Patent US3555985A successfully refreshed from Google Patents.
US3555985A
Expired / Lapsed
US
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Single-blade shutter camera with an exposure meter interlocking mechanism
Assignee: Minolta Co Ltd
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Filing: 1967-12-28
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Granted: 1971-01-19
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Expires: 1987-12-28
Abstract
Abstract A camera with a built-in exposure meter having a single-blade shutter, comprising an exposure meter interlocking mechanism including first and second members, each having a notch to form a lens aperture in a cooperative manner. The first member has a cam surface engageable with the pointer of the exposure meter to sense the position thereof, to control the shutter speed by mechanical engagement of an abutment member of the shutter blade with the first member. The momentum of the first member is regulated by the engagement of the cam surface with the pointer, while the displacement of the second member is adapted to be responsive to the momentum of the first member, so that the lens aperture is also controlled by the position of the pointer.
Inventors
- 👤 Hiroshi Ueda
- 👤 Hideo Takeuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:41
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
152 words
A camera comprising a built-in exposure meter including a pointer, a single-blade shutter, and an exposure interlocking mechanism including a first member adapted to be movable in a particular direction and having a cam surface to engage the pointer of said exposure meter so as to control the momentum of the first member responsive to the position of said pointer engaged with said cam surface, said first member being provided with a notch for controlling lens aperture, and a second member coupled directly to said first member to pivot through an angle corresponding to the momentum of said first member, said second member being provided with a notch for controlling lens aperture together with said notch of the first member responsive to the operative position of the pointer, said shutter blade including an abutment member engageable with said first member to regulate shutter speed responsive to the operative position of the pointer.
Claim 2
Dependent Claim
152 words
A camera comprising a built-in exposure meter including a pointer, a single-blade shutter, and an exposure interlocking mechanism including a first member adapted to be movable in a particular direction and having a cam surface to engage the pointer of said exposure meter so as to control the momentum of the first member responsive to the position of said pointer engaged with said cam surface, said first member being provided with a notch for controlling lens aperture, and a second member coupled directly to said first member to pivot through an angle corresponding to the momentum of said first member, said second member being provided with a notch for controlling lens aperture together with said notch of the first member responsive to the operative position of the pointer, said shutter blade including an abutment member engageable with said first member to regulate shutter speed responsive to the operative position of the pointer.
Claim 3
Dependent Claim
55 words
A camera according to claim 1 wherein said second member has a cam surface and a flat portion adjacent said cam surface to control the shutter speed by the selective engagement of said abutment member of said shutter blade with said cam surface and said flat portion responsive to the operative position of the pointer.
Claim 4
Dependent Claim
69 words
A camera according to claim 1, further comprising a resilient member integrally mounted on said cam surface of said first member, and a pointer receiver having a plurality of semicircular recesses disposed in succession, said resilient member having an arcuate portion extending at the same radius of curvature as the radius of rotation of said pointer to clamp said pointer against said pointer receiver at a semicircular recess thereof.
Claim 5
Dependent Claim
19 words
A camera according to claim 1, further comprising a pointer holding member actuated in conjunction with said first 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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |