Camera with exposure counting mechanism

Details Camera with exposure counting mechanism Camera with exposure counting mechanism

1995-02-15

1996-03-26

Mathews, A. A.

354213, G03B 1736

Patent

active

055025315

ABSTRACT:
A photographic camera adapted to provide respective visible indications corresponding to successive frames of exposed filmstrip as each one of the frames is exposed includes a counter wheel having a plurality of ratchet teeth about its periphery, the ratchet teeth corresponding to the advance of the filmstrip, a holding lever including a pawl for engaging the ratchet teeth when film is present in the camera and for disengaging the ratchet teeth when film is not present in the camera, and an advancing lever in communication with the camera shutter button for incrementally rotating the counter wheel in response to shutter button actuation.

REFERENCES:
patent: 1620040 (1927-03-01), Schade
patent: 1888134 (1932-11-01), Kunkler
patent: 2278342 (1942-03-01), Ziegler
patent: 3363528 (1968-01-01), Winkler et al.
patent: 3722386 (1973-03-01), Furuta
patent: 4268150 (1981-05-01), Chen
patent: 4707096 (1987-11-01), Lawther

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