Improvements in or relating to electrical position indicators
Номер патента: GB1089242A
Опубликовано: 01-11-1967
Автор(ы): Anthony George Robinson
Принадлежит: Westland Aircraft Ltd
Опубликовано: 01-11-1967
Автор(ы): Anthony George Robinson
Принадлежит: Westland Aircraft Ltd
Реферат: 1,089,242. Correspondence control systems. WESTLAND AIRCRAFT Ltd. Sept. 27, 1965 [Oct. 1, 1964], No.39911/64. Heading G1N. A correspondence control system, e.g. for a hovercraft steering gear, comprises a pick-off device including first and second relatively movable parts, one part being angularly displaceable relative to the other about a pivotal axis, an elongated coil assembly 5 (Fig. 5) on one part and a detector coil 11 on the other part, the coil assembly comprises two compound coil windings on a core in end to end relationship and curved Fig. 3 (not shown), the radius of the curve being equal to the distance between the pivotal axis and the detector. The coils are connected in phase opposition and have a greater density of turns at their ends away from their junction as illustrated in Fig. 3 (not shown) so that when energized with A. C. there is a non-uniform flux density along the core and a voltage will be induced in the detector coil of a magnitude and phase dependent upon its position on a path parallel to and at a constant distance from the longitudinal axis of the coil assembly. This voltage will increase from a null value, when the detector coincides with the junction of the coils, to a maximum value at each end of the core. A ferrite slug 12 may be inserted at each end of the core for trimming purposes and to increase the induced voltage when the detector coincides with the core ends. On a hovercraft either the detector part or the coil assembly may be fixed to the hull while the other part is fixed to a propeller pylon (3) Figs. 1, 2 (not shown). In operation an armature of a steering wheel demand pick-off 14 (Fig. 4) is mechanically connected to a steering wheel, movement of which produces an output demand signal which is fed to an amplifier 15. The amplified signal is fed to an electromagnetic valve which initiates movement of hydraulic rams causing pylon 3 to move carrying the detector coil with it, and the detector coil output is fed to the amplifier in such a sense as to cancel the demand signal from the steering pick-off.
IMPROVEMENTS IN ORGANIC COMPOUNDS OR RELATED TO ORGANIC COMPOUNDS
Номер патента: IT1164205B. Автор: Hans Peter Stakelbeck. Владелец: SANDOZ AG. Дата публикации: 1987-04-08.