Patent US3693523A successfully refreshed from Google Patents.
US3693523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatically winding type photographic camera with a rotary shutter
Assignee: Minolta Co Ltd
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Filing: 1971-02-18
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Granted: 1972-09-26
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Expires: 1991-02-18
Abstract
Abstract The shutter in an automatically winding type photographic camera comprises a rotary shutter which rotates intermittently only in one direction, places the shutter charge into practice while in the process of stopping, and effects the exposure when it rotates. The rotary shaft of the shutter plate in said rotary shutter is supported substantially at its center directly beneath the exposure opening of the camera; the lowermost end of the turning track of said shutter plate is substantially coincided with the bottom of the camera body and the uppermost end thereof is located beneath the eye piece portion of the finder of the camera. In the space beneath said exposure opening there are disposed a shutter driving mechanism having a prime mover for interlocking with said rotary shaft and an automatically winding mechanism for interlocking with said prime mover.
Inventors
- 👤 Shohei Tenkumo
- 👤 Yoshio Kuramoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:54
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42; G03B17/425
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
235 words
In a single lens reflex camera in which a film is transported horizontally in a normal camera position, a combination comprising: a camera body including a rectangular exposure aperture having a dimension in the longitudinal direction of the film greater than the width of the film; an objective lens; a viEw finder system having a focusing plate horizontally disposed above said exposure aperture and a reflecting member for reflecting light passing through the objective lens onto the focusing plate; a blade member pivotally mounted on a shaft which is disposed beneath and near the center of the lower side of said exposure aperture, said blade member being pivotable in a region extending to a location near the bottom of said camera body; a shutter driving mechanism for effecting film exposure by rotating said blade member; a driving motor; a film take-up member; a first transmission for transmitting the movement of the motor to said film take-up member for the film transportation; a second transmission for transmitting the movement of the motor to said shutter driving mechanism and charging the mechanism simultaneously with said film transportation; a shutter release mechanism; and an operating member driven by said driving motor for actuating the shutter releasing member, said shutter driving mechanism, said driving motor, said two transmissions and said operating member being disposed between the lower side of said exposure aperture and the bottom of the camera body.
Claim 2
Dependent Claim
235 words
In a single lens reflex camera in which a film is transported horizontally in a normal camera position, a combination comprising: a camera body including a rectangular exposure aperture having a dimension in the longitudinal direction of the film greater than the width of the film; an objective lens; a viEw finder system having a focusing plate horizontally disposed above said exposure aperture and a reflecting member for reflecting light passing through the objective lens onto the focusing plate; a blade member pivotally mounted on a shaft which is disposed beneath and near the center of the lower side of said exposure aperture, said blade member being pivotable in a region extending to a location near the bottom of said camera body; a shutter driving mechanism for effecting film exposure by rotating said blade member; a driving motor; a film take-up member; a first transmission for transmitting the movement of the motor to said film take-up member for the film transportation; a second transmission for transmitting the movement of the motor to said shutter driving mechanism and charging the mechanism simultaneously with said film transportation; a shutter release mechanism; and an operating member driven by said driving motor for actuating the shutter releasing member, said shutter driving mechanism, said driving motor, said two transmissions and said operating member being disposed between the lower side of said exposure aperture and the bottom of the camera body.
Claim 3
Dependent Claim
112 words
A single lens reflex camera as set forth in claim 1 wherein said shutter driving mechanism comprises: a gear driven through the second transmission by the driving motor and connected to a coil spring for charging said coil spring; a shaft having a driving gear being connected to said coil spring and a restraining plate, said shaft loosely extending through said coil spring and said gear for charging said coil spring; a restraining member being biased for engaging with said restraining plate and movable to release said restraining plate through the shutter release operation; and a leading shutter blade engaged with said driving gear for initiating the exposure in said blade member.
Claim 4
Dependent Claim
140 words
A single lens reflex camera as set forth in claim 2 wherein said shutter driving mechanism further comprises: a second gear driven through the second transmission by the driving motor and connected to a second coil spring for charging said second coil spring; a second shaft having a second driving gear being connected to said second coil spring and a second restraining plate, said second shaft loosely extending through said second coil spring and said second gear for charging said second coil spring; a second restraining member movable between a restraining position for engaging with said second restraining plate to a rest position for releasing said engagement which is actuated through a timing device after said leading shutter blade is released; and a following shutter blade engaged with said second driving gear for shielding the exposure in said blade member.
Claim 5
Dependent Claim
97 words
A single lens reflex camera as set forth in claim 1, further comprising: a manually rotated member connected to the film take-up member; a main shaft rotatably mounted in said camera, the rotation thereof being transmitted to said film take-up member through the first transmission and being transmitted to the shutter driving mechanism through the second transmission; and a clutch means provided between the driving motor and said main shaft for transmitting the rotation of said driving motor to said main shaft and intercepting the transmission of the rotation of said main shaft to said driving motor.
Claim 6
Dependent Claim
174 words
A single lens reflex camera as set forth in claim 4, further comprising: a gear connected with the driving motor through the clutch means, and fitted on the main shaft; a sun gear fixed to said gear coaxially for being fitted on said main shaft; a planet gear meshed with said sun gear and fixed to said main shaft; a cylinder fitted on said main shaft coaxially with said sun gear, which has a cam formed on one end face thereof and an internal gear being meshed with said planet gear; and an automatic release lever pivoted on said camera so that oNe arm thereof is frictionally engaged with said cam for retaining the rotation of said cylinder while the film is wound, and for releasing the rotation of said cylinder against said friction when the film winding is finished to suspend the rotation of said main shaft and to move said automatic release lever, the other arm of which is engageable with an intermediate release lever connected to a manually operated release button.
References Cited (Backward Citations)
US2742834A
Cited
US3005377A
Cited
US3084606A
Cited
US3251287A
Cited
US3257923A
Cited
US3448670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |