Patent US4062028A successfully refreshed from Google Patents.
US4062028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single reflex camera
Assignee: Canon Inc
•
Filing: 1975-07-07
•
Granted: 1977-12-06
•
Expires: 1995-07-07
Abstract
Abstract In a single lens reflux camera an electromagnetic release initiates operation of an automatic diaphragm control, a mirror driver, and a shutter driver, in that order. The electromagnetic release device includes a mechanical output terminal for controling each mechanism and an electric input terminal. The electromagnetic release device is provided in a flat space above the bottom exterior wall of the camera.
Inventors
- 👤 Nobuo Tezuka
- 👤 Masanori Uchidoi
- 👤 Yukio Iura
- 👤 Satoshi Watanabe
- 👤 Masayoshi Yamamichi
- 👤 Hiroshi Aizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:02
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B19/12; G03B7/00; G03B7/08; G03B7/081; G03B7/085
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
154 words
A single lens reflex camera, comprising a camera body having a top wall and a bottom wall, and a mirror box in the camera body, a shutter button, a shutter assembly embracing the mirror box, shutter driving means mounted in said camera body, mirror lifting means mounted in said camera body, automatic diaphragm control means disposed between the mirror box and the bottom wall of the camers body, and an electromagnetic release means having a mechanical output coupled to said automatic diaphragm control means, said automatic diaphrgam control means and said mirror lifting means and said shutter driving means being coupled to each other so that said diaphragm control means and said lifting means and said shutter driving means are initiated in succession in response to said release means, said electromagnetic release means being located in a space above the bottom wall of the camera body and below the level of the mirror box.
Claim 2
Dependent Claim
154 words
A single lens reflex camera, comprising a camera body having a top wall and a bottom wall, and a mirror box in the camera body, a shutter button, a shutter assembly embracing the mirror box, shutter driving means mounted in said camera body, mirror lifting means mounted in said camera body, automatic diaphragm control means disposed between the mirror box and the bottom wall of the camers body, and an electromagnetic release means having a mechanical output coupled to said automatic diaphragm control means, said automatic diaphrgam control means and said mirror lifting means and said shutter driving means being coupled to each other so that said diaphragm control means and said lifting means and said shutter driving means are initiated in succession in response to said release means, said electromagnetic release means being located in a space above the bottom wall of the camera body and below the level of the mirror box.
Claim 3
Dependent Claim
25 words
A single lens reflex camera as in claim 1, wherein said electromagnetic release means includes an electromagnet, and a dust free case surrounding said electromagnet.
Claim 4
Dependent Claim
61 words
A single lens reflex camera as in claim 2, wherein said electromagnetic release means includes an electromagnet and a permanent magnet, said permanent magnet being arranged relative to said electromagnet so that when said electromagnet is magnetized the magnetic flux of the electromagnet and the magnetic flux of the permanent magnet offset each other for activating said automatic diaphragm control unit.
Claim 5
Dependent Claim
23 words
A camera as in claim 1, wherein said electromagnetic release means includes an electromagnet and an electromagnetic shielding member for shielding said electromagnet.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |