Position control device for use in a camera

Details Position control device for use in a camera Position control device for use in a camera

1987-11-20

1989-05-30

Griffin, Donald A.

3542711, G03B 1912

Patent

active

048355585

ABSTRACT:
A position control device which comprises a ratch wheel adapted to rotate in interlock with motion of an object to be positioned, a rotation detecting unit adapted to detect an amount of rotation of the ratch wheel, a combination solenoid provided with a pawl and adapted to be driven in a direction of bringing the pawl into engagement with the ratch wheel and in a direction of separating the pawl from the ratch wheel, and a combination solenoid control unit adapted to actuate the aforementioned combination solenoid in such a manner as to bring the pawl into engagement with the ratch wheel to set the object at a prescribed position when the aforementioned rotation detecting unit detects that the amount of the rotation of the ratch wheel has reached a prescribed level.

REFERENCES:
patent: 3135182 (1964-06-01), Hintze et al.
patent: 3404614 (1968-10-01), Naumann
patent: 3613542 (1971-10-01), Wiessner
patent: 3640201 (1972-02-01), Kimura
patent: 3842587 (1974-10-01), Strauss et al.
patent: 3849787 (1974-11-01), Nakagawa
patent: 4312581 (1982-01-01), Miyagawa et al.
patent: 4443083 (1984-04-01), Nakano
patent: 4512647 (1985-04-01), Yamazaki
patent: 4720720 (1988-01-01), Araki et al.

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