US3608460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Built-in exposure meter of single lens reflex camera
Assignee: Nikon Corp
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Filing: 1969-02-24
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Granted: 1971-09-28
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Expires: 1989-02-24
Abstract
Abstract A SINGLE LENS REFLEX CAMERA HAVING A BUILT-IN EXPOSURE METER AND HAVING THE LIMITED SPACE DUE TO THE NECESSARILY LARGE HOUSING FOR THE ROTATABLE MIRROR UTILIZES THE SPACE AT THE BOTTOM OF THE CAMERA, BETWEEN THE BOTTOM WALL OF THE CAMERA AND THE BOTTOM WALL OF THE MIRROR HOUSING, FOR THE LOCATION OF THE VARIABLE RESISTOR AND ITS COOPERABLE BRUSH CONTACT IN THE CIRCUIT OF THE EXPOSURE METER. THE RESISTOR AND BRUSH ARE EACH MOUNTED ON A GEAR. ONE GEAR IS COOPERABLE WITH THE CAMERA''S STOP SETTING MEMBER AND THE OTHER GEAR IS COOPERABLE WITH THE SHUTTER SPEED SETTING MEMBER.
Inventors
- 👤 Jun Shimomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:13
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B19/12; G03B7/00; G03B7/04; G03B7/08; G03B7/099; G03B7/0993; G03B7/0997; G03B7/09971; G03B7/09972; G03B7/09977
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |