Patent US4135801A successfully refreshed from Google Patents.
US4135801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera having film winding-to-rewinding control by releasing either of two buttons
Assignee: Canon Inc
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Filing: 1977-03-15
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Granted: 1979-01-23
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Expires: 1997-03-15
Abstract
Abstract In a photographic camera for use with a single-reel magazine wherein the film after withdrawn by a film advancing sprocket for exposure purposes has to be transported backwards to the magazine while the sprocket being idle, a mechanism for releasing the sprocket from braking engagement with a drive member therefor is provided with two control or rewinding buttons arranged to be manually actuable from the outside of the camera housing at respective places, one of which is located in a recess of the bottom panel thereof so that, for example, when a motor drive unit is attached thereto, an automatic responding relationship is established therebetween, and another place which is located so that, while the user is unabled to make use of the first-named rewinding button, as, for example, a tripod remains left in attachment with the camera at its bottom panel, it is made possible to switch the camera from the film winding to the rewinding state.
Inventors
- 👤 Akio Sunouchi
- 👤 Susumu Kozuki
- 👤 Yoshiaki Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:15
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42; G03B17/425
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
In a camera provided with a film winding-up device including a film transporting sprocket and with a film rewinding device, a changeover device for controlling film winding-up and rewinding operation comprises; (a) clutch means arranged between said sprocket and a film winding-up drive mechanism, (b) first actuating means positioned on the bottom panel of the camera housing to connect and disconnect said clutch means; and (c) second actuating means positioned on the upper panel of the camera housing for operating said clutch means, whereby said clutch means is disconnected by any one of said actuating means so that the sprocket is rendered freely rotative for film rewinding purposes.
Claim 2
Dependent Claim
108 words
In a camera provided with a film winding-up device including a film transporting sprocket and with a film rewinding device, a changeover device for controlling film winding-up and rewinding operation comprises; (a) clutch means arranged between said sprocket and a film winding-up drive mechanism, (b) first actuating means positioned on the bottom panel of the camera housing to connect and disconnect said clutch means; and (c) second actuating means positioned on the upper panel of the camera housing for operating said clutch means, whereby said clutch means is disconnected by any one of said actuating means so that the sprocket is rendered freely rotative for film rewinding purposes.
Claim 3
Dependent Claim
38 words
A camera according to claim 1, wherein said camera is attachable to a motor drive unit for film winding-up and rewinding purposes, and one of said actuating means is connectable to changeover means of said motor drive unit.
Claim 4
Dependent Claim
103 words
In a camera provided with a film winding-up device including a film transporting sprocket and with a film rewinding device, a changeover device for controlling film winding-up and rewinding operation comprises; (a) clutch means arranged between said sprocket and a film winding-up drive mechanism, (b) two actuating means for operating the clutch means, one of said actuating means being arranged on the bottom panel of the camera, and the other being arranged on another panel of the camera, whereby said clutch means is disconnected by any one of said actuating means so that the sprocket is rendered freely rotative for film rewinding purposes.
Claim 5
Dependent Claim
103 words
In a camera provided with a film winding-up device including a film transporting sprocket and with a film rewinding device, a changeover device for controlling film winding-up and rewinding operation comprises; (a) clutch means arranged between said sprocket and a film winding-up drive mechanism, (b) two actuating means for operating the clutch means, one of said actuating means being arranged on the bottom panel of the camera, and the other being arranged on another panel of the camera, whereby said clutch means is disconnected by any one of said actuating means so that the sprocket is rendered freely rotative for film rewinding purposes.
Claim 6
Dependent Claim
38 words
A camera according to claim 3, wherein said camera is attachable to a motor drive unit for film winding-up and rewinding purposes, and one of said actuating means is connectable to changeover means of said motor drive unit.
References Cited (Backward Citations)
US3485156A
Cited
US4012755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |