Patent US3630133A successfully refreshed from Google Patents.
US3630133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-lens reflex camera having a device for indicating adjusted exposure value in the finder
Assignee: Nikon Corp
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Filing: 1968-05-09
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Granted: 1971-12-28
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Expires: 1988-05-09
Abstract
Abstract A single-lens reflex camera is provided with at least two interchangeable viewfinders wherein exposure factors, such as shutter speed, aperture opening and the like, may be observed along the edges of the viewing screen. With one viewfinder positioned on the mirror box of the camera, an inverse image of the object is observed, and with the other viewfinder in place, an erected image of the object is observed. A viewing screen is provided with exposure indicia so arranged that an erected image of the indicia is observed in both of the viewfinders.
Inventors
- 👤 Jun Shimomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:13
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/003; G03B19/00; G03B19/02; G03B19/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
165 words
A single-lens reflex camera having an objective lens, a reflecting mirror and a viewing screen, in which the image formed on the screen by the objective is inverse of the object to be photographed, the improvement comprising at least two types of interchangeable viewfinders, the first viewfinder for observing the image on the screen as an inverse image and the second viewfinder for observing the image on the finder screen as an erect image, the interchangeable viewfinders and the screens being removable from the camera body; an index movable along the periphery of the viewfinder screen; an exposure-adjusting means on said camera and interlocked with said index; a first scale consisting of characters of the erect image provided oN the finder screen, and a second scale consisting of characters of the inverse image provided on the finder screen; the index cooperating with the first scale when the first finder is used and the index cooperating with the second scale when the second finder is used.
Claim 2
Dependent Claim
165 words
A single-lens reflex camera having an objective lens, a reflecting mirror and a viewing screen, in which the image formed on the screen by the objective is inverse of the object to be photographed, the improvement comprising at least two types of interchangeable viewfinders, the first viewfinder for observing the image on the screen as an inverse image and the second viewfinder for observing the image on the finder screen as an erect image, the interchangeable viewfinders and the screens being removable from the camera body; an index movable along the periphery of the viewfinder screen; an exposure-adjusting means on said camera and interlocked with said index; a first scale consisting of characters of the erect image provided oN the finder screen, and a second scale consisting of characters of the inverse image provided on the finder screen; the index cooperating with the first scale when the first finder is used and the index cooperating with the second scale when the second finder is used.
Claim 3
Dependent Claim
43 words
A single-lens reflex camera according to claim 1, wherein said two scales are provided on two sides of one viewfinder screen, the position of a scale relative to the camera body being dependent upon the positioning of the screen on the camera body.
Claim 4
Dependent Claim
17 words
A single-lens reflex camera according to claim 1, wherein the respective viewfinder retains the respective viewfinder screen.
Claim 5
Dependent Claim
33 words
A single-lens reflex camera according to claim 3, wherein the position of the respective viewfinder screen relative to the camera body can be changed when the viewfinder screen is mounted on the viewfinder.
Claim 6
Dependent Claim
26 words
A single-lens reflex camera according to claim 2, wherein the mounting position of the viewfinder screen relative to the camera body is indicated on the screen.
Claim 7
Dependent Claim
21 words
A single-lens reflex camera according to claim 4, wherein the mounting position of the viewfinder screen on the viewfinder is indicated.
Claim 8
Dependent Claim
33 words
A single-lens camera according to claim 1, wherein resilient means is provided to bias the mounted viewfinder screen in a longitudinal direction of the scale to hold the screen on the camera body.
Claim 9
Dependent Claim
57 words
A single-lens reflex camera according to claim 2, wherein each of the interchangeable viewfinders comprises a body portion for insertion into the mirror box of the camera, opposing longitudinal grooves in the lower part of the body portion, and wherein the viewfinder screen is provided with longitudinal grooves for slidable mounting the screen on the viewfinder body.
Claim 10
Dependent Claim
57 words
A single-lens reflex camera according to claim 4, wherein each of the interchangeable viewfinders comprises a body portion for insertion into the mirror box of the camera, opposing longitudinal grooves in the lower part of the body portion, and wherein the viewfinder screen is provided with longitudinal grooves for slidably mounting the screen on the viewfinder body.
References Cited (Backward Citations)
DE1099840B
Cited
US3393623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |