US3913059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable resistor having front and back stages operated by concentric shafts coupled in rotary operation by friction through a spring
Assignee: Panasonic Holdings Corp
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Filing: 1974-08-14
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Granted: 1975-10-14
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Expires: 1994-08-14
Abstract
Abstract In a variable resistor wherein a front-stage variable resistor operated by an outer shaft and a back-stage variable resistor operated by an inner shaft fitted concentrically in said outer shaft are coupled in the axial direction of both shafts and these shafts are coupled in rotary operation by friction through a spring which compresses against the circumferential surface of the inner shaft, said spring is made by bending an elastic wire material into a rectangular shape, the shorter sides of said spring being fixed to the end of the said outer shaft together with a brush mounting plate of the front-stage variable resistor by clinching end protrusions of said outer shaft, the said spring being penetrated by the said inner shaft, and the longer sides of said spring compressing against the circumferential surface of said inner shaft.
Inventors
- 👤 Hiroshi Matsui
- 👤 Tadashi Mihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:45
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/16; H01C10/20; H01C10/30; H01C10/32; H01C10/36; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20396; Y10T74/20474; Y10T74/20576; Y10T74/20636; Y10T74/2066
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
159 words
A variable resistor wherein a front-stage variable resistor operated by an outer shaft and a back-stage variable resistor operated by an inner shaft fitted concentrically in said outer shaft are arranged in the axial direction of both shafts and these shafts are coupled in rotary operation by friction through a spring which compresses against the circumferential surface of the inner shaft characterized in that said spring is made by bending an elastic wire material into a rectangular shape, the shorter elements of the said spring being fixed to the end of said outer shaft together with a brush-mounting plate of the front-stage variable resistor by clinching end projections of said outer shaft, said spring being passed through by said inner shaft, and the longer elements of said spring compressing against the circumferential surface of said inner shaft so that a frictional force is produced between the longer elements of said spring and the circumferential surface of said inner shaft.
Claim 2
Dependent Claim
159 words
A variable resistor wherein a front-stage variable resistor operated by an outer shaft and a back-stage variable resistor operated by an inner shaft fitted concentrically in said outer shaft are arranged in the axial direction of both shafts and these shafts are coupled in rotary operation by friction through a spring which compresses against the circumferential surface of the inner shaft characterized in that said spring is made by bending an elastic wire material into a rectangular shape, the shorter elements of the said spring being fixed to the end of said outer shaft together with a brush-mounting plate of the front-stage variable resistor by clinching end projections of said outer shaft, said spring being passed through by said inner shaft, and the longer elements of said spring compressing against the circumferential surface of said inner shaft so that a frictional force is produced between the longer elements of said spring and the circumferential surface of said inner shaft.
Claim 3
Dependent Claim
42 words
A variable resistor according to claim 1 characterized in that the shorter elements of the said rectangular shaped spring are smaller than the diameter of said inner shaft and the longer elements are larger than the diameter of the said inner shaft.
Claim 4
Dependent Claim
48 words
A variable resistor according to claim 1 characteRized in that said spring is contained in a depression provided on the surface of said brush-mounting plate, and said brush-mounting plate is fixed, through a washer covering said spring, to the end of said outer shaft by clinching said projections.
Claim 5
Dependent Claim
25 words
A variable resistor according to claim 3 wherein the depth of said depression is larger than the diameter of the wire material of said spring.
Claim 6
Dependent Claim
40 words
A variable resistor according to claim 1 characterized in that said spring is contained in a depression provided on the surface of said brush-mounting plate which is fixed to the end of the said outer shaft by clinching said projections.
Claim 7
Dependent Claim
25 words
A variable resistor according to claim 5 wherein the depth of said depression is larger than the diameter of the wire material of said spring.
Claim 8
Dependent Claim
46 words
A variable resistor according to claim 1 characterized in that said spring is positioned by projections provided on the surface of said brush-mounting plate, and said brush-mounting plate is fixed to the end of said outer shaft together with the shorter sides elements of said spring.
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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |