Patent US4413304A successfully refreshed from Google Patents.
US4413304A
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Electromagnetic field compensated cable
Assignee: Individual
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Filing: 1982-05-20
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Granted: 1983-11-01
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Expires: 2002-05-20
Abstract
Abstract An electromagnetic field compensated cable having an electrically insulating casing (20, 40, 50) includes a structure (21-22, 41, 51) that effects cancellation of electric and/or magnetic field components due to current flow through the cable. One configuration includes a central twisted pair of insulated leads (21, 22) wherein only one end of each of the leads (23, 24) is terminated in a connector (25, 26). Another configuration has a central structure of conductive wire of alternating rectangular shape. (41, 51).
Inventors
- 👤 Martin E. Gerry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:24
CPC Classifications
H; H01; H01B; H01B7/00; F; F02; F02P; F02P7/00; F02P7/02; F02P7/021; F02P7/025; H01B7/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
91 words
An electromagnetic field compensated cable, comprising the combination of: an electrically insulating casing; and means, within said casing and integral with said cable, for effecting cancellation of field components generated by current flow in said cable, said means constituting a twisted pair of electrically insulated wires, said twisted pair having first and second ends, one of said twisted pair being electrically terminated at said first end and unterminated at said second end, the other of said twisted pair being electrically terminated at said second end and unterminated at said first end.
Claim 2
Dependent Claim
91 words
An electromagnetic field compensated cable, comprising the combination of: an electrically insulating casing; and means, within said casing and integral with said cable, for effecting cancellation of field components generated by current flow in said cable, said means constituting a twisted pair of electrically insulated wires, said twisted pair having first and second ends, one of said twisted pair being electrically terminated at said first end and unterminated at said second end, the other of said twisted pair being electrically terminated at said second end and unterminated at said first end.
Claim 3
Dependent Claim
21 words
The cable as stated in claim 1, wherein said means constitutes an electrical conductor having a shape resembling a rectangular waveform.
Claim 4
Dependent Claim
18 words
The cable as stated in claim 2, including a grounded coil of wire wound over the insulating casing.
Claim 5
Dependent Claim
18 words
The cable as stated in claim 1, wherein said means effects cancellation of magnetic and electric field components.
Claim 6
Dependent Claim
14 words
The cable as stated in claim 1, including electrical connectors effecting the electrical terminations.
Claim 7
Dependent Claim
18 words
The cable as stated in claim 1, including a grounded coil of wire wound over the insulating casing.
Claim 8
Dependent Claim
24 words
The cable as stated in claim 1, wherein said twisted pair constitutes a distributed capacity structure substantially along the entire length of the cable.
Claim 9
Dependent Claim
91 words
An electromagnetic field compensated cable, comprising the combination of: an electrically insulating casing; and means, within said casing and integral with said cable, for effecting cancellation of field components generated by current flow in said cable, said means constituting a transposed pair of electrically insulated wires, said transposed pair having first and second ends, one of said transposed pair being electrically terminated at said first end and unterminated at said second end, the other of said transposed pair being electrically terminated at said second end and unterminated at said first end.
Claim 10
Dependent Claim
91 words
An electromagnetic field compensated cable, comprising the combination of: an electrically insulating casing; and means, within said casing and integral with said cable, for effecting cancellation of field components generated by current flow in said cable, said means constituting a transposed pair of electrically insulated wires, said transposed pair having first and second ends, one of said transposed pair being electrically terminated at said first end and unterminated at said second end, the other of said transposed pair being electrically terminated at said second end and unterminated at said first end.
Claim 11
Dependent Claim
18 words
The cable as stated in claim 8, wherein said means effects cancellation of magnetic and electric field components.
Claim 12
Dependent Claim
14 words
The cable as stated in claim 8, including electrical connectors effecting the electrical terminations.
Claim 13
Dependent Claim
18 words
The cable as stated in claim 8, including a grounded coil of wire would over the insulating casing.
Claim 14
Dependent Claim
24 words
The cable as stated in claim 8, wherein said transposed pair constitutes a distributed capacity structure substantially along the entire length of the cable.
Claim 15
Dependent Claim
21 words
The cable as stated in claim 8, wherein said means constitutes an electrical conductor having a shape resembling a rectangular waveform.
References Cited (Backward Citations)
US2585907A
Cited
US3060428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |