Electric shutter means equipped with a self-timer mechanism

Details Electric shutter means equipped with a self-timer mechanism Electric shutter means equipped with a self-timer mechanism

1975-05-05

1978-02-21

Adams, Russell E.

354 23D, 354 50, 354 51, 354 60R, 354239, 354266, 354267, G03B 964

Patent

active

040756483

ABSTRACT:
An electric shutter means so made that, in order to make the consumption of a current source battery as little as possible, during the period from the beginning of the operation of a self-timer by pressing a release button to the end of the operation, only the passage of an electric current to an electromagnet to start the motion of closing a rear blade may be prevented or a very small current may be made to flow to said electromagnet and, simultaneously with the closure of a current source switch by pressing the release button, an exposure warning circuit and exposure time indicating circuit may be held in an operating state.

REFERENCES:
patent: 3921187 (1975-11-01), Kobori et al.
patent: 3921188 (1975-11-01), Imura et al.

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