Patent US3076139A successfully refreshed from Google Patents.
US3076139A
Expired / Lapsed
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Leak detector
Assignee: General Electric Co
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Filing: 1961-01-03
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Granted: 1963-01-29
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Expires: 1981-01-03
Abstract
No abstract record available.
Inventors
- 👤 John A Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:29
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62; G01N27/68; G01N27/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN A LEAK DETECTOR SYSTEM OF THE TYPE WHEREIN A GAS RESPONSIVE DETECTOR PROVIDES A SIGNAL CURRENT IN RESPONSE TO A VARIABLE TRACER GAS, A VOLTAGE DIVIDER IN CIRCUIT WITH SAID GAS RESPONSIVE DETECTOR FOR DEVELOPING VOLTAGES IN RESPONSE TO SAID SIGNAL CURRENT, AN RC COUPLING CIRCUIT COMPRISING A MULTI-POSITION SWITCH HAVING PAIRS OF CONTACTS, ONE CONTACT OF EACH PAIR BEING CONNECTED THROUGH A CAPACITOR TO PRESELECTED POINTS ON SAID VOLTAGE DIVIDER, THE OTHER CONTACT OF EACH PAIR BEING CONNECTED THROUGH A RESISTOR TO A DIFFERENT POINT ON SAID VOLTAGE DIVIDER THEREBY FORMING RC SHUNTS ABOUT PRESELECTED PORTIONS OF SAID VOLTAGE DIVIDER THROUGH SAID SWITCH CONTACT PAIRS, MEANS TO SELECTIVELY CONNECT AT LEAST ONE CONTACT CONNECTED TO A CAPACITOR TO AN INDICATOR CIRCUIT, SAID SWITCH INCLUDING
Claim 2
Dependent Claim
126 words
IN A LEAK DETECTOR SYSTEM OF THE TYPE WHEREIN A GAS RESPONSIVE DETECTOR PROVIDES A SIGNAL CURRENT IN RESPONSE TO A VARIABLE TRACER GAS, A VOLTAGE DIVIDER IN CIRCUIT WITH SAID GAS RESPONSIVE DETECTOR FOR DEVELOPING VOLTAGES IN RESPONSE TO SAID SIGNAL CURRENT, AN RC COUPLING CIRCUIT COMPRISING A MULTI-POSITION SWITCH HAVING PAIRS OF CONTACTS, ONE CONTACT OF EACH PAIR BEING CONNECTED THROUGH A CAPACITOR TO PRESELECTED POINTS ON SAID VOLTAGE DIVIDER, THE OTHER CONTACT OF EACH PAIR BEING CONNECTED THROUGH A RESISTOR TO A DIFFERENT POINT ON SAID VOLTAGE DIVIDER THEREBY FORMING RC SHUNTS ABOUT PRESELECTED PORTIONS OF SAID VOLTAGE DIVIDER THROUGH SAID SWITCH CONTACT PAIRS, MEANS TO SELECTIVELY CONNECT AT LEAST ONE CONTACT CONNECTED TO A CAPACITOR TO AN INDICATOR CIRCUIT, SAID SWITCH INCLUDING
References Cited (Backward Citations)
US2970259A
Cited
US2934694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |