US4352548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera having a variable program exposure control device
Assignee: Nikon Corp
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Filing: 1981-04-23
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Granted: 1982-10-05
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Expires: 2001-04-23
Abstract
Abstract In a camera of the interchangeable lens type having a body having a program exposure control device and a lens mount; and an interchangeable lens mounted on the body through the mount, there is provided program varying means in the program exposure control device, information means on the interchangeable lens, and interlock means for setting the program varying means so that when the interchangeable lens is mounted on the body, the program varying means selects a program corresponding to the information possessed by the information means.
Inventors
- 👤 Kenji Toyoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:17
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/20; G03B7/08; G03B7/081; G03B7/087
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
157 words
In a camera of the interchangeable lens type having a program exposure control device which is so programmed that a combination of shutter speed and aperture value may be determined according to the brightness of the object to be photographed and film speed and a lens mount; and an interchangeable lens mounted detachably on said body through said mount, the improvement comprising: (a) program varying means provided in said program exposure control device, the program of said program exposure control device being capable of being arbitrarily selected by the setting of said program varying means; (b) information means provided on said interchangeable lens, the information possessed by said information means corresponding to the main usage of photography of the lens; and (c) interlock means for setting said program varying means so that when said interchangeable lens is mounted on said body, said program varying means selects a program corresponding to the information possessed by said information means.
Claim 2
Dependent Claim
157 words
In a camera of the interchangeable lens type having a program exposure control device which is so programmed that a combination of shutter speed and aperture value may be determined according to the brightness of the object to be photographed and film speed and a lens mount; and an interchangeable lens mounted detachably on said body through said mount, the improvement comprising: (a) program varying means provided in said program exposure control device, the program of said program exposure control device being capable of being arbitrarily selected by the setting of said program varying means; (b) information means provided on said interchangeable lens, the information possessed by said information means corresponding to the main usage of photography of the lens; and (c) interlock means for setting said program varying means so that when said interchangeable lens is mounted on said body, said program varying means selects a program corresponding to the information possessed by said information means.
Claim 3
Dependent Claim
17 words
The camera according to claim 1, wherein said information means possesses said information as a mechanical quantity.
Claim 4
Dependent Claim
18 words
The camera according to claim 2, wherein said information means is a member fixed to said interchangeable lens.
Claim 5
Dependent Claim
51 words
The camera according to claim 3, wherein said program varying means varies the resistance value determining the program characteristic of said program exposure control device, and said interlock means selects said resistance value corresponding to the position of said fixed member when said interchangeable lens has been mounted on said body.
Claim 6
Dependent Claim
56 words
The camera according to claim 4, wherein said program varying means is a slidable piece of variable resistance, and said interlock means is provided integrally with said slidable piece and engageable with said fixed member in response to the mounting of said interchangeable lens to relate the position of said slidable piece to said fixed member.
Claim 7
Dependent Claim
46 words
The camera according to claim 5, wherein said member is fixed to said lens so that it is projected into said mount when said lens is mounted on said body, and said interlock means is provided in said body so as to engage said fixed member.
Claim 8
Dependent Claim
61 words
The camera according to claim 6, wherein said interlock means has an engaging member engaged with said fixed member and a spring for biasing said engaging member in one direction, and the direction of bias of the spring is determined so that when said lens is mounted, said fixed member moves said engaging member against the biasing force of said spring.
Claim 9
Dependent Claim
40 words
The camera according to claim 7, wherein said information means is a lever provided on a zoom lens as said interchangeable lens, and said lever changes its position in response to adjustment of the focal length of said zoom lens.
Claim 10
Dependent Claim
17 words
The camera according to claim 1, wherein said information means possesses said information as an electrical quantity.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |