Patent
1983-08-05
1985-05-21
Gonzales, John
G03B 902
Patent
active
045182388
ABSTRACT:
An interchangeable objective with a variable lens aperture for a camera has a stationary support member and a diaphragm-operating member rotatable about an axis between first and second annular positions relative to the stationary support member. A first elongated leaf spring is mounted on the stationary member to bear against the diaphragm-operating member along a first plane perpendicular to the axis. A second elongated leaf spring is mounted on the stationary member to bear against the diaphragm-operating member along a second plane perpendicular to the axis. The second plane is spaced from the first plane in the direction of the axis. A locking groove is formed in the diaphragm-operating member so as to alternatively receive the first and second leaf springs in locking engagement when the diaphragm-operating member is positioned at the first and second angular positions, respectively. An unlocking button is mounted in the diaphragm-operating member over the locking groove to push the respective first and second leaf springs out of engagement with the locking groove upon depression of the unlocking button.
REFERENCES:
patent: 2878738 (1959-03-01), Uhland
patent: 3135185 (1964-06-01), Grosjean
Asahi Kogaku Kogyo Kabushiki Kaisha
Gonzales John
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