US3274359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal relay
Assignee: McGraw Edison Co
•
Filing: 1963-12-30
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Granted: 1966-09-20
•
Expires: 1983-12-30
Abstract
No abstract record available.
Inventors
- 👤 Richard E Riebs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:09
CPC Classifications
H; H01; H01H; H01H61/00; H01H61/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A THERMAL RELAY INCLUDING A FLAT ELONGATED GENERALLY E-SHAPED BIMETALLIC ELEMENT HAVING THREE ADJACENT DISPOSED SUBSTANTIALLY PARALLEL LEGS, ONE END OF EACH OF SAID LEGS BEING JOINED BY A COMMON END PORTION, A FIRST COATING COVERING A SUBSTANTIAL ELONGATE PORTION OF ONE SURFACE OF THE CENTRAL ONE OF SAID LEGS AND EXTENDING FROM SAID ONE END TO A TERMINAL POSITION SHORT OF THE OTHER END THEREOF, SAID FIRST COATING COMPRISING AN ELECTRICAL INSULATING MATERIAL, A SECOND ELONGATE COATING DISPOSED ON SAID CENTRAL LEG AND CONSISTING OF ELECTRICAL RESISTANCE MATERIAL, SAID SECOND COATING BEING DISPOSED ON SAID FIRST COATING AND EXTENDING FROM THE ONE END OF SAID CENTRAL LEG PAST SAID TERMINAL POSITION AND ONTO THE OTHER END OF SAID ELEMENT FOR ELECTRICALLY ENGAGING SAID ELEMENT, SAID FIRST COATING ELECTRICAL INSULATING THE REMAINDER OF SAID RESISTANCE COATING FROM SAID ELEMENT, FIRST ELECTRICAL TERMINAL MEANS ELECTRICALLY CONNECTED TO SAID RESISTANCE COATING ADJACENT SAID ONE END, AND SECOND ELECTRICAL TERMINAL MEANS CONNECTED TO THE OTHER END OF ONE OF THE OUTER ONES OF SAID LEGS.
Claim 2
Dependent Claim
172 words
A THERMAL RELAY INCLUDING A FLAT ELONGATED GENERALLY E-SHAPED BIMETALLIC ELEMENT HAVING THREE ADJACENT DISPOSED SUBSTANTIALLY PARALLEL LEGS, ONE END OF EACH OF SAID LEGS BEING JOINED BY A COMMON END PORTION, A FIRST COATING COVERING A SUBSTANTIAL ELONGATE PORTION OF ONE SURFACE OF THE CENTRAL ONE OF SAID LEGS AND EXTENDING FROM SAID ONE END TO A TERMINAL POSITION SHORT OF THE OTHER END THEREOF, SAID FIRST COATING COMPRISING AN ELECTRICAL INSULATING MATERIAL, A SECOND ELONGATE COATING DISPOSED ON SAID CENTRAL LEG AND CONSISTING OF ELECTRICAL RESISTANCE MATERIAL, SAID SECOND COATING BEING DISPOSED ON SAID FIRST COATING AND EXTENDING FROM THE ONE END OF SAID CENTRAL LEG PAST SAID TERMINAL POSITION AND ONTO THE OTHER END OF SAID ELEMENT FOR ELECTRICALLY ENGAGING SAID ELEMENT, SAID FIRST COATING ELECTRICAL INSULATING THE REMAINDER OF SAID RESISTANCE COATING FROM SAID ELEMENT, FIRST ELECTRICAL TERMINAL MEANS ELECTRICALLY CONNECTED TO SAID RESISTANCE COATING ADJACENT SAID ONE END, AND SECOND ELECTRICAL TERMINAL MEANS CONNECTED TO THE OTHER END OF ONE OF THE OUTER ONES OF SAID LEGS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |