Film rewinding device for movie camera

In a motor-driven motion-picture camera which is capable of selective use of both a type A magazine provided with a non-releasable anti-backup device on an exposed film take-up shaft and a type B magazine provided with an externally releasable anti-backup device on said film take-up shaft, and which includes a winding gear rotatable in response to the motor operation and a member secured to said gear for rotating said take-up shaft with rotation of said gear, the improvements comprising:

• a. detector means having a first position upon loading of a type A magazine and a second position upon loading of a type B magazine, so as to detect the type of magazine loaded;
• b. means associated with said detector means for positioning said winding gear at a first position when a type A magazine is loaded and at a second position when a type B magazine is loaded;
• c. means for disabling said anti-backup device for the type B magazine when this type of magazine is loaded;
• d. means including a counting gear for counting the film footage of forward feed and reverse feed during overlap, double exposure and reverse photographing;
• and
• e. manually displaceable control means including a connecting gear driven by said motor and displaceable from a first position remote from said counting gear to a second position at which said counting and connecting gears mesh for coupling said counting means to said motor, said connecting gear at its first position meshing with said winding gear, said connecting gear at its second position also meshing with said winding gear when said winding gear is at its second position but not when said winding gear is at its first position.

In a motor-driven motion-picture camera which is capable of selective use of both a type A magazine provided with a non-releasable anti-backup device on an exposed film take-up shaft and a type B magazine provided with an externally releasable anti-backup device on said film take-up shaft, and which includes a winding gear rotatable in response to the motor operation and a member secured to said gear for rotating said take-up shaft with rotation of said gear, the improvements comprising:

• a. detector means having a first position upon loading of a type A magazine and a second position upon loading of a type B magazine, so as to detect the type of magazine loaded;
• b. stop means associated with said detector means and having a first position when a type A magazine is loaded and a second position when a type B magazine is loaded;
• c. means for disabling said anti-backup device for the type B magazine when this type of magazine is loaded;
• d. means including a counting gear for counting the film footage of forward feed and reverse feed during overlap, double exposure of reverse photographing;
• and
• e. manually displaceable control means including a connecting gear driven by said motor and displaceable from a first position remote from said counting gear to a second position at which said counting and connecting gears mesh for coupling said counting means to said motor and including a winding gear control member displaceable from a first position to a second position for locking said winding gear against winding rotation when said stop means is at its first position, said control member being kept from displacement to its second position by engagement with said stop means at its second position, thereby to permit rotation of said winding gear.

In a motor-driven motion-picture camera which is capable of selective use of both a type A magazine provided withh a non-releasable anti-backup device on an exposed film take-up shaft and a type B magazine provided with an externally releasable anti-backup device on said film take-up shaft, and which includes a winding gear rotatable by a driving gear in response to the motor operation and a member secured to said winding gear for rotating said take-up shaft with rotation of said winding gear, the improvements comprising:

• a. detector means having a first position upon loading of a type A magazine and a second position upon loading of a type B magazine, so as to detect the type of magazine loaded;
• b. stop means associated with said detector means and having a first position when a type A magazine is loaded and a second position when a type B magazine is loaded;
• c. means for disabling said anti-backup device for the type B magazine when this type of magazine is loaded;
• d. means including a counting gear for counting the film footage of forward feed and reverse feed during overlap, double exposure and reverse photographing;
• and
• e. manually displaceable control means including a connecting gear driven by said motor and displaceable from a first position remote from said counting gear to a second position at which said counting and connecting gears mesh for coupling said counting means to said motor and including a winding gear control member displaceable from a first position to a second position for moving said driving gear away from said winding gear when said stop means is at its first position, said control member being kept from displacement to its second position by engagement with said stop means at its second position, thereby to permit said driving gear to drive said winding gear.