Independent mirror swing-up means in a single lens reflex camera

Details Independent mirror swing-up means in a single lens reflex camera Independent mirror swing-up means in a single lens reflex camera

1973-10-15

1976-02-03

Hix, L. T.

354 51, G03B 1912, G03B 708

Patent

active

039368483

ABSTRACT:
A manually operable mirror swing-up lever is associated with an exposure information memorizing device. The exposure information memorizing device has a locking lever which locks a sliding contact movable on a variable resistor at a position representing the exposure information. The variable resistor is connected in parallel with a memory capacitor in an electric circuit for controlling an electric shutter. The terminal voltage of the variable resistor is controlled to be equivalent to the terminal voltage of the memory capacitor. When the mirror is swung up by the manually operable mirror swing-up lever, the sliding contact is locked in position to make the variable resistor work as an equivalent for the capacitor, and the resistor is substituted for the memory capacitor.

REFERENCES:
patent: 3503313 (1970-03-01), Kuromoto
patent: 3543658 (1970-12-01), Reimann
patent: 3623410 (1971-11-01), Meta
patent: 3643572 (1972-02-01), Hurei

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