Film advance mechanism for still cameras

摘要

A still camera has a housing adapted to hold a roll of film having a succession of frames. An openable shutter is provided on the housing alignable with the film and a takeup wheel in the housing is connectable to the roll of film and rotatable to wind the film up and displace the frames one-by-one past the shutter. A film-advance slide is displaceable on the housing between a pulled-out position projecting from the housing and a pushed-in position fitting snugly with the housing. A transmission and a one-way coupling are provided in the housing between the slide and the take-up wheel so that the take-up wheel is rotated to wind up the film only on displacement of the slide from the pushed-in position to the pulled-out position. Furthermore, a frame-sensing mechanism in the camera arrests displacement of the slide or a portion of the slide in the direction toward the pulled-out position when a fresh frame is properly aligned with the shutter.