1992-10-27
1993-11-30
Hayes, Monroe H.
354248, G03B 940
Patent
active
052669939
ABSTRACT:
A focal-plane shutter apparatus comprises a first plate located on a film-plane side of a mirror box, a second plate located on a film-plane side of the first plate, a third plate located on an opposite side of the first plate to the film-plane side thereof, a vane group comprising a plurality of light shielding thin plates contained between the first plate and the second plate, and a drive arm contained between the first plate and the second plate to drive the vane group, the third plate having a mount portion which is to be fixed to the first plate, a shaft fixed to the third plate, a shutter drive lever rotatably fit to the shaft at one end and connected to the drive arm at an other end, and an urging device for urging the shutter drive lever in a direction of drive of the vane group, in which the first plate has a support portion to support the one end of the shaft and a hole portion for transmitting a displacement of the shutter drive lever to the drive arm.
REFERENCES:
patent: 4493544 (1985-01-01), Uematsu
patent: 4814807 (1989-03-01), Nakagawa et al.
patent: 5019847 (1991-05-01), Tanabe
Hayes Monroe H.
Nikon Corporation
LandOfFree
Focal-plane shutter apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Focal-plane shutter apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Focal-plane shutter apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2100418