Aperture/shutter system and a stepper motor for use therein

Details Aperture/shutter system and a stepper motor for use therein Aperture/shutter system and a stepper motor for use therein

1998-12-08

2000-01-25

Perkey, W. B.

Photography

Camera detail

Shutter

310 89, 310 91, 310156, 310261, G03B 908, H02K 127, H02K 500, H02K 2112

Patent

active

060171561

ABSTRACT:
An aperture/shutter system defining an optical path comprises a shutter mechanism operable at a first state to selectively block light along the optical path and a second state to allow light along the optical path; and a motor including a stator and an annular rotor. The rotor is rotably supported within the stator by a support that is (i) stationary with respect to the stator and (ii) engages an inner surface of the rotor. The rotor is coupled to the shutter mechanism to move the shutter mechanism between the first state and the second state.

REFERENCES:
patent: 4005448 (1977-01-01), Iwata et al.
patent: 4534624 (1985-08-01), Toda et al.
patent: 4596449 (1986-06-01), Iwata et al.
patent: 4693580 (1987-09-01), Hanamori et al.
patent: 4695144 (1987-09-01), Yoshino et al.
patent: 4828360 (1989-05-01), Maruyama
patent: 5747897 (1998-05-01), Iwasa et al.
patent: 5790903 (1998-08-01), Iwasaki et al.

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