US3891992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single lens reflex camera
Assignee: Minolta Co Ltd
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Filing: 1974-02-08
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Granted: 1975-06-24
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Expires: 1994-02-08
Abstract
Abstract A single lens reflex camera comprises a movable reflecting mirror biased to a viewing position; a diaphragm operating means provided in the camera body for urging a diaphragm unit, provided in an interchangeable lens mounted on the camera body, against a below-mentioned tendency of said diaphragm unit to maintain the diaphragm in a released position, said diaphragm unit being urged in a closing direction. There is provided an air damper which is interconnected with a member for shifting the movable reflecting mirror from the viewing position to the picture taking position prior to the shutter release, and for driving the diaphragm operating means in closing direction prior to the aforesaid shutter release.
Inventors
- 👤 Hiroshi Ueda
- 👤 Yoshio Kuramoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:28
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/20; G03B19/00; G03B19/02; G03B19/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
229 words
A single lens reflex camera comprising: a reflecting mirror movable between a viewing position and a picture taking position and urged to assume said viewing position; a reflecting mirror operating member for shifting said mirror, said operating member being movable between a first position and a second position in which said mirror assumes said viewing and picture taking positions respectively; an interchangeable lens removably mounted on said camera and having a diaphragm; a diaphragm operating member engaging said diaphragm and movable between a first position in which said diaphragm is brought to its open position, against a tendency thereof to close, and a second position in which said diaphragm is allowed to close to a minimum aperture; means urging said diaphragm from its open position to its closing position; means urging said diaphragm operating member to said first position; an actuating member movable between a cocked position and a rest position, to urge said reflecting mirror operating member and said diaphragm operating member from said first position to said second position respectively; means for locking said actuating member in the cocked position and unlocking the same in association with a shutter release operation; and an air damper for decelerating the movement of said actuating member, said air damper including a cylinder supported by the camera body and a piston slidable within said cylinder and interconnected with said actuating member.
Claim 2
Dependent Claim
229 words
A single lens reflex camera comprising: a reflecting mirror movable between a viewing position and a picture taking position and urged to assume said viewing position; a reflecting mirror operating member for shifting said mirror, said operating member being movable between a first position and a second position in which said mirror assumes said viewing and picture taking positions respectively; an interchangeable lens removably mounted on said camera and having a diaphragm; a diaphragm operating member engaging said diaphragm and movable between a first position in which said diaphragm is brought to its open position, against a tendency thereof to close, and a second position in which said diaphragm is allowed to close to a minimum aperture; means urging said diaphragm from its open position to its closing position; means urging said diaphragm operating member to said first position; an actuating member movable between a cocked position and a rest position, to urge said reflecting mirror operating member and said diaphragm operating member from said first position to said second position respectively; means for locking said actuating member in the cocked position and unlocking the same in association with a shutter release operation; and an air damper for decelerating the movement of said actuating member, said air damper including a cylinder supported by the camera body and a piston slidable within said cylinder and interconnected with said actuating member.
Claim 3
Dependent Claim
56 words
A single lens reflex camera as defined in claim 1, wherein there is provided means for releasing a shutter after said actuating member has driven said reflecting mirror operating member and diaphragm operating member from the first position to the second position in association with the shutter release operation and under deceleration by said air damper.
Claim 4
Dependent Claim
47 words
A single lens reflex camera as defined in claim 1, wherein there is provided means for shifting said actuating member from the rest position to the cocked position after the termination of the exposure by movement of the shutter which has been released by the release operation.
Claim 5
Dependent Claim
51 words
A single lens reflex camera as defined in claim 1, further comprising: a reflecting mirror manipulating member for manually shifting said reflecting mirror operating member from the first position to the second position against the tendency thereof when said actuating member is locked in the cocked position by said locking means.
Claim 6
Dependent Claim
49 words
A single lens reflex camera as defined in claim 1, further comprising: a diaphragm manipulating member for shifting said diaphragm operating member from the first position to the second position against the tendency thereof when said actuating member is locked in the cocked position thereof by said locking means.
Claim 7
Dependent Claim
115 words
A single lens reflex camera as defined in claim 1, wherein said actuating member is equipped with an actuating lever on which is pivotally supported a connecting lever having a U-shaped hook at one end, and the diaphragm operating member is provided with a pin engageable with said hook, said U-shaped hook being in engagement with said pin to thereby shift said diaphragm operating member from the first position thereof to the second position when the actuating lever is shifted from the cocked position to the rest position, and said pin being loose in said U-shaped hook when said actuating lever is locked by the locking means and said diaphragm manipulating member is in operation.
Claim 8
Dependent Claim
49 words
A single lens reflex camera as defined in claim 1, wherein a resilient member is disposed on the innermost end face of said cylinder, so that when said piston is forced into said cylinder, the inner end face of the piston is brought into abutment with said resilient member.
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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |