US3239637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical devices
Assignee: E AND P ENGINEERING RES AND DE
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Filing: 1962-12-03
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Granted: 1966-03-08
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Expires: 1982-12-03
Abstract
No abstract record available.
Inventors
- 👤 Edwin F Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:59
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/30; H01H; H01H13/00; H01H13/02; H01H13/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
AN ELECTROMECHANICAL DEVICE COMPRISING: (A) A FIRST CONDUCTIVE CONTACT ELEMENT HAVING A PITTED CONTACT SURFACE; (B) A SECOND CONDUCTIVE CONTACT ELEMENT HAVING A CONTACT SURFACE PROVIDING A FLAKING ACTION; (C) MEANS PROVIDING SLIDING MOTION BETWEEN SAID CONTACT ELEMENTS; (D) A LUBRICANT DISPOSED BETWEEN SAID CONTACT ELEMENTS AND FILLING THE PITS IN SAID FIRST CONTACT ELEMENT TO PROMOTE FORMATION OF A LUBRICANT FILM ON THE FIRST CONTACT ELEMENT, AND SAID LUBRICANT BEING ELECTRICALLY INSULATING AND HAVING A HIGH DIELECTRIC CONSTANT AND HAVING A LOW SURFACE TENSION; AND (E) MEANS CONTINUOUSLY ACTING UPON ONE OF SAID CON TACT ELEMENTS FOR URGING SAID ELEMENTS INTO CONTACT WITH EACH OTHER WITH A FORCE IN EXCESS OF THAT REQUIRED TO BREAK THROUGH SAID LUBRICANT FILM, WHEREBY CONDUCTIVE PARTICLES WORN OFF SAID CONTACT ELEMENTS DURING SLIDING MOTION THEREOF DUE TO THE CONTACT PRESSURE ARE IMBEDDED IN SAID LUBRICANT AND INSULATED FROM EACH OTHER TO PREVENT UNDESIRED SHORT CIRCUITS BETWEEN SAID CONTACT ELEMENTS.
Claim 2
Dependent Claim
156 words
AN ELECTROMECHANICAL DEVICE COMPRISING: (A) A FIRST CONDUCTIVE CONTACT ELEMENT HAVING A PITTED CONTACT SURFACE; (B) A SECOND CONDUCTIVE CONTACT ELEMENT HAVING A CONTACT SURFACE PROVIDING A FLAKING ACTION; (C) MEANS PROVIDING SLIDING MOTION BETWEEN SAID CONTACT ELEMENTS; (D) A LUBRICANT DISPOSED BETWEEN SAID CONTACT ELEMENTS AND FILLING THE PITS IN SAID FIRST CONTACT ELEMENT TO PROMOTE FORMATION OF A LUBRICANT FILM ON THE FIRST CONTACT ELEMENT, AND SAID LUBRICANT BEING ELECTRICALLY INSULATING AND HAVING A HIGH DIELECTRIC CONSTANT AND HAVING A LOW SURFACE TENSION; AND (E) MEANS CONTINUOUSLY ACTING UPON ONE OF SAID CON TACT ELEMENTS FOR URGING SAID ELEMENTS INTO CONTACT WITH EACH OTHER WITH A FORCE IN EXCESS OF THAT REQUIRED TO BREAK THROUGH SAID LUBRICANT FILM, WHEREBY CONDUCTIVE PARTICLES WORN OFF SAID CONTACT ELEMENTS DURING SLIDING MOTION THEREOF DUE TO THE CONTACT PRESSURE ARE IMBEDDED IN SAID LUBRICANT AND INSULATED FROM EACH OTHER TO PREVENT UNDESIRED SHORT CIRCUITS BETWEEN SAID CONTACT ELEMENTS.
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |