Abstract: A lock system having a single direction closure comprising a permutation lock having a simplified mechanical arrangement for setting the combination for opening the closure. Upon actuation of the permutation lock, a protrusion therefrom releases a lever having a recess lock on a dog connected to the rotating spindle. The hub and spindle are severed to permit a single direction opening of the closure. The closure is reset by turning the combination knob on the permutation lock. The components are mechanically rugged and interrelated to provide the utmost in security; but yet, the minimum of inconvenience in opening.

Abstract: An automatic film retrieval system of the type which utilizes film having a plurality of frames, each frame including document images and an adjacent frame marker to facilitate sensing and counting of the frames has an improved film speed drive control circuit which causes the film to be driven at high speed when a desired film frame is greater than a fixed given number of frames away from the actual present frame and at low speed when the desired film frame is less than or equal to a fixed given number of frames away from the actual present frame. The system additionally has an automatic film drive direction control circuit and a stop-go and reset control circuit.