Electricity: conductors and insulators – Anti-inductive structures – Conductor transposition
Patent
1988-08-23
1990-04-24
Nimmo, Morris H.
Electricity: conductors and insulators
Anti-inductive structures
Conductor transposition
178 45, 333243, H01B 734
Patent
active
049202332
ABSTRACT:
A cable for use in carrying electrical signals in the audio frequency range. The cable includes an elongate metallic core which can be positioned at the center of the cable. In the case of the coaxial cable, a sleeve of a dielectric material is positioned about the core and a metallic shield is located outwardly of the sleeve and coaxially with the core. The cable also includes a layer formed of ferrite positioned between the sleeve and the shield which substantially increases the inductance of the cable without a corresponding substantial increase in the energy loss so that the cable exhibits substantially constant phase velocity characteristics across the audio frequency band. The ferrite layer can be formed by a series of discrete ferrite sleeves or the ferrite layer might be formed by an extruded thermoplastic having a high loading of ferrite powder. A method of using the cable is also disclosed.
REFERENCES:
patent: 863247 (1907-08-01), Yeatman
patent: 1672979 (1928-06-01), Fondiller
patent: 2228798 (1941-01-01), Wassermann
patent: 2787656 (1957-04-01), Raisbeck et al.
patent: 2929034 (1960-03-01), Doherty et al.
patent: 3191132 (1965-06-01), Mayer
patent: 3238477 (1966-03-01), Brueckmann et al.
patent: 3963854 (1976-06-01), Fowler
patent: 4079192 (1978-03-01), Josse et al.
patent: 4301428 (1981-11-01), Mayer
patent: 4383225 (1983-05-01), Mayer
patent: 4515826 (1985-05-01), Garner et al.
patent: 4587133 (1986-05-01), Shannon et al.
patent: 4593153 (1986-06-01), Kuhn et al.
patent: 4638272 (1987-01-01), Ive
patent: 4691081 (1987-09-01), Gupta et al.
patent: 4695127 (1987-09-01), Ohlhaber et al.
Mayer, Ferdy, IEEE Transactions On Electromagnetic Compatibility, vol. EMC-28, No. 1, Feb., 1986.
Visser, Leonard J., Belden Innovators, pp. 4-13, Spring 1984.
Cooper Industries Inc.
Nimmo Morris H.
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