Mechanism for controlling a timed function in a camera

Details Mechanism for controlling a timed function in a camera Mechanism for controlling a timed function in a camera

1979-03-09

1980-02-26

Hix, L. T.

354226, 354267, G03B 908, G03B 1700, G03B 1740

Patent

active

041903420

ABSTRACT:
A spring member is provided to oscillate a magnet selectively at different initial amplitudes and, after dampening for respective different intervals of time, at a predetermined lesser amplitude. During such oscillation, the magnet applies an attractive force to a latch for a time period that varies inversely with the amplitude. As oscillation of the magnet progressively diminishes to the predetermined amplitude, application of the magnetic force to the latch progressively increases in duration until, at the predetermined amplitude, the magnetic force is applied for a time period sufficient to move the latch to release a closing blade, which terminates an exposure interval.

REFERENCES:
patent: 2966106 (1960-12-01), Schackert
patent: 3471226 (1969-10-01), Wasielewski et al.
patent: 3860937 (1973-12-01), Wolfe
patent: 3952317 (1975-03-01), Galbraith
patent: 4025930 (1976-01-01), Wolff

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