Patent US3234459A successfully refreshed from Google Patents.
US3234459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for locating faults in electrical cable lines by comparing the impedance of the entire faulted line to the impedance of a section of the line
Assignee: Whitney Blake Co
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Filing: 1959-01-02
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Granted: 1966-02-08
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Expires: 1979-01-02
Abstract
No abstract record available.
Inventors
- 👤 John A Brazee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:38
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A METHOD OF LOCATING A BREAK IN A FAULTED FIRST CONDUCTOR IN A FIRST PAIR OF CONDUCTORS FROM ONE END THEREOF BY COMPARING THE CAPACITANCE BETWEEN ONE SECTION OF SAID FAULTED FIRST CONDUCTOR AND THE SECOND CONDUCTOR OF SAID FIRST PAIR WITH THE ENTIRE CAPACITANCE BETWEEN SAID CONDUCTORS, SAID METHOD COMPRISING THE STEPS OF MEASURING THE RATIO OF SAID CAPACITANCE OF SAID SECTION TO THE CAPACITANCE OF THE ENTIRE FAULTED CONDUCTOR PLUS THE CAPACITANCE BETWEEN THIRD AND FOURTH CONDUCTORS EXTENDING FROM ONE END OF SAID FIRST PAIR TO THE OTHER, AND MEASURING THE RATIO OF SAID CAPACITANCE TO THE OTHER, AND TO THAT OF SAID SECTION PLUS THAT BETWEEN SAID THIRD AND FOURTH CONDUCTORS.
Claim 2
Independent Claim
114 words
A METHOD OF LOCATING A BREAK IN A FAULTED FIRST CONDUCTOR IN A FIRST PAIR OF CONDUCTORS FROM ONE END THEREOF BY COMPARING THE CAPACITANCE BETWEEN ONE SECTION OF SAID FAULTED FIRST CONDUCTOR AND THE SECOND CONDUCTOR OF SAID FIRST PAIR WITH THE ENTIRE CAPACITANCE BETWEEN SAID CONDUCTORS, SAID METHOD COMPRISING THE STEPS OF MEASURING THE RATIO OF SAID CAPACITANCE OF SAID SECTION TO THE CAPACITANCE OF THE ENTIRE FAULTED CONDUCTOR PLUS THE CAPACITANCE BETWEEN THIRD AND FOURTH CONDUCTORS EXTENDING FROM ONE END OF SAID FIRST PAIR TO THE OTHER, AND MEASURING THE RATIO OF SAID CAPACITANCE TO THE OTHER, AND TO THAT OF SAID SECTION PLUS THAT BETWEEN SAID THIRD AND FOURTH CONDUCTORS.
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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |