US2694128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conductive device with variable electric resistance
Assignee: CONTE SOC
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Filing: 1952-07-11
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Granted: 1954-11-09
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Expires: 1972-07-11
Abstract
No abstract record available.
Inventors
- 👤 Maurin Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:09
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/10; H01C10/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A DEVICE COMPRISING A RESISTANCE ADAPTED TO VARY ITS ELECTRICAL CONDUCTIVITY IN RESPONSE TO THE MECHANICAL STRESSES TO WHICH IT IS SUBJECTED AND TO THE VOLTAGE THEREON APPLIED, INCLUDING A THIN SEMI-CONDUCTIVE STRIP MADE OF AN INSULATING RESILIENT MATERIAL SELECTED IN THE GROUP CONSISTING OF THERMOPLASTIC, THERMOSETTING AND CERAMIC MATERIALS HAVING A SMALL MECHANICAL HYSTERESIS AND A MODULUS OF ELASTICITY GREATER THAN 2000 KG./CM.2, IN THE PROPORTION OF 30% TO 85% IN VOLUME, AND A POWDERED CONDUCTIVE MATERIAL SCATTERED INTO SAID INSULATING MATERIAL IN A PROPORTION OF 15* TO 70* IN VOLUME AND SELECTED FROM THE GROUP CONSISTING OF POWDERED CARBON, GRAPHITE AND METALLIC POWDERS, AND TWO METALLIC PLATES FORMING ELECTRODES ARRANGED IN CONTACT WITH THE OPPOSITE FACES OF THE SEMI-CONDUCTIVE STRIP RESPECTIVELY, AT LEAST ONE OF WHICH IS SIMPLY APPLIED UPON SAID SEMI-CONDUCTIVE STRIP UNDER MODERATE TIGHTENING WITHOUT BEING INTIMATELY BOUND THEREWITH.
Claim 2
Independent Claim
143 words
A DEVICE COMPRISING A RESISTANCE ADAPTED TO VARY ITS ELECTRICAL CONDUCTIVITY IN RESPONSE TO THE MECHANICAL STRESSES TO WHICH IT IS SUBJECTED AND TO THE VOLTAGE THEREON APPLIED, INCLUDING A THIN SEMI-CONDUCTIVE STRIP MADE OF AN INSULATING RESILIENT MATERIAL SELECTED IN THE GROUP CONSISTING OF THERMOPLASTIC, THERMOSETTING AND CERAMIC MATERIALS HAVING A SMALL MECHANICAL HYSTERESIS AND A MODULUS OF ELASTICITY GREATER THAN 2000 KG./CM.2, IN THE PROPORTION OF 30% TO 85% IN VOLUME, AND A POWDERED CONDUCTIVE MATERIAL SCATTERED INTO SAID INSULATING MATERIAL IN A PROPORTION OF 15* TO 70* IN VOLUME AND SELECTED FROM THE GROUP CONSISTING OF POWDERED CARBON, GRAPHITE AND METALLIC POWDERS, AND TWO METALLIC PLATES FORMING ELECTRODES ARRANGED IN CONTACT WITH THE OPPOSITE FACES OF THE SEMI-CONDUCTIVE STRIP RESPECTIVELY, AT LEAST ONE OF WHICH IS SIMPLY APPLIED UPON SAID SEMI-CONDUCTIVE STRIP UNDER MODERATE TIGHTENING WITHOUT BEING INTIMATELY BOUND THEREWITH.
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) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |