US3085198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination leak detector and vacuum gauge
Assignee: General Electric Co
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Filing: 1959-02-17
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Granted: 1963-04-09
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Expires: 1979-02-17
Abstract
No abstract record available.
Inventors
- 👤 Walton E Briggs
- 👤 Albert C Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:32
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/02; H01J41/06; G; G01; G01L; G01L21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
IN A COMBINATION PRESSURE GAUGE AND LEAK DETECTOR, A PRESSURE GAUGE COMPRISING, A DETECTOR GAUGE AN ELECTRICAL CHARACTERISTIC OF WHICH VARIES WITH THE ATMOSPHERE THEREIN, SAID GAUGE VARIATIONS BEING RESPONSIVE TO THE PRESSURE OF THE ATMOSPHERE AND PARTICULARLY RESPONSIVE TO THE PRESENCE OF A PREDETERMINED TRACER GAS, AN ELECTRICAL INDICATING INSTRUMENT, AND A SOURCE OF VOLTAGE IN CIRCUIT WITH SAID DETECTOR GAUGE AND SAID INSTRUMENT SUCH THAT SAID INSTRUMENT OPERATES AS A PRESSURE GAUGE AND INDICATES SAID GAUGE VARIATIONS WHICH RESULT FROM CHANGES IN THE PRESSURE OF SAID ATMOSPHERE, AN ARRANGEMENT FOR SELECTIVELY CONVERTING SAID PRESSURE GAUGE TO A LEAK DETECTOR TO INDICATE THE PRESENCE OF SAID TRACER GAS WITHIN THE DETECTOR GAUGE AND COMPRISING, AN ELECTRICAL REFERENCE SOURCE, AND SWITCHING MEANS TO CONNECT SAID REFERENCE AND SAID ELECTRICAL INDICATING INSTRUMENT IN CIRCUIT WITH AN ELECTRICAL SIGNAL WHICH VARIES WITH SAID ELECTRICAL CHARACTERISTIC SO THAT SAID INSTRUMENT INDICATES THE DIFFERENCE BETWEEN SAID VARYING SIGNAL AND SAID ELECTRICAL REFERENCE.
Claim 2
Dependent Claim
158 words
IN A COMBINATION PRESSURE GAUGE AND LEAK DETECTOR, A PRESSURE GAUGE COMPRISING, A DETECTOR GAUGE AN ELECTRICAL CHARACTERISTIC OF WHICH VARIES WITH THE ATMOSPHERE THEREIN, SAID GAUGE VARIATIONS BEING RESPONSIVE TO THE PRESSURE OF THE ATMOSPHERE AND PARTICULARLY RESPONSIVE TO THE PRESENCE OF A PREDETERMINED TRACER GAS, AN ELECTRICAL INDICATING INSTRUMENT, AND A SOURCE OF VOLTAGE IN CIRCUIT WITH SAID DETECTOR GAUGE AND SAID INSTRUMENT SUCH THAT SAID INSTRUMENT OPERATES AS A PRESSURE GAUGE AND INDICATES SAID GAUGE VARIATIONS WHICH RESULT FROM CHANGES IN THE PRESSURE OF SAID ATMOSPHERE, AN ARRANGEMENT FOR SELECTIVELY CONVERTING SAID PRESSURE GAUGE TO A LEAK DETECTOR TO INDICATE THE PRESENCE OF SAID TRACER GAS WITHIN THE DETECTOR GAUGE AND COMPRISING, AN ELECTRICAL REFERENCE SOURCE, AND SWITCHING MEANS TO CONNECT SAID REFERENCE AND SAID ELECTRICAL INDICATING INSTRUMENT IN CIRCUIT WITH AN ELECTRICAL SIGNAL WHICH VARIES WITH SAID ELECTRICAL CHARACTERISTIC SO THAT SAID INSTRUMENT INDICATES THE DIFFERENCE BETWEEN SAID VARYING SIGNAL AND SAID ELECTRICAL 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) | 1966-04-08 | 1966-10-08 | 1967-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-08 | 1970-10-08 | 1971-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-08 | 1974-10-08 | 1975-04-09 | $7700.00 | Window Closed / Lapsed |