Patent
1978-02-03
1980-10-28
Griffin, Donald A.
350257, 354272, G03B 702, G03B 902, G03B 1700
Patent
active
042304032
ABSTRACT:
An interchangeable lens assembly for a camera including a lens barrel having a diaphragm mechanism mounted therewith, a bayonet coupling mechanism fixed on the lens barrel and adapted to be brought into engagement with a complementary coupling mechanism on the camera for releasably mounting the lens assembly in operative position on the camera, an adapter shell mounted on the lens barrel in rotative relationship relative thereto for establishing predetermined relative positioning between the interchangeable lens assembly and the camera, and a retainer mechanism adapted to be interposed between the adapter shell and the camera for retaining the adapter shell in fixed rotative position relative to the camera during mounting and dismounting of the interchangeable lens assembly. The lens assembly also includes a diaphragm presetting mechanism for transmitting signals representative of a diaphragm aperture between the lens assembly and the camera. Since coupling and decoupling of the lens assembly is performed by rotating the lens barrel relative to the camera housing, while the adapter shell remains stationary, the diaphragm presetting mechanism is provided with a device for assuring that an arm extending between the camera and the lens assembly is located in a predetermined angular position relative to a slot in the stationary adapter shell before and after the unit is attached to and detached from the camera housing despite the fact that the range of rotative tightening movement of the tube may be larger or smaller than that of movement of the arm. Thus the operator is able to detach the unit with the position of the diaphragm ring left unchanged.
REFERENCES:
patent: 3067665 (1962-12-01), Gebele et al.
patent: 3388647 (1968-06-01), Yajima
patent: 3675550 (1972-07-01), Ishizaka
patent: 3722390 (1973-03-01), Schlapp et al.
patent: 3864707 (1975-02-01), Shirasaki
patent: 3906534 (1975-09-01), Shirasaki
patent: 4003068 (1977-01-01), Hashimoto et al.
Aoyagi Masao
Hashimoto Shigeru
Isobe Takashi
Mitani Taizo
Sumi Akiyasu
Canon Kabushiki Kaisha
Griffin Donald A.
LandOfFree
Mounting for interchangeable camera lens assembly with diaphragm does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mounting for interchangeable camera lens assembly with diaphragm, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mounting for interchangeable camera lens assembly with diaphragm will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-265662