Means for Displaying Automatically and Successively Pictures, Advertisements and the like, arranged as a Panorama.
Номер патента: GB191500227A
Опубликовано: 16-12-1915
Автор(ы): Charles Edwin Dawes, Charles Varnam
Принадлежит: Individual
Опубликовано: 16-12-1915
Автор(ы): Charles Edwin Dawes, Charles Varnam
Принадлежит: Individual
Реферат: 227. Varnam, C., [trading as Avery & Co., J. H.], and Dawes, C. E. Jan. 6. Panoramas.-In an apparatus for displaying automatically and successively pictures, advertisements, &c., employing two rollers upon which the pictures are wound, a main shaft b is intermittently rotated from a continuously turning wheel e<2> by a pawl e<1> on a collar e on the shaft b. A bevel-wheel e', mounted so as to turn by friction on the piece carrying the wheel e', has a cam-path which engages a pin e<11> on the pawl e<1> to disengage the pawl from the wheel e' when the wheel e<5> is arrested. The wheel e' is stopped at intervals by slats f<4> between the pictures f coming under and raising a shoe h, and so allowing a link h<2> and a pawl h' to fall and engage the teeth of the wheel e<5>. The pawl h' is raised after a certain length of time by a continuously moving eccentric e<4>, which rotates, by pawl and ratchet with adjustable feed, a cam i<5> on a fixed rod i<1> till the cam i<5> contacts with a projection on the pawl h<3>. A slot connexion h<4> between the link h' and pawl h' allows the pawl to rise without lifting the link h', which rises by gravity or spring control only when the slat f<4> has moved from under the shoe h. Two clutch members b<3> are provided for coupling up one or other of the winding- rollers a to the shaft b, and are moved to reverse the direction of motion of the pictures f by a link l<1>, bell-crank l, and spring-extensible rod k<3>, k<4> connected to an eccentric k, which carries at a lower level two reversing-drivers k'. These are pivoted near their middle and have their lower ends normally held outwardly, the left-hand one by a fixed cam k<2>, and the righthand one by a wiper j<2> on a shaft j<1>. This shaft j<1> rocks through a small angle when an extra long slat on the end pictures contacts with projections j on the shaft j<1>, so moving the wiper j<2> to allow the right-hand driver k<1> to fall vertically and be met by a rotating pin i' and turned through 180 degrees, whereupon the cam k' moves it out of the path of the pin i<5> and the shaft j<1>, rocking back under the withdrawal. of the end slats, raises the right-hand driver k' again clear of the pin i<6>. A friction device for maintaining the pictures stretched is provided on each roller, and comprises weighted levers which fly outwardly by centrifugal action when the speed of the rollers increases, and so reduce the pressure of their inner ends on a one-way friction ring, thus maintaining a constant braking effect at all speeds. A governor is provided to prevent racing when an electric motor is employed. The long end slats are received in a groove in each roller. A freewheel device d on the main shaft b prevents this from rotating in an opposite direction to that in which it is driven.
An improved means for displaying pictures, advertisements and the like
Номер патента: GB449793A. Автор: . Владелец: Individual. Дата публикации: 1936-07-03.