, the seconds hand is caused to advance after an interval of one second.

Electromagnetic stepper control

Silent receiving electric pendulum

SINGLE-PHASE MOTOR STEP

The invention relates to a single-phase stepping motor whose stator has a core (2) with a winding (1), and a metal sheet (3) with an opening (4) in which a rotor (7) with a permanent magnetic is arranged. The metal sheet (3) has a transverse slot (9) in the region adjacent to the opening (4), whose width is determined by a necessary magnetic asymmetry of the stator poles, in the same way as the shape of the axis line (10) of the slot (9), which asymmetry is sufficient to generate a predetermined starting and stopping torque of the motor. The invention can be used in time measuring apparatuses and in automatic systems.

SYNCHRONOUS SMALL MOTOR OR STEPPER MOTOR

Patent FR2220820B1

Patent CH675810B5

The motor includes two stator pole pieces (2a, 2b) surrounding a rotor (3). A coil former (4) links the two pole pieces together, and a coil is wound on this former. The pole pieces have a degree of asymmetry w.r.t. the axis (BB') passing through the rotor, in order to provide favourable starting conditions. The core of the coil is made from a semi-hard ferromagnetic material having a coercive field between 150 and 450/m. The permanent magnet rotor has a coercive field of less than 300 kA/m. ADVANTAGE - Has more efficienct operation.

PROCEDURE FOR CONTROLLING A DISCONTINUOUS ROTATION MOTOR FOR A QUARTZ CLOCK PART.

TIME METER MOVEMENT

Motor-driven movement for timepieces wherein stator block core is formed in ring-shape with a magnetic material of a rounded bar, magnetic poles formed at both core ends are disposed as directed radially inward of the core and rotary shaft of minute hand wheel of output gear train meshing with a rotor disposed between the poles is radially displaced from the center of the core to the side opposite the magnetic poles, whereby internal space of the ring-shaped core having a coil wound thereon is efficiently utilized for arranging all internal components substantially within dimensions of the coil and minimizing the entire size of the movement.

Patent FR2433851B1

A micro stepping motor for use in compact electronic watches comprises a magnetic core, a coil winding wound on the magnetic core, and a one-piece stator connected to the magnetic core to define therewith a closed magnetic flux path. The stator has a necked portion defining a region of reduced cross-sectional area along its length, and a hole extends through the stator at the center of the necked portion. A rotor having at least one pair of magnetic poles is rotatably disposed within the stator hole with an air gap therebetween. The rotor rest positions are determined by either a pair of protrusions extending into the air gap at diametrically opposed sites about the stator hole, or a pair of recesses opening into the air gap at diametrically opposed sites about the stator hole.

Patent CH675940B5

The stepping motor includes a magnetic stator circuit made of soft ferromagnetic material, with a coil (3). The magnetic circuit provides two parallel branches accommodating two rotors (1, 2) linked to different drive trains (11, 12). The positioning torques acting on the two rotors are different, allowing them to be controlled selectively by applying different pulses to the coil. The magnetic circuit is nevertheless provided by a single piece common to both rotors. ADVANTAGE - Single motor provides independent control of different aspects of watch mechanism.

Patent JPH0576262B2

Patent FR2402340B1

Patent FR2131979A1

Multipole step motor

Le rotor multipolaire est aimanté dans le sens axial et comporte, dans une de ses faces située en regard des pièces polaires, des pôles alternativement nord et sud répartis le long de sa périphérie. Chacune des pièces polaires présente un bord intérieur concave muni de dents séparées par les zones intercalaires. Le noyau, sur lequel est monté la bobine, couple magnétiquement les pièces polaires à la bobine. Le pas as des dents des pièces polaires est différent du pas .alpha.r des pôles du rotor.

2-pole stepper motor for timepiece

A stator (1) comprises a first stator portion (1a) and a second stator portion (1b), which consist of high-permeability material and are united by welding with low-permeability or nonmagnetic connections (1c, 1d) interposed. The stator includes a hole (2) provided with a pair of recesses (5a, 5b), which establish an initial phase angle (υ1) and serve as means for setting the torque to hold the rotor (3) magnetically. A field coil (7) is connected magnetically between the terminals of the stator (1) to form a two-pole stepper motor for a timepiece.

Timpiece device

电子控制的机械时计中的发电机(120)，其中使布置在主夹板(2)外周侧上的线圈(134)的磁芯绕组部件(133b)比内侧线圈(124)的磁芯绕组部件(123b)短。因此，与传统的相比可以减小开口(2c)的开口面积并且减小主夹板(2)的外径，为确保主夹板(2)的强度而保持开口(2c)拐角部分和主夹板(2)外周之间的距离D1不变，因此减小时计的尺寸。

Stepper motor driving circuit arrangement for an electronic timepiece

1453902 Electronic timepieces SUWA SEIKOSHA KK 9 July 1974 [17 July 1973] 30397/74 Heading G3T [Also in Division H2] A stepper motor in an electronic timepiece (e.g employing a quartz crystal controlled oscillator) is provided with a drive circuit 20, Fig. 1 which is arranged to apply drive pulses (as illustrated in Fig. 3 and in a manner not described) to a drive coil 5 and to short circuit the coil in the intervals between drive pulses. The motor rotor 3 begins to rotate at a point 14, Fig. 3 and will have rotated through a predetermined angle by the time the drive pulse is terminated and the coil short circuited at a point 15 which corresponds to a stable position of the rotor. Subsequent oscillations of the rotor about this stable position, induce a current in coil 5 as indicated at 15-18. The induced current is in a direction which is such as to oppose the rotor oscillations and acts as a braking force on the rotor.

ELECTROMECHANICAL TRANSDUCER WITH PERMANENT MULTIPOLAR MAGNETS

Stepper motor driving circuit arrangement for an electronic timepiece

Analogue electronic chronograph timepiece

An analogue electronic timepiece comprises a first stepping motor 6, 41, 42 (Fig. 3) driven by 1 Hz pulses from a frequency divider and driving via first gears, seconds, minutes and hours hands (44a, 61, 62) respectively, to indicate time of day; a second stepping motor 18, 43, 45 driven by 10 Hz pulses from the frequency divider and driving via second gears, a seconds hand 14a and a minutes hand 12a of a chronograph display, the seconds hand 14a rotating with one tenth second steps. <IMAGE>

Stepping motor

Electronic timepiece