Electromagnetic shutter for camera

Details Electromagnetic shutter for camera Electromagnetic shutter for camera

1988-10-27

1990-04-17

Adams, Russell E.

354435, 3541951, G03B 300

Patent

active

049184806

ABSTRACT:
An electromagnetic shutter of a camera in which a lens is moved to a focal position by a rotation of a single reversible motor in one direction and the exposure control is effected by the reverse rotation of the same motor in the opposite direction, including a first rotating member which is continuously associated with the rotation of the reversible motor in the forward and reverse directions, a second rotating member which comes into contact with the first rotating member at a specific rotational position to rotate together when first rotating member rotates in the forward direction, a focus adjusting lens barrel which moves in the optical axis direction in association with the rotation of the second rotating member, a lens shutter which is supported by the second rotating member and which is opened and closed by the relative rotation of the first rotating member with respect to the second rotating member, a one-way clutch which allows the second rotating member to rotate only in one direction from its initial position into its terminal end position, and a device for releasing the one-way clutch means when the second rotating member reaches its terminal end position.

REFERENCES:
patent: 4295715 (1981-10-01), Breen
patent: 4360258 (1982-11-01), Hashimoto
patent: 4634254 (1987-01-01), Ogihara et al.
patent: 4695144 (1987-09-01), Yoshino et al.
patent: 4696559 (1987-09-01), Kondo
patent: 4779114 (1988-10-01), Kobayashi
patent: 4799077 (1989-01-01), Kaplan et al.

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