Film strip handling

GPHYSICS G03Photography G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES ACCESSORIES THEREFOR

G03B1/00Film strip handling

G03B1/02Moving film strip by pull on end thereof G03B1/04Pull exerted by take-up spool G03B1/06rotated by lever operated ratchet and pawl G03B1/08rotated by band, chain, rack, or other linear reciprocating operation G03B1/10rotated by knob through gearing G03B1/12rotated by motor G03B1/14Special arrangements to ensure constant length of movement of film G03B1/16by film-arresting pins G03B1/18moving film strip by means which act on the film between the ends thereof G03B1/20Acting means G03B1/22Claws or pins engaging holes in the film G03B1/24Sprockets engaging holes in the film G03B1/26Spiked wheels or pins not penetrating the film G03B1/28Shuttle feed G03B1/30Belt feed G03B1/32Friction grippers or rollers G03B1/34Beaters G03B1/36Pneumatic acting means G03B1/38embodying Geneva motion G03B1/40embodying frictional coupling or clutches G03B1/42Guiding, framing, or constraining film in desired position relative to lens system G03B1/44Guides engaging edge of film G03B1/46Rollers engaging face of film G03B1/48Gates or pressure devices G03B1/50adjustable or interchangeable G03B1/52Pneumatic pressure devices G03B1/54Tensionning or loop-maintaining devices G03B1/56Threading Loop forming G03B1/58automatic G03B1/60Measuring or indicating length of the used or unused film Counting number of exposures G03B1/62involving locking or stop-motion devices G03B1/64by means which as certain the radius of the film coiled on a spool G03B1/66Counting number of exposures