Optics: image projectors – Slide transfer mechanism – Gravity operated
Patent
1984-06-01
1986-04-15
Haroian, Harry N.
Optics: image projectors
Slide transfer mechanism
Gravity operated
353DIG1, G03B 2300
Patent
active
045824070
ABSTRACT:
The automatic distributor comprises a loader (2) in which slides (3) are stacked and a separation mechanism (10) intended to isolate the lowest slide (3a) of the stack. It comprises, for this purpose, support elements consisting of claws (12) and locking elements in the form of pins (11) that work with the edge of the lower bottom slides. A motor (21) drives cams (19) intended to control the movement of the claws (12) and of the pins (11) urged by a spring (29). An optoelectronic device (36) makes it possible to detect the drop of a slide (3a) and to reverse the direction of rotation of the motor (21). Following a slide advance order, the motor (21) drives the cams (19) which allow the unit of the pins (11) to press against the edge of the lowest slides. The claws (12) are withdrawn and then gradually the pins (11) are withdrawn. As soon as the lowest slide (3 a) falls, it activates the optoelectronic device (36) which reverses the direction of the motor (21). The claws (12) take their place again, the pins (11) are separated and the stack of slides presses against the claws (12). The distributor makes it possible to isolate surely and smoothly the lowest slide of a stack composed of slides (3) which may have very different thicknesses.
REFERENCES:
patent: 3394477 (1968-07-01), Johannsen
patent: 3656846 (1972-04-01), Hipelius et al.
patent: 4274719 (1981-06-01), Rochat
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