US 5,543,877 A · Means for controlling driving of a driving fork and take-up spool for automatic feeding and rewinding of a film in a camera

Abstract

An automatic film feed camera includes a fork which engages a film cartridge spool to drive film out of the cartridge. When a camera cover closes a film cartridge chamber, the motor driving the fork is energized. If a detector fails to detect proper loading of a cartridge within a given time limit, the motor is turned off. When proper film loading is detected, pulses generated by a rotation detector are counted, representing the quantity of film sent toward the take-up spool. When this count reaches a predetermined quantity, driving of the fork is stopped, and driving of a take-up spool is started. If the detection device for detecting rotation of the fork fails to generate pulses indicating rotation of the fork within a given time limit after initiation of driving the take-up spool, driving of the take-up spool is stopped and the film is rewound into the cartridge by driving the fork in a reverse direction in accordance with the count represented by the sent quantity of film.

Claims13

Dependent claims

A film feeding mechanism of a camera for sending film rolled around a shaft member in a film magazine from an outlet of said film magazine by rotating said shaft member, comprising:

a) rotation transmitting means being linked with said shaft member for sending film from said magazine by rotating said shaft member;
b) rotation driving means for selectively supplying torque to said rotation transmitting means in an intended and a reverse direction;
c) measuring means for measuring a rotational quantity of said rotation transmitting means;
d) rolling means for rolling the sent film;
e) rolling failure detecting means for detecting that the sent film has failed to be rolled by said rolling means;
and
f) control means for controlling rotational quantity of said rotation transmitting means in response to an output by said rolling failure detecting means by rotating said rotation driving means in said reverse direction in response to said output of said rolling failure detecting means and controlling a quantity of rotation in the reverse direction in accordance with an output of said measuring means.

4 more elements

Dependencies are inferred from the claim text.

Means for controlling driving of a driving fork and take-up spool for automatic feeding and rewinding of a film in a camera

Life of this patent

Means for controlling driving of a driving fork and take-up spool for automatic feeding and rewinding of a film in a camera

Life of this patent

Abstract

Claims13