Electrical cord set having a magnetically identifiable conductor

Details Electrical cord set having a magnetically identifiable conductor Electrical cord set having a magnetically identifiable conductor

1984-05-23

1985-09-24

Grimley, A. T.

Electricity: conductors and insulators

Conduits, cables or conductors

Insulated

174115, 339113R, 339184M, H01B 736

Patent

active

045434484

ABSTRACT:
An electric cord set having a plurality of stranded conductors and a connection plug with an identifying connection element, such as a grounding pin, the identified connection element being connected to a conductor identified by having a higher magnetic permeability than the other conductors. Preferably, the ground wire is made of wire strands similar to the other conductors, but contains 1 to 3 auxiliary steel wire strands. In a method and device for manufacturing such a cord set, the cord is arranged next to a magnetic sensing element and rotated about the cord axis automatically while the permeability is sensed. The cord is then fixed in a position of highest or lowest detected permeability, so as to identify the location of the unique conductor, and the plug is then connected.

REFERENCES:
patent: 1992656 (1935-02-01), Fletcher
patent: 2306206 (1942-12-01), Dalgleish
patent: 3093434 (1963-06-01), Francis
patent: 3185953 (1965-05-01), Prifogle
patent: 3662257 (1972-05-01), Fujiwara
patent: 3805218 (1974-04-01), Voida
patent: 4188080 (1980-02-01), Streble
Alien Property Custodian; Becket, Charles Murray; Serial No. 218,848; published Jun. 8, 1943; "Electric Cables".

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