Document Type and Number:
Japanese Patent JPS4934331
Kind Code:
A
Abstract:
A camera which ordinarily prevents double exposures but which includes structure to permit a second exposure only if the film has not been advanced by any fraction of a frame length after a first exposure. A film transporting structure is driven from a transmission through a clutch which is disengaged to prevent operation of the film transporting structure. The transmission also operates a take-up spool which remains stationary, when blocked by a blocking structure, while the transmission continues to operate. A manually operable structure (button) normally has a rest position at which the blocking structure is in a non-blocking position and the clutch between the transmission and the film transporting structure is engaged. This manually operable structure can be displaced from its rest position to a rewind position at which only the clutch is placed in its disengaged position so that at this time exposed film can be rewound. The manually operable structure also has a multiple exposure position where the clutch is also disengaged and where the blocking structure is in a blocking position, so that at this time a shutter can be cocked when the transmission is operated, while the film will remain stationary so that a multiple exposure can be made. A pivotable safety lever extends into the path of the button. It prevents the button from being depressed to move the blocking member, except when displaced by a cam on the film takeup shaft at intervals of one full frame length. This safety structure insures that double exposures are made in registry.
Application Number:
JP7514872A
Publication Date:
March 29, 1974
Filing Date:
July 28, 1972
Export Citation:
International Classes:
G03B17/30; G03B9/68; G03B17/42; (IPC1-7): G03B17/42