US673903A - Electric cable. - Google Patents

Description

Patented May I4, |90I.

un. 673,903. f

J. C. GULIJ.`

ELECTRIC CABLE.

(Application med Apr. Q, 189B.)

(lo Model.)

Ammyfys.

1" 15 Numsgncns op., mommwo.. wAsHmnfon. n. c.

n UNiTED STATESy PATENT OFFICE;

JOHN D.y GOUID, OF BROOKLYN, NEW YORK.

ELECTRIC CABLE.

SPECIFICATION forming part Of Letters Patent N 0 673,903, dated May 14, 1901.

Application filed April 6, 1898,.

To all whom it may concern:

- Be it known that I, JOHN D. GOULD, of the city of NewYork, borough of Brooklyn,in the county of Kings and State of New York, have invented a new and-Improved Electric Cable, of which the 4following'is a full, clear, and exact description. e

This invention relates to an improved construction of cables for conducting electric currents, particularly those for electric light- Reference is to be had to the accom panying drawings, forming a part of this specication,

in which similar characters of reference indicate correspondingparts in all the views.

Figures 1, 3, 5, .7, and k9 show diierent vforms of cable embodying my invention, and

Figs. 2, 4, 6, 8, andv 10 are cross-sections of the various forms.

In Fig. l I have shown two working-current conductors 1 2,v each having'a 'cover ofy insulating material, and a thermostatic or alarm 4 conductor ab, comprising afusible core or wire 3havi-ng an insulating-covering 4,' around which iswound acopper or similar conductor 5, the whole having an insulating-covert.

'The wires or conductors 3 5 are designed to y be connected with a fire-alarm system.,` The several conductors are wound spirally together,so that the thermostatic conductor,

` or rather its covering, is arranged between the working-current conductors, and consequently engages therewith throughoutV the length of the cable. 'lhe vcombined cable has an insulating-cover 7, and in order to make the combined cable substantially round I have shown a dummy or cord 8 as opposing the Serial No. 676,626. (No model.)

thermostatic conductor, as plainly indicated in Fig. 2. V

In Fig..3 I have shown the conductors 1 2 and the thcrmostatic conductor as arranged in a straight line, the thermostatic conductor of course engaging with the other conductors.

In Fig. 5 I have shown a working conductor 9 and the thermostatic conductor as twisted thereon.

In Fig. L7 in connection with the conductor 9 and the thermostatic conductor I have shown rtwo dummies or cords IO ll, employed simply to give a substantially round appearance to the combined cable.

The examples shown in Figs. 5 and 7 are designed for use when the ground is used as the return. The examples showninFigs. l and 3, however, are for a complete metallic working circuit.

In Fig. 9 I have shown what may be termed a trunk-line cable -that is, it contains a large number of working-current conductors l2, that may be used for various purposes,

and the several conductors are twisted together with a thermostatic conductor and the whole has a covering 13 of insulating material.

- In each example of my improvement a ther- Vmostatic conductor is arranged along thepecurrent to electric lights it is obvious that it forms a protector throughout the entire length of the cable, which is not the case when ordinary thermostats are placed in a building and at a considerable distance apart.

Having thus described my invention, I-

claim yas new and desire to secure by Letters and a single-thickness covering for theca- Y Patentl ble and against the inner'surf-ace of which ro. An electric cable, comprising a workingthe thermostatic conductor engages, substan-` v I eurrentconductor and ather'mostatic conductially as specified. I l 5 tor', the said thermostatic conductor consist- JOHN D. GOULD. ing of a fusiblefcore anda Wire coiled around Witnesses: l

thecore but insulated therefrom and also in- Y. JNO. M. -RITTE R, sulated from the Working-current conductor, 'y C..R. FERGUSON.

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