Patent US3278804A successfully refreshed from Google Patents.
US3278804A
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Directional overcurrent relays
Assignee: Westinghouse Electric Corp
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Filing: 1962-06-27
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Granted: 1966-10-11
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Expires: 1982-06-27
Abstract
No abstract record available.
Inventors
- 👤 Herbert W Lensner
- 👤 Paul J Schwanenflugel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:23
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/08; H02H3/093
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
IN A PROTECTIVE ARRANGEMENT FOR AN ELECTIC SYSTEM, A DIRECTIONAL RELAY INCLUDING A FIRST SWITCH OPERABLE INTO CLOSED AND OPEN CONDITIONS DEPENDENT ON THE DIRECTION OF THE ENERGIZATION APPLIED TO THE DIRECTIONAL RELAY, AN OVERCURRENT RELAY INCLUDING A SECOND SWITCH OPERABLE INTO CLOSED AND OPEN CONDITIONS DEPENDENT ON THE MAGNITUDE OF THE ENERGIZATION OF THE OVERCURRENT RELAY, A SOURCE OF ENERGY, AN ENERGY-CONTROLLED SWITCH DEPENDENT ON THE POLARITY OF ITS ENERGIZATION FOR CONTROLLING THE OPERABILITY OF THE OVERCURRENT RELAY AND CONTROL MEANS EFFECTIVE WITH THE FIRST SWITCH IN A FIRST CONDITION FOR ENERGIZING THE CONTROLLED SWITCH FROM SAID SOURCE WITH A FIRST POLARITY FOR RENDERING THE OVERCURRENT RELAY INOPERATIVE, SAID CONTROL
Claim 2
Dependent Claim
111 words
IN A PROTECTIVE ARRANGEMENT FOR AN ELECTIC SYSTEM, A DIRECTIONAL RELAY INCLUDING A FIRST SWITCH OPERABLE INTO CLOSED AND OPEN CONDITIONS DEPENDENT ON THE DIRECTION OF THE ENERGIZATION APPLIED TO THE DIRECTIONAL RELAY, AN OVERCURRENT RELAY INCLUDING A SECOND SWITCH OPERABLE INTO CLOSED AND OPEN CONDITIONS DEPENDENT ON THE MAGNITUDE OF THE ENERGIZATION OF THE OVERCURRENT RELAY, A SOURCE OF ENERGY, AN ENERGY-CONTROLLED SWITCH DEPENDENT ON THE POLARITY OF ITS ENERGIZATION FOR CONTROLLING THE OPERABILITY OF THE OVERCURRENT RELAY AND CONTROL MEANS EFFECTIVE WITH THE FIRST SWITCH IN A FIRST CONDITION FOR ENERGIZING THE CONTROLLED SWITCH FROM SAID SOURCE WITH A FIRST POLARITY FOR RENDERING THE OVERCURRENT RELAY INOPERATIVE, SAID CONTROL
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |