Patent US1814502A successfully refreshed from Google Patents.
US3079533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective relay
Assignee: General Electric Co
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Filing: 1961-07-17
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Granted: 1963-02-26
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Expires: 1981-07-17
Abstract
No abstract record available.
Inventors
- 👤 William C Kotheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:54
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/08; H02H3/093
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
MEANS FOR INITIATING A PREDETERMINED CONTROL FUNCTION IN DELAYED RESPONSE TO THE OCCURRENCE OF AN ABNORMAL CONDITION IN AN ELECTRIC CURRENT CIRCUIT, THE AMOUNT OF DELAY BEING INVERSELY RELATED TO THE SEVERITY OF THE ABNORMAL CONDITION, COMPRISING: CONDITION RESPONSIVE MEANS ADAPTED TO BE COUPLED TO THE CIRCUIT FOR DERIVING THEREFROM A D.-C. SIGNAL HAVING A MAGNITUDE WHICH IS DEPENDENT UPON THE VALUE OF A CHARACTERISTIC ELECTRIC QUANTITY OF THE CIRCUIT; A PULSATING SIGNAL SOURCE FOR SUPPLYING A SUCCESSION OF TRIANGULAR-WAVEFORM SIGNAL PULSES; ADDING MEANS CONNECTED TO SAID CONDITION RESPONSIVE MEANS AND TO SAID PULSATING SIGNAL SOURCE FOR PROVIDING A RESULTANT SIGNAL CORRESPONDING TO THE SUM OF THE D.-C. AND PULSATING SIGNALS; MEANS FOR INTRODUCING, IN SUBSTRACTIVE RELATIONSHIP WITH THE RESULTANT SIGNAL, A UNIPOLARITY REFERENCE
Claim 2
Dependent Claim
124 words
MEANS FOR INITIATING A PREDETERMINED CONTROL FUNCTION IN DELAYED RESPONSE TO THE OCCURRENCE OF AN ABNORMAL CONDITION IN AN ELECTRIC CURRENT CIRCUIT, THE AMOUNT OF DELAY BEING INVERSELY RELATED TO THE SEVERITY OF THE ABNORMAL CONDITION, COMPRISING: CONDITION RESPONSIVE MEANS ADAPTED TO BE COUPLED TO THE CIRCUIT FOR DERIVING THEREFROM A D.-C. SIGNAL HAVING A MAGNITUDE WHICH IS DEPENDENT UPON THE VALUE OF A CHARACTERISTIC ELECTRIC QUANTITY OF THE CIRCUIT; A PULSATING SIGNAL SOURCE FOR SUPPLYING A SUCCESSION OF TRIANGULAR-WAVEFORM SIGNAL PULSES; ADDING MEANS CONNECTED TO SAID CONDITION RESPONSIVE MEANS AND TO SAID PULSATING SIGNAL SOURCE FOR PROVIDING A RESULTANT SIGNAL CORRESPONDING TO THE SUM OF THE D.-C. AND PULSATING SIGNALS; MEANS FOR INTRODUCING, IN SUBSTRACTIVE RELATIONSHIP WITH THE RESULTANT SIGNAL, A UNIPOLARITY REFERENCE
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) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |