US4101912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data recording device for camera
Assignee: Canon Inc
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Filing: 1976-08-18
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Granted: 1978-07-18
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Expires: 1996-08-18
Abstract
Abstract A data recording device for a single reflex camera has a demountable view finder in which a data signal from a source is guided by optical means along a data recording optical path and divided, for viewing and entering the camera.
Inventors
- 👤 Yoshiaki Watanabe
- 👤 Akio Sunouchi
- 👤 Youichi Okuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:29
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/18; G03B17/20; G03B17/24; G03B2217/00; G03B2217/24; G03B2217/242; G03B2217/243; G03B2217/246
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
A data recording device for a camera having a body with a film plane and having an interchangeable finder with a body detachably mounted on the camera body, comprising: a data illumination device in the finder body, a data signal source provided in the finder body, first optical path forming means forming a first optical path in the finder body, and second optical path forming means forming a second optical path in the camera body, said first and second optical path forming means are aligned to produce an optical path for passage of a signal light beam from the data signal source to the film plane in the camera when the finder body is mounted on the camera.
Claim 2
Dependent Claim
118 words
A data recording device for a camera having a body with a film plane and having an interchangeable finder with a body detachably mounted on the camera body, comprising: a data illumination device in the finder body, a data signal source provided in the finder body, first optical path forming means forming a first optical path in the finder body, and second optical path forming means forming a second optical path in the camera body, said first and second optical path forming means are aligned to produce an optical path for passage of a signal light beam from the data signal source to the film plane in the camera when the finder body is mounted on the camera.
Claim 3
Dependent Claim
29 words
A data recording device for a camera in accordance with claim 1, further comprising an optical means for conducting the data signal light beam to the finder optical path.
Claim 4
Dependent Claim
92 words
A data recording device according to claim 1, wherein said second optical path forming means forms a light inlet to the second optical path in the camera body, said recording device further comprising light shading means for covering the inlet of the second optical path, said covering means being movably mounted on the camera body and engaging with the finder body when the body is mounted on the camera body so that said covering means is retracted from its covering position to align the first optical path with the second optical path.
References Cited (Backward Citations)
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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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |