Patent US4132970A successfully refreshed from Google Patents.
US4132970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Potentiometer
Assignee: Denki Onkyo Co Ltd
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Filing: 1977-08-08
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Granted: 1979-01-02
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Expires: 1997-08-08
Abstract
Abstract A potentiometer includes a pair of magnetic resistance effect elements which cooperate with a permanent magnet carried by a rotary shaft. The shaft is supported for angular movement by a cylindrical holder formed of synthetic resin material and disposed in partial surrounding relationship and in contact with the shaft. The holder includes a cylindrical reinforcing member of metallic material embedded therein and having an axis which is aligned with the axis of the rotary shaft. The member affords reinforcement to and prevents a distortion during molding of the holder.
Inventors
- 👤 Noboru Masuda
- 👤 Shoichi Sugimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:10
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/30; H01C10/32; H10; H10N; H10N50/00; H10N50/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
A potentiometer comprising a rotary shaft having one end connectable to a system rotationally movable a cylindrical holder made of a synthetic resin material and partially surrounding the rotary shaft circumferentially and supporting it for angular movement, a pair of magnetic resistance effect semi-conductor elements disposed in opposing relationship with the other end of the shaft with a clearance therebetween a supporting member connected with the holder supporting said pair of semi-conductor elements, a permanent magnet carried by said other end of the shaft and producing a magnetic field which alternately acts on the pair of elements as the shaft moves angularly, and a cylindrical reinforcing member of a metallic material and having an axis aligned with the axis of the shaft, the reinforcing member being embedded within the holder, and the inner surface of the holder serving as a bearing surface for the shaft.
Claim 2
Dependent Claim
145 words
A potentiometer comprising a rotary shaft having one end connectable to a system rotationally movable a cylindrical holder made of a synthetic resin material and partially surrounding the rotary shaft circumferentially and supporting it for angular movement, a pair of magnetic resistance effect semi-conductor elements disposed in opposing relationship with the other end of the shaft with a clearance therebetween a supporting member connected with the holder supporting said pair of semi-conductor elements, a permanent magnet carried by said other end of the shaft and producing a magnetic field which alternately acts on the pair of elements as the shaft moves angularly, and a cylindrical reinforcing member of a metallic material and having an axis aligned with the axis of the shaft, the reinforcing member being embedded within the holder, and the inner surface of the holder serving as a bearing surface for the shaft.
Claim 3
Dependent Claim
15 words
A potentiometer according to claim 1 in which the reinforcing member comprises a magnetic material.
Claim 4
Dependent Claim
16 words
A potentiometer according to claim 1 in which the reinforcing member comprises an electrically conductive material.
Claim 5
Dependent Claim
19 words
A potentiometer according to claim 1 in which the reinforcing member has a flange extending out of the holder.
Claim 6
Dependent Claim
57 words
A potentiometer according to claim 1, further including a cap of a metallic material enclosing said other end of the shaft, the permanent magnet and the pair of elements being disposed in spaced relationship therefrom, the reinforcing member including a flange extending out of the holder, and the flange being connected with the end of the cap.
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) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |