US3602861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hybrid element variable resistor
Assignee: Bourns Inc
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Filing: 1969-03-05
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Granted: 1971-08-31
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Expires: 1989-03-05
Abstract
Abstract A resistance element comprising an insulative base bearing first and second spaced-apart conductive terminals between which terminals extends a cermet component adherent to the base and a superposed conductive plastic component adherent to the cermet component and intimately in electrical contact therewith, both components having electrical connection at their first and second ends to respective ones of the terminals.
Inventors
- 👤 Donald G Tweed
- 👤 Richard L Bomar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:22
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A resistance element, said element comprising: an insulative base; first and second spaced-apart conductors on said base providing first and second terminals; a cermet resistive component on said base, extending between said first and second terminals and electrically contacting at least a portion of each of said terminals; and a conductive plastic resistive component overlying and in intimate physical and electrical contact with said cermet resistive component between said first and second terminals and in electrical communication with said terminals; the terminal-to-terminal resistance of said cermet resistive component being greater than that of the said conductive plastic resistive component whereby said element possesses desirable characteristics of said cermet resistive component and desirable characteristics of said conductive plastic resistive component and is characterized by marked reduction of undesirable chAracteristics of said resistive components.
Claim 2
Dependent Claim
132 words
A resistance element, said element comprising: an insulative base; first and second spaced-apart conductors on said base providing first and second terminals; a cermet resistive component on said base, extending between said first and second terminals and electrically contacting at least a portion of each of said terminals; and a conductive plastic resistive component overlying and in intimate physical and electrical contact with said cermet resistive component between said first and second terminals and in electrical communication with said terminals; the terminal-to-terminal resistance of said cermet resistive component being greater than that of the said conductive plastic resistive component whereby said element possesses desirable characteristics of said cermet resistive component and desirable characteristics of said conductive plastic resistive component and is characterized by marked reduction of undesirable chAracteristics of said resistive components.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |