US1596152A - Electrical conductor - Google Patents

Description

Aug. 17, 1926.

C. E. CARTER ELECTRICAL CONDUCTOR Filed Nov. 29. 1924 IMPRCBNATA'D w/rn WATERPROOF GM 9N- avwentoz claw-ALE- carter;

Patented Aug. 17, 1926.

UNITED srArss I 7 1,595,152- PATENT OFFICE.

CLARK E. CARTER, 01 HOW, QUEBEC, CANADA, ASSIGNOB TO ALADDIN CINEMA CQKPANY, LIII'IED, OF MONTREAL, CANADA.

' ELECTRICAL CONDUCTOR.

Application fled November 29, 1924. Serial No. 752,915.

This invention relates to improvements in electrical conductors having for an object to provide a novelly constructed resistance conductor especially advantageous for use a in supplying electrical energy at a predetermined and required voltage to a receiving means or apparatus from a source whose voltage is the loading capacity of said receiving appa- 1U ratus.

It is likewise an equall important object of the invention to provi e a resistance conductor ofthe character mentioned wherein In order that the invention and its mode' of application may be readil understood by persons skilled in the art, have in the accompanying illustrative drawings, and in the detailed following: description based thereupon, set out one possible embodiment of the same.

In'these drawings:- V

Figure 1 is a perspective view of a length of my improve Figure 2 is a fragmentary side of the same having portions brokenaway and shown in section in order that the rela tive arrangement of the element be clearly shown. I

Having more particular reference "to the drawings, in connection with which like characters responding parts throughout, the improved device may be stated to comprise an electrical conductor 1, preferably formed of copper wire or other highly conductive ma-.

terial, such as is now common m-the art;

this electrical condncton in a coating of spirally wound-asbestos tape 2 which, as W111 be noted, completely envelops the same and is turn, and

,imp with a suitable water-proof prohibitively higher than resistance conductor; elevation f reference will designate cor-.

dielectric material 3, such material passing into the interstices of the braided or woven asbestos tape casing 2 and serving as an effectual water-proof and-insulating covering for the electrical conductor 1. A casing 5 formed of braided asbestos yarn is woven upon the water proof dielectric material 3 encasing and impregnating the asbestos tape 2.

Woun asbestos yarn asing 5 1s a resistance wire 4 the same being preferably formed of derman silver wire or other material whose pfloperties of electrical conductivity are poor;

this connection, it is coils of the resistance element 4 are spaced with respect to' each other which in conse uence, will ensure proper functioning of th1s member.

It is, of course, to 'be understood that the length of the resistance wire 4 wound spiral- 1y over the asbestos yarn casin ,5 will be a varied according to the desire reduction of voltage to be effected thereby.

About the. winding oftheresistance 4, a

casing of woven or braided asbeSlDS-yarn I 5 is then laid which if desired, may be impregnated with a water-proof dielectric solution or 'rnaterial, such as hereinbeforev indicated by the numeral 3, whereupon a covering or casing of braided or woven-cotton or silk 6 is then engaged over this second insulat' casing 5. w

a To secure practic constructionof a cable in accordance with my invention,

found. it extremely advantageous and beneficial to .the efliciency of the same'to employ asbestos coverings or casings consisting ofbraided or woven asbestos yarns; it being.

possible with this yarn to prov1de. aifully enveloping insulating casing at a minimum cost'andm a eriod of time much less than that required 1n the construction of casings of this particular nature formed of sheet or Y molded asbestos. 1bestoscasings for insulating a resistance is known, but/I have found that better results are obtained b loosely weavin' the yarn directly upon t e resistance e weaving of these cas' cost of manu acture thereof as well as producing a more compact and better-appear ng conductor. The loosel woven permit the spirally woun resistance wire 4 to, be imbedded therein, wh

d spirally about and, over the woven B to be noted that the 7 I have 90 The employment of as- '5'and 5 greatly reduces the reby the yarn-not no only projects between and insulates the wires of the resistance 4, but retains the latter in their proper spaced relation.

Innsage of the improved cable, it, of course, will be understood that one sideof an electrical circuit is connected to one end of the conductor 1 while the opposite side of such circuit is connected to one end of the resistance 4, the length of the complete conductor 1 as Well as the length of the resistance wire 4 being such-as to etiect the desired reduction of voltage from the elec-' trical source of Sn ply, such as conditions or preference may ictate.

Due to the fact that the electrical conductor 1 and resistance element 4 respectively are completely insulated with respect to each other, both throughthe medium of the casing of spirally wound asbestos tape 5 and the water-proof coating material 3, as well as the braided asbestos 5 it will be understood that dielectric actions will be practically eliminated and that the cable so pro duced will efficiently function for its intended purpose. Also, by reason of the heat insulating characteristics of the casing 5, the radiation of heat as between the conductors 1 and 4 will not he to such a degree as to injuriou'sly afiect either. Furthermore, by covering the cable' with the outer casing 5 of braided asbestos yarn, it will be understood that the heating of the complete cable to such an extent as to preclude handling of the same or as to burn the finishing covering a or casing 6 will be prevented.

Through braiding asbestos water proof coating material 3 as shown and over: the 1 asabove described, uniformity of thickness of'heat insulating material is attained without undue attention during the manufacturing rocess, and further, a roven highly satis actory means for proper y spacing the resistance element coils is formed. This together with the outer layer of braided asestos coacts with the remaining elements in the formation of a conductor having the desired resistance to heat radiation, ossessing flexibility of a degree facilitating manipulation, and so retaining a spirally wound resistance element that the original spacing ofthe coils is always assured.

Manifestly, the construction shown is capable of considerable. modification, and such modification as is within the scope of my claim, I consider within the spirit of my nvention.

I claim A cable comprising, a conductor, a conductor casing comprising a spirally wound asbestos tape, a'water proof dielectric material encasing and impregnating the asbestos, a braided asbestos yarn casing for the Water proof materialfa resistance element spirally .wound along and about and partially embedded in the braided vasbestos yarn, the coils of said resistance element being relatively spaced, a second casing of asbestos yarn braided over the resistance element and the first named braided casing, and a finish casing enveloping said second casing.

h In1 witness whereof I have hereunto set my CLARK ECARTER.

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