Patent US4123742A successfully refreshed from Google Patents.
US4123742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable resistor
Assignee: Alps Alpine Co Ltd
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Filing: 1977-06-27
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Granted: 1978-10-31
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Expires: 1997-06-27
Abstract
Abstract A variable resistor has an insulating substrate plate, a resistance body formed on the substrate plate and a slider adapted to slide along the resistance body. The resistance body is formed in a winding pattern to provide a larger range of variation of resistance for a given stroke of the slider. The slider has a plurality of contacts adapted for sliding along the resistance body so that at least one of the contacts is kept in contact with the winding resistance body so as to provide a linear change of the output of the resistor.
Inventors
- 👤 Moritoshi Nakamura
- 👤 Jun Nakanowatari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:45
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/30; H01C10/301; H01C10/303; H01C10/38
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
100 words
A variable resistor comprising: a substrate plate formed from an electrically insulating material; a resistance body formed in a back and forth winding pattern upon said substrate plate; and a slider adapted to be moved along said resistance body, said slider having a width at least as wide as the widest portion of said resistance body and being provided with a plurality of contacts arranged along its width whereby the contacts of said slider will maintain a continuous electrical contact traveling along the winding length of said resistance body as said slider is moved longitudinally along said winding resistance body.
Claim 2
Dependent Claim
100 words
A variable resistor comprising: a substrate plate formed from an electrically insulating material; a resistance body formed in a back and forth winding pattern upon said substrate plate; and a slider adapted to be moved along said resistance body, said slider having a width at least as wide as the widest portion of said resistance body and being provided with a plurality of contacts arranged along its width whereby the contacts of said slider will maintain a continuous electrical contact traveling along the winding length of said resistance body as said slider is moved longitudinally along said winding resistance body.
Claim 3
Dependent Claim
23 words
A variable resistor according to claim 1, wherein the width of said resistance body varies in a longitudinal direction of said resistance body.
References Cited (Backward Citations)
US1755314A
Cited
US3703699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |