Patent US3156864A successfully refreshed from Google Patents.
US3156864A
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Apparatus for testing the insulation of a plurality of mutually insulated conductors with means for applying separate alternating potentials to each of the conductors
Assignee: AT&T Inc
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Filing: 1960-12-20
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Granted: 1964-11-10
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Expires: 1980-12-20
Abstract
No abstract record available.
Inventors
- 👤 Everett J Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:11
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/50; G01R31/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
APPARATUS FOR TESTING THE INSULATION OF AT LEAST THREE MUTUALLY INSULATED CONDUCTORS WHICH COMPRISES MEANS FOR SUPPLYING AT LEAST THREE SEPARATE ALTERNATING POTENTIALS OF PREDETERMINED AMPLITUDES, MEANS FOR CONNECTING EACH OF THE CONDUCTORS TO BE TESTED TO A DIFFERENT ONE OF SAID POTENTIALS, SAID SUPPLY MEANS BEING DESIGNED FOR CAUSING OPPOSED PEAKING OF THE POTENTIAL APPLIED TO ONE CONDUCTOR RELATIVE TO EACH OF THE RESPECTIVE POTENTIALS APPLIED TO THE OTHER CONDUCTORS, AND MEANS FOR MONITORING THE ELECTRICAL CONDITION OF THE CONDUCTORS TO DETECT THE PRESENCE OF A FAULT IN THE INSULATION BETWEEN ANY OF THE CONDUCTORS.
Claim 2
Dependent Claim
96 words
APPARATUS FOR TESTING THE INSULATION OF AT LEAST THREE MUTUALLY INSULATED CONDUCTORS WHICH COMPRISES MEANS FOR SUPPLYING AT LEAST THREE SEPARATE ALTERNATING POTENTIALS OF PREDETERMINED AMPLITUDES, MEANS FOR CONNECTING EACH OF THE CONDUCTORS TO BE TESTED TO A DIFFERENT ONE OF SAID POTENTIALS, SAID SUPPLY MEANS BEING DESIGNED FOR CAUSING OPPOSED PEAKING OF THE POTENTIAL APPLIED TO ONE CONDUCTOR RELATIVE TO EACH OF THE RESPECTIVE POTENTIALS APPLIED TO THE OTHER CONDUCTORS, AND MEANS FOR MONITORING THE ELECTRICAL CONDITION OF THE CONDUCTORS TO DETECT THE PRESENCE OF A FAULT IN THE INSULATION BETWEEN ANY OF THE CONDUCTORS.
References Cited (Backward Citations)
US2522362A
Cited
US2746015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |