Device for checking the rotation of a take-up spool in a camera

Details Device for checking the rotation of a take-up spool in a camera Device for checking the rotation of a take-up spool in a camera

1975-10-28

1976-12-21

Gonzales, John

354202, G03B 100

Patent

active

039991989

ABSTRACT:
In a camera having a film take-up spool rotatable by an advance gear train operatively associated with a film advance lever having a preparatory angle, there is provided a device for checking the rotation of the take-up spool which comprises a rotatable cam operatively associated with the film take-up spool and displaceable so as to assume a first position when the advance lever is in its retracted position and to assume a second position when the advance lever is pulled out beyond the preparatory angle, a lever operatively associated with the back cover of the camera and displaceable so as to assume a first position when the back cover is open and to assume a second position when the back cover is closed, and a checking member operatively associated with the cam and the lever to assume a position for restraining the advance gear train only when both of the cam and the lever assume their first positions and otherwise to assume a position for releasing the restraint.

REFERENCES:
patent: 2241122 (1941-05-01), Drotning
patent: 3465658 (1969-09-01), Hackenberg
patent: 3925798 (1975-12-01), Sanada et al

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