Film advance mechanism for still cameras

A still camera comprising a housing adapted to hold a roll of film having a succession of frames;

• an openable shutter on said housing alignable with said film;
• a takeup wheel in said housing connectable to said roll of film and rotatable to wind up same and displace said frames one-by-one past said shutter;
• a film-advance slide displaceable on said housing between a pulled-out position projecting from said housing and a pushed-in position fitting snugly with said housing;
• means in said housing including a transmission and a one-way coupling between said slide and said takeup wheel for rotating same and winding up said film on displacement of said slide from said pushed-in position toward said pulled-out position;
• and means in said housing engageable with said film, connected to said shutter, and connected to said transmission for arresting said slide and said film each time a fresh frame of said film is aligned with said shutter and for freeing said slide for movement after opening of said shutter and exposure of the fresh frame, said slide including a link formed with a pair of in-line slots extending in the direction of displacement of said slide on said housing, said slide having a slide pin extending into one of said slots and a slide spring between said link and said slide, said housing having a housing pin extending into the other of said slots and a housing spring between said housing and said link, said link being formed with a rack constituting part of said means including said transmission.

A still camera comprising a housing adapted to hold a roll of film having a succession of frames;

• an openable shutter on said housing alignable with said film;
• a takeup wheel in said housing connectable to said roll of film and rotatable to wind up same and displace said frames one-by one past said shutter;
• a film-advance slide displaceable on said housing between a pulled-out position projecting from said housing and a pushed-in position fitting snugly with said housing;
• means in said housing including a transmission and a one-way coupling between said slide and said takeup wheel for rotating same and winding up said film on displacement of said slide from said pushed-in position toward said pulled-out position;
• and means in said housing engageable with said film, connected to said shutter, and connected to said transmission for arresting said slide and said film each time a fresh frame of said film is aligned with said shutter and for freeing said slide for movement after opening of said shutter and exposure of the fresh frame, said transmission including a first gear wheel and said slide being provided with a rack, said one-way coupling including a coupling gear wheel having a pivot axis, said housing being formed with an elongated slot receiving said axle, said axle being displaceable in said slot between a coupling position meshing with both said first gear wheel and with said rack and a decoupling position out of mesh with at least said first gear wheel.