Automatic aperture driving mechanism

Details Automatic aperture driving mechanism Automatic aperture driving mechanism

1978-11-24

1980-08-19

Hix, L. T.

G03B 902

Patent

active

042181216

ABSTRACT:
An automatic aperture driving mechanism for a camera, comprising an aperture control ring, a regulating means adapted to regulate the aperture control ring in the aperture closing direction, a reset driving means engaging the aperture control ring and a motor, an aperture ring, and an aperture driving lever operatively connected to the aperture ring and adapted to be moved together with the aperture controlling ring. The reset driving means has a gear train including gears having non-toothed portions so that the power transmitting connection of the gear train may be broken. The regulating means includes a pawl adapted to directly engage the aperture control ring so as to hold the latter in the aperture opening position, a ratchet wheel shunting from the gear train, and a regulating pawl engageable with the ratchet wheel and adapted to regulate the condition of the aperture upon engagement with the ratchet wheel.

REFERENCES:
patent: 3133488 (1964-05-01), Fritz
patent: 3909833 (1975-09-01), Sorimachi et al.
patent: 4099188 (1978-07-01), Uno et al.

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