US3417293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reverse current indicating circuit
Assignee: General Electric Co
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Filing: 1966-10-28
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Granted: 1968-12-17
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Expires: 1986-10-28
Abstract
No abstract record available.
Inventors
- 👤 Lawrence R Peaslee
- 👤 David L Lafuze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:11
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
IN A SYSTEM FOR MONITORING THE AMPLITUDE OF DIRECT CURRENT FLOWING IN A LINE OF THE TYPE IN WHICH THE SENSING ELEMENT COUPLED TO SAID LINE IS A SATURABLE REACTOR HAVING ONE OR MORE CORES WHEREIN EACH CORE HAS A WINDING, AND INCLUDING A SOURCE OF EXCITATION APPLIED TO SAID SATURABLE REACTOR TO DERIVE AN OUTPUT THEREFROM THAT IS INDICATIVE OF THE CHARACTERISTICS OF SAID DIRECT CURRENT, A CIRCUIT FOR INDICATING THE DIRECTION OF CURRENT FLOW COMPRISING A GATE CIRCUIT, MEANS COUPLED TO SAID SOURCE OF EXCITATION FOR DERIVING SAMPLING PULSES AS A FIRST INPUT TO SAID GATE CIRCUIT, MEANS COUPLING THE VOLTAGE ACROSS ONE WINDING OF SAID SATURABLE REACTOR TO SAID GATE CIRCUIT AS A SECOND INPUT, SAID GATE CIRCUIT INCLUDING MEANS FOR ESTABLISHING A THRESHOLD VOLTAGE FOR SAID SECOND INPUT SO THAT AN OUTPUT INDICATION OF THE DIRECTION OF CURRENT FLOW IS OBTAINED FROM SAID GATE CIRCUIT WHEN A SAMPLING PULSE IS AT SAID FIRST INPUT AND THE VOLTAGE AT SAID SECOND INPUT EXCEEDS SAID THRESHOLD VOLTAGE.
Claim 2
Dependent Claim
169 words
IN A SYSTEM FOR MONITORING THE AMPLITUDE OF DIRECT CURRENT FLOWING IN A LINE OF THE TYPE IN WHICH THE SENSING ELEMENT COUPLED TO SAID LINE IS A SATURABLE REACTOR HAVING ONE OR MORE CORES WHEREIN EACH CORE HAS A WINDING, AND INCLUDING A SOURCE OF EXCITATION APPLIED TO SAID SATURABLE REACTOR TO DERIVE AN OUTPUT THEREFROM THAT IS INDICATIVE OF THE CHARACTERISTICS OF SAID DIRECT CURRENT, A CIRCUIT FOR INDICATING THE DIRECTION OF CURRENT FLOW COMPRISING A GATE CIRCUIT, MEANS COUPLED TO SAID SOURCE OF EXCITATION FOR DERIVING SAMPLING PULSES AS A FIRST INPUT TO SAID GATE CIRCUIT, MEANS COUPLING THE VOLTAGE ACROSS ONE WINDING OF SAID SATURABLE REACTOR TO SAID GATE CIRCUIT AS A SECOND INPUT, SAID GATE CIRCUIT INCLUDING MEANS FOR ESTABLISHING A THRESHOLD VOLTAGE FOR SAID SECOND INPUT SO THAT AN OUTPUT INDICATION OF THE DIRECTION OF CURRENT FLOW IS OBTAINED FROM SAID GATE CIRCUIT WHEN A SAMPLING PULSE IS AT SAID FIRST INPUT AND THE VOLTAGE AT SAID SECOND INPUT EXCEEDS SAID THRESHOLD VOLTAGE.
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) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |