US3703692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanically adjustable high voltage inductive reactor for series resonant testing
Assignee: Hipotronics Inc
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Filing: 1971-11-03
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Granted: 1972-11-21
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Expires: 1991-11-03
Abstract
Abstract Mechanically adjustable inductive reactor for series-resonant corona and dielectric testing of capacitive loads, such as, long lengths of high voltage electrical transmission cable which enable unusually long lengths of unusually high voltage cable to be tested conveniently and economically. The invention provides advantages when testing shorter lengths of cable at the usual voltage levels of 150,000 volts or 225,000 volts, but the advantages become greater at the higher voltages and longer lengths forseen in the future by the inventor. A mechanically adjustable high-voltage inductor is resonated directly in series with the cable capacitance of a long cable at high voltage. Three embodiments of mechanically adjustable, low flux-fringing, inductors are disclosed which are linear in inductance variation as a function of mechanical movement and are convenient and quiet to operate as well as being economical in amounts of steel and copper materials employed for a given electrical (kilovoltampere) rating.
Inventors
- 👤 Stanley G Peschel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:54
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/08; H01F29/10; G; G01; G01R; G01R31/00; G01R31/50; G01R31/58
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
292 words
A mechanically adjustable inductive reactor for testing capacitive loads, such as electrical cables comprising fixed frame means, a fixed U-shaped core section having a pair of legs and being secured to said fixed frame means, movable frame means, a movable U-shaped core section having a pair of legs and being secured to said movable frame means, said fixed and movable frame means holding the respective core sections with their respective pairs of legs extending toward each other to define two pairs of poles in opposed relationship with adjustable gaps between the respective pairs of opposed poles, a pair of windings, each winding surrounding a pair of opposed poles and the adjustable gap therebetween, a plurality of parallel feedscrews extending parallel with the legs of said core sections and extending between said fixed and movable frame means said feedscrews being outside of said pair of windings, common reversible drive means for simultaneously driving all of said feedscrews for simultaneously and equally adjusting the length of each of said gaps to adjust the inductance of said reactor, thrust bearings rotatably securing said feedscrews at one end only to said stationary frame means, the other ends of said feedscrews connecting with said movable frame means in threaded engagement therewith for moving the legs of said movable core section toward and away form the legs of said fixed core section, said other ends Of said feedscrews and said movable frame means being free to move laterally with respect to said fixed frame means allowing said movable frame means together with said movable core section to move laterally in response to the magnetic attraction between the pairs of opposed poles to bring the pairs of opposed poles into direct alignment one with another within the respective windings.
Claim 2
Dependent Claim
292 words
A mechanically adjustable inductive reactor for testing capacitive loads, such as electrical cables comprising fixed frame means, a fixed U-shaped core section having a pair of legs and being secured to said fixed frame means, movable frame means, a movable U-shaped core section having a pair of legs and being secured to said movable frame means, said fixed and movable frame means holding the respective core sections with their respective pairs of legs extending toward each other to define two pairs of poles in opposed relationship with adjustable gaps between the respective pairs of opposed poles, a pair of windings, each winding surrounding a pair of opposed poles and the adjustable gap therebetween, a plurality of parallel feedscrews extending parallel with the legs of said core sections and extending between said fixed and movable frame means said feedscrews being outside of said pair of windings, common reversible drive means for simultaneously driving all of said feedscrews for simultaneously and equally adjusting the length of each of said gaps to adjust the inductance of said reactor, thrust bearings rotatably securing said feedscrews at one end only to said stationary frame means, the other ends of said feedscrews connecting with said movable frame means in threaded engagement therewith for moving the legs of said movable core section toward and away form the legs of said fixed core section, said other ends Of said feedscrews and said movable frame means being free to move laterally with respect to said fixed frame means allowing said movable frame means together with said movable core section to move laterally in response to the magnetic attraction between the pairs of opposed poles to bring the pairs of opposed poles into direct alignment one with another within the respective windings.
Claim 3
Dependent Claim
292 words
A mechanically adjustable inductive reactor for testing capacitive loads, such as electrical cables comprising fixed frame means, a fixed U-shaped core section having a pair of legs and being secured to said fixed frame means, movable frame means, a movable U-shaped core section having a pair of legs and being secured to said movable frame means, said fixed and movable frame means holding the respective core sections with their respective pairs of legs extending toward each other to define two pairs of poles in opposed relationship with adjustable gaps between the respective pairs of opposed poles, a pair of windings, each winding surrounding a pair of opposed poles and the adjustable gap therebetween, a plurality of parallel feedscrews extending parallel with the legs of said core sections and extending between said fixed and movable frame means said feedscrews being outside of said pair of windings, common reversible drive means for simultaneously driving all of said feedscrews for simultaneously and equally adjusting the length of each of said gaps to adjust the inductance of said reactor, thrust bearings rotatably securing said feedscrews at one end only to said stationary frame means, the other ends of said feedscrews connecting with said movable frame means in threaded engagement therewith for moving the legs of said movable core section toward and away form the legs of said fixed core section, said other ends Of said feedscrews and said movable frame means being free to move laterally with respect to said fixed frame means allowing said movable frame means together with said movable core section to move laterally in response to the magnetic attraction between the pairs of opposed poles to bring the pairs of opposed poles into direct alignment one with another within the respective windings.
Claim 4
Dependent Claim
292 words
A mechanically adjustable inductive reactor for testing capacitive loads, such as electrical cables comprising fixed frame means, a fixed U-shaped core section having a pair of legs and being secured to said fixed frame means, movable frame means, a movable U-shaped core section having a pair of legs and being secured to said movable frame means, said fixed and movable frame means holding the respective core sections with their respective pairs of legs extending toward each other to define two pairs of poles in opposed relationship with adjustable gaps between the respective pairs of opposed poles, a pair of windings, each winding surrounding a pair of opposed poles and the adjustable gap therebetween, a plurality of parallel feedscrews extending parallel with the legs of said core sections and extending between said fixed and movable frame means said feedscrews being outside of said pair of windings, common reversible drive means for simultaneously driving all of said feedscrews for simultaneously and equally adjusting the length of each of said gaps to adjust the inductance of said reactor, thrust bearings rotatably securing said feedscrews at one end only to said stationary frame means, the other ends of said feedscrews connecting with said movable frame means in threaded engagement therewith for moving the legs of said movable core section toward and away form the legs of said fixed core section, said other ends Of said feedscrews and said movable frame means being free to move laterally with respect to said fixed frame means allowing said movable frame means together with said movable core section to move laterally in response to the magnetic attraction between the pairs of opposed poles to bring the pairs of opposed poles into direct alignment one with another within the respective windings.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |