US3646832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corded-spring energy control device
Assignee: Ricoh Co Ltd
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Filing: 1970-04-23
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Granted: 1972-03-07
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Expires: 1990-04-23
Abstract
Abstract A device for automatically controlling the elastic energy of a coiled spring when an operation lever pivotally supported by a shaft and normally urged in one direction by one end of the coiled spring is caused to move in the other direction against the biasing force of the spring. The device comprises means to relieve the other end of the coiled spring when the operation lever is moved in the other direction as aforementioned so as to thereby restrict an increase in the elastic energy of the coiled spring.
Inventors
- 👤 Ban Hirafuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:35
CPC Classifications
G; G01; G01N; G01N3/00; G06; G06C; G06C7/00; G06C7/10; G01N2203/00; G01N2203/02; G01N2203/026; G01N2203/0288; G01N2203/0292; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/1892; Y10T74/18936; Y10T74/20; Y10T74/20006; Y10T74/20396; Y10T74/20576; Y10T74/20582
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
111 words
A device for controlling the elastic energy of a coiled spring, comprising an operation lever pivotally supported on a shaft, a member pivotally supported for motion about an axis extending in the same direction as said shaft, a coiled spring having one end engaging said operation lever and the other end engaging said member, connecting means for connecting said operation lever with said member and moving the latter in conjunction with the former as the former is moved in pivotal motion so as to thereby restrict an increase in the elastic energy of said spring, and stop means for restricting the pivotal movement of said operation lever caused by said spring.
Claim 2
Independent Claim
111 words
A device for controlling the elastic energy of a coiled spring, comprising an operation lever pivotally supported on a shaft, a member pivotally supported for motion about an axis extending in the same direction as said shaft, a coiled spring having one end engaging said operation lever and the other end engaging said member, connecting means for connecting said operation lever with said member and moving the latter in conjunction with the former as the former is moved in pivotal motion so as to thereby restrict an increase in the elastic energy of said spring, and stop means for restricting the pivotal movement of said operation lever caused by said spring.
Claim 3
Dependent Claim
70 words
A device for controlling the elastic energy of a coiled spring as in claim 1, wherein said connecting means comprises a first segmental gear fixed to said operation lever for concurrent movement therewith, and a second segmental gear fixed to said member for concurrent movement therewith, said two segmental gears being maintained in meshing engagement with each other, and said operation lever and said member being supported on parallel shafts.
Claim 4
Dependent Claim
130 words
A device for controlling the elastic energy of a coiled spring as in claim 1, wherein said connecting means comprises two segmental gears respectively fixed to said operation lever and said member for concurrent movement therewith, said lever and said member being pivotally supported by the same shaft, and two segmental gears fixed to each other for concurrent movement and supported by a second shaft parallel to said shaft supporting said operation lever and said member, said last-mentioned two segmental gears having different radii of rotation, the segmental gear of larger radius of rotation being in meshing engagement with the segmental gear formed integral with said operation lever and the segmental gear of smaller radius of rotation being in meshing engagement with the segmental gear formed integral with said member.
Claim 5
Dependent Claim
39 words
A device for controlling the elastic energy of a coiled spring as in claim 1, wherein said operation lever is connected at its free end to a slIding member for supporting a pin box of a portable calculating machine.
References Cited (Backward Citations)
US1816164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |