Patent
1975-07-08
1977-01-25
Gonzales, John
354239, 354272, G03B 1912
Patent
active
040054594
ABSTRACT:
A manual stop button or depth of field button is coaxially mounted in a shaft portion of a self-timer charging lever, and a lens stopping-down operation is carried out by pushing the stop button into a predetermined depressed position when the self-timer charging lever is located at its return position, and a mirror-up operation is carried out at that stop-down condition by turning the self-timer charging lever a predetermined angle in the opposite direction to that effecting self-timer charging operation. A return movement of the stop button is prevented by locking the stop button at a depressed position once manual depression of the stop button is completed to make it impossible for the stop button to move in the spring biased return thrust direction. The stop button is returned by manually turning the self-timer charging lever in the opposite direction to that determining the mirror-up condition of the camera to return position and the manual operation of the self-timer charging lever to accomplish mirror-up operation is rendered impossible unless the stop button is in depressed position.
REFERENCES:
patent: 3442192 (1969-05-01), Sato
patent: 3581642 (1971-06-01), Nomura et al.
patent: 3640202 (1972-02-01), Nomura
patent: 3829872 (1974-08-01), Ueda et al.
patent: 3893141 (1975-07-01), Uno et al.
Asahi Kogaku Kogyo Kabushiki Kaisha
Gonzales John
LandOfFree
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