US3864707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interchangeable lens with a stop preset device
Assignee: Canon Inc
•
Filing: 1973-08-27
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Granted: 1975-02-04
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Expires: 1993-08-27
Abstract
Abstract An interchangeable lens is provided with a stop preset device wherein a preset operating member in its manual stop operating region controls a preset control member and the preset operating member in its automatic aperture operating region does not perform such control but the preset control member is controlled in response to an exposure meter. The lens has means for blocking movement of the preset operating member from one of the operating regions to the other, and means for releasing the blocking means.
Inventors
- 👤 Takayuki Shirasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:41
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/02; G03B9/07
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
139 words
Aan interchangeable lens for a camera provided with a stop preset device, comprising: a variable aperture stop; a cam member for presetting said stop; a member for automatic stop presetting, said member being engageable with said cam member; a manually operating member having a manual stop presetting position range, wherein said cam member is adjusted by said manually operating member, and an automatic stop presetting position wherein said cam member is freed from said manually operating member and is caused to be subject to adjustment through said automatic stop presetting member, by an exposure meter provided in the camera; means for limiting said operating member to positions within the manual stop presetting position range, and means for releasing said operating member from the limiting means and permitting the operating member to be shifted to the automatic stop presetting position.
Claim 2
Dependent Claim
139 words
Aan interchangeable lens for a camera provided with a stop preset device, comprising: a variable aperture stop; a cam member for presetting said stop; a member for automatic stop presetting, said member being engageable with said cam member; a manually operating member having a manual stop presetting position range, wherein said cam member is adjusted by said manually operating member, and an automatic stop presetting position wherein said cam member is freed from said manually operating member and is caused to be subject to adjustment through said automatic stop presetting member, by an exposure meter provided in the camera; means for limiting said operating member to positions within the manual stop presetting position range, and means for releasing said operating member from the limiting means and permitting the operating member to be shifted to the automatic stop presetting position.
Claim 3
Dependent Claim
44 words
An interchangeable lens according to claim 1, further comprising means for switching the exposure meter to a position for automatic stop control, in response to the shifting of said operating member from the manual stop presetting position range to the automatic stop presetting position.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |