Photography – Camera detail – Shutter
Reexamination Certificate
2005-05-31
2005-05-31
Nguyen, Judy (Department: 2851)
Photography
Camera detail
Shutter
C396S456000
Reexamination Certificate
active
06899473
ABSTRACT:
A focal plane shutter for cameras is provided with a shutter blade which can be actuated to both directions for opening and for closing a photographing optical path by an electromagnetic apparatus. When a rotor is rotated to the direction corresponding to the direction of conduction of coils an actuating member which is formed in one with the rotor make arms rotate by its actuating pin and actuates four blades of the shutter blade about upward and downward direction. A brake member rotatably arranged together with on a friction plate on a shaft has bent portions formed near tip portions of the arm portions which are inserted in a slot on a shutter base plate. An operation for opening the shutter blade is braked by the actuating pin contacting, pressing and moving one of the bent portions at termination stage, and a closing operation is braked by the actuating pin contacting, pressing and moving another bent portion at the termination stage. Thus the shutter blade can be braked suitably at the termination stage and stopped early.
REFERENCES:
patent: 5664247 (1997-09-01), Hasuda et al.
patent: 58-196527 (1983-11-01), None
patent: 1-304437 (1989-12-01), None
patent: 9-236845 (1997-09-01), None
patent: 10-221744 (1998-08-01), None
patent: 2001-188280 (2001-07-01), None
Inoue Nobuyoshi
Kudo Kouichi
Nguyen Judy
Nidec Copal Corporation
Pillsbury & Winthrop LLP
Smith Arthur A
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