US3594767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric line fault indicator
Assignee: Cooper Power Acquisition Corp
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Filing: 1968-08-28
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Granted: 1971-07-20
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Expires: 1988-08-28
Abstract
Abstract Disclosed herein is a high voltage underground cable fault indicator having a rotor mounted for movement within a sealed housing with a voltage sensitive element to move the rotor in one direction and a current sensitive element to move the rotor in the other direction. Light conductive members may be connected to the housing to provide a visual indication of the position of the rotor in the housing.
Inventors
- 👤 Edwin A Link
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:29
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/08
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
101 words
A fault indicator for an electrical conductor, said indicator comprising a semiconductive support adapted to be mounted on the conductor and including a pair of magnetic pole pieces, a housing adapted to be mounted on said support, a rotor sealed within said housing, first means carried by said rotor for rotating said rotor in one direction to a first position within said housing in response to normal voltage on the conductor, and second means on said rotor for rotating said rotor in the other direction to a second position within said housing in response to a fault current on the conductor.
Claim 2
Dependent Claim
101 words
A fault indicator for an electrical conductor, said indicator comprising a semiconductive support adapted to be mounted on the conductor and including a pair of magnetic pole pieces, a housing adapted to be mounted on said support, a rotor sealed within said housing, first means carried by said rotor for rotating said rotor in one direction to a first position within said housing in response to normal voltage on the conductor, and second means on said rotor for rotating said rotor in the other direction to a second position within said housing in response to a fault current on the conductor.
Claim 3
Dependent Claim
22 words
The fault indicator according to claim 1 wherein said rotor is dynamically balanced to remain in a fixed position on current interruption.
Claim 4
Dependent Claim
109 words
A fault indicator for an electrical conductor, said indicator comprising a housing adapted to be mounted on the conductor, a rotor sealed within said housing, first means for rotating said rotor in one direction to a first position within said housing in response to normal voltage on the conductor, second means for rotating said rotor in the other direction to a second position within said housing in response to a fault current on the conductor, means mounted on said housing for conducting light through said housing, and means mounted on said rotor for interrupting the light path through said light conducting means when moved to one of said positions.
Claim 5
Dependent Claim
109 words
A fault indicator for an electrical conductor, said indicator comprising a housing adapted to be mounted on the conductor, a rotor sealed within said housing, first means for rotating said rotor in one direction to a first position within said housing in response to normal voltage on the conductor, second means for rotating said rotor in the other direction to a second position within said housing in response to a fault current on the conductor, means mounted on said housing for conducting light through said housing, and means mounted on said rotor for interrupting the light path through said light conducting means when moved to one of said positions.
Claim 6
Dependent Claim
92 words
A fault indicator for an electrical conductor, said indicator comprising, a housing adapted to be mounted on the conductor, a rotor sealed within said housing, first means for rotating said rotor in one direction to a first position within said housing in response to normal voltage on the conductor, second means for rotating said rotor in the other direction to a second position within said housing in response to a fault current on the conductor, and light means embedded within said rotor and being responsive to a normal voltage on the cable.
Claim 7
Dependent Claim
92 words
A fault indicator for an electrical conductor, said indicator comprising, a housing adapted to be mounted on the conductor, a rotor sealed within said housing, first means for rotating said rotor in one direction to a first position within said housing in response to normal voltage on the conductor, second means for rotating said rotor in the other direction to a second position within said housing in response to a fault current on the conductor, and light means embedded within said rotor and being responsive to a normal voltage on the cable.
Claim 8
Dependent Claim
36 words
A fault indicator according to claim 4 including A light conducting filament mounted on said housing to provide a visual indication of the condition of said light means at a point remote from said light means.
Claim 9
Dependent Claim
72 words
A self-restoring fault current indicator for an electric cable, said indicator comprising a sealed housing, a rotor within said housing, a magnetic force responsive means for rotating said rotor in one direction to a first position in said housing, an electrostatic force responsive means for rotating said rotor in the other direction to a second position in said housing, a light in said rotor responsive to an electrostatic force on the cable.
Claim 10
Dependent Claim
72 words
A self-restoring fault current indicator for an electric cable, said indicator comprising a sealed housing, a rotor within said housing, a magnetic force responsive means for rotating said rotor in one direction to a first position in said housing, an electrostatic force responsive means for rotating said rotor in the other direction to a second position in said housing, a light in said rotor responsive to an electrostatic force on the cable.
Claim 11
Dependent Claim
100 words
A self-restoring fault current indicator for an electric cable, said indicator comprising a semiconductive support wrapped around said cable and including a pair of magnetic pole pieces, a sealed housing mounted on said support, a rotor within said housing, a magnetic force responsive means embedded within said rotor in operative relation to said pole pieces for rotating said rotor in one direction to a first position in said housing, and an electrostatic force responsive means mounted on said rotor in operative relation to said support for rotating said rotor in the other direction to a second position in said housing.
Claim 12
Dependent Claim
100 words
A self-restoring fault current indicator for an electric cable, said indicator comprising a semiconductive support wrapped around said cable and including a pair of magnetic pole pieces, a sealed housing mounted on said support, a rotor within said housing, a magnetic force responsive means embedded within said rotor in operative relation to said pole pieces for rotating said rotor in one direction to a first position in said housing, and an electrostatic force responsive means mounted on said rotor in operative relation to said support for rotating said rotor in the other direction to a second position in said housing.
Claim 13
Dependent Claim
24 words
A fault indicator according to claim 7 including means remote from said indicator for visually determining the position of said rotor in said housing.
Claim 14
Dependent Claim
59 words
A fault indicator according to claim 8 wherein said means comprises light conductive members each having one end mounted on diametrically opposite sides of said housing and the other end accessible at a point remote from said housing, and a mask mounted on said rotor for movement into and out of the light path through said light conductive members.
Claim 15
Independent Claim
185 words
A system for locating a fault in an electric power distribution circuit, including a source of electric power, a power line and a circuit interrupter which deenergizes the line in response to a current surge caused by a short circuit fault occurring along the line, the improvement comprising a number of fault indicators connected to the line at spaced intervals, each indicator including a semiconductive support adapted to be mounted on the line and including a pair of magnetic pole pieces. a housing adapted to be mounted on said support, a rotor sealed within said housing, first means embedded within said rotor for rotating said rotor in one direction to a first position within said housing in response to normal voltage on the line, and second means mounted on said housing for rotating said rotor in the other direction to a second position within said housing in response to a fault current on the line. whereby on current interruption those indicators subjected to normal voltage will remain in the first position and those indicators subjected to a fault current will remain in the second position.
Claim 16
Independent Claim
185 words
A system for locating a fault in an electric power distribution circuit, including a source of electric power, a power line and a circuit interrupter which deenergizes the line in response to a current surge caused by a short circuit fault occurring along the line, the improvement comprising a number of fault indicators connected to the line at spaced intervals, each indicator including a semiconductive support adapted to be mounted on the line and including a pair of magnetic pole pieces. a housing adapted to be mounted on said support, a rotor sealed within said housing, first means embedded within said rotor for rotating said rotor in one direction to a first position within said housing in response to normal voltage on the line, and second means mounted on said housing for rotating said rotor in the other direction to a second position within said housing in response to a fault current on the line. whereby on current interruption those indicators subjected to normal voltage will remain in the first position and those indicators subjected to a fault current will remain in the second position.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |