US3275889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection network
Assignee: Westinghouse Electric Corp
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Filing: 1963-07-15
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Granted: 1966-09-27
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Expires: 1983-07-15
Abstract
No abstract record available.
Inventors
- 👤 Robert L Sharp
- 👤 William E Glassburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:02
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/04; H02H7/045
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
158 words
IN A RELAYING DEVICE, FIRST AND SECOND INPUT CIRCUITS, FIRST AND SECOND RELAY DEVICES, EACH SAID DEVICE INCLUDING OPERATING AND A RESTRAINING WINDING MEANS AND A SWITCH ACTUATED AS A FUNCTION OF THE DIFFERENCE IN THE ENERGIZATION OF ITS SAID WINDING MEANS, MEANS CONNECTING SAID RESTRAINING WINDING MEANS OF SAID FIRST DEVICE TO AT LEAST ONE OF SAID INPUT CIRCUITS FOR ENERGIZATION IN ACCORDANCE WITH THE MAGNITUDE OF AN ELECTRICAL QUANTITY IN SAID ONE INPUT CIRCUIT, MEANS CONNECTING SAID OPERATING WINDING MEANS OF SAID FIRST DEVICE TO BOTH OF SAID INPUT CIRCUITS FOR ENERGIZATION IN ACCORDANCE WITH THE DIFFERENCE IN SAID MAGNITUDES OF SAID ELECTRICAL QUANTITY IN SAID INPUT CIRCUITS MEANS INCLUDING FILTER MEANS CONNECTING SAID RESTRAINING WINDING MEANS AND SAID OPERATING WINDING MEANS OF SAID SECOND DEVICE TO SAID INPUT CIRCUITS FOR ENERGIZATION IN ACCORDANCE WITH THE DIFFERENCE IN MAGNITUDES OF AN ALTERNATING ELECTRICAL QUANTITY APPEARING AT SAID INPUT CIRCUITS, SAID FILTER MEANS BEING EFFECTIVE TO AT-
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |