Method and arrangement for manual stop-down mirror-ups of single

Details Method and arrangement for manual stop-down mirror-ups of single Method and arrangement for manual stop-down mirror-ups of single

1975-04-14

1976-06-01

Hix, L. T.

354272, G03B 1912

Patent

active

039613437

ABSTRACT:
A control assembly and method are disclosed for providing manual stop-down mirror-up operations in a single lens reflex camera having a camera ready condition wherein an automatic diaphragm arrangement normally biases a diaphragm operating member to a full open position and a quick-return mirror arrangement normally biases a mirror to a viewing position. The control includes a button externally mounted on the camera for manual rotational movement between first and second button positions and for manual depressing operation in each of the button positions. In the first button position, depression of the button biases the diaphragm operating lever to a stop-down position with the mirror in the viewing position and release of the button returns the diaphragm lever to the normal full open position. In the second button position, depression of the button again provides the stop-down operation and also biases the mirror to a mirror-up shutter operating position. A button lock is provided at the end of the depression stroke in the second button position to retain the stop-down and mirror-up condition. The button lock is disengaged and the camera is returned to its camera ready condition upon manual rotational movement of the button to its first position.

REFERENCES:
patent: 3643572 (1972-02-01), Kurei
patent: 3829872 (1974-08-01), Ueda et al.
patent: 3893141 (1975-06-01), Uno et al.
patent: 3906519 (1975-09-01), Ueda et al.

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