US406041A - James c - Google Patents

Description

(No Model.)

J. G. GILL. INSULATOR FOR ELECTRIC WIRES.

No. 406,041. Patented July 2, 1889.

UNITED STATES 3 PATENT OFFICE.

JAMES C. GILL, OF COVINGTON, KENTUCKY, ASSIGNOR TO THE IIEMIN GRAY GLASS COMPANY,

OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 406,041, dated July 2, 1889.

.To 0. whom it may concern.-

Be it known that I, JAMES C. GILL, a citizen of the United States, residing in Covington, in the county of Kenton and State of Kentucky, have invented a certain new and useful Improvement in Insulators for Electric Wires, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming TO part of this specification.

My invention relates to an improvement in insulators for electric wires; and it consists in molding or casting a part of the Wire into a glass insulator.

I have illustrated my invention as applied to the ordinary telegraph-wires, but do not limit myself to the forms shown, as it maybe used in a variety of ways.

The usual method of fastening the main wire to the insulator is by means of a wire wound around the insulator and the main wire, thus tying the two together. The objection to this is that in a short time the wire and glass in contact therewith become 2 5 coated with dust and dirt, which in a measure holds moisture, and the insulator in wet weather becomes in this way coated with water, which acts as a conductor for the electric current, and perfect insulation cannot be 0 secured.

The object of my invention is to overcome this difficulty and at the same time make use of the ordinary standard glass insulator.

In the accompanying drawings, Figure 1 is 3 5 a vertical section of a glass telegraph-wire insulator with a portion of the wire cast in it. Fig. 2 is a horizontal section of the same. Fig. 3 is a vertical section of a glass insulator with a tie-wire cast in it. Fig. 4. is a horizontal cross-section of the same. Fig. 5

is a front elevation in section of a glass insulator with the tie-wire cast or molded into the top of the insulator. Fig. 6 is a top plan view of the same.

Like letters of reference indicate identical parts in the different figures.

In Fig. 1, A is a glass insulator, usually more or less conical in. shape, though of course the shape is not essential, with an interior opening B, screw-threaded to receive the plug or bar upon which it is supported.

0 is a wire cast or embedded in the glass, extending half-way round, the ends of the wire extending outward laterally in a line with the center of the insulator. The wire is so molded in the glass as to be entirely and completely embraced and surrounded by the glass and exposed at no point. WVhen this form of insulator is used, the line-wire is attached to the wire 0 by a loop, as shown at D, the line-wire being cut into sections between each pair of insulators. The ends are attached in the manner shown, thus forming a complete and continuous wire or line.

In Fig. 3 the insulatorA is provided with a groove F on one side, in which the line-wire rests.

G is a tie-wire molded in the glass, ex tending clear around the insulator, as shown in Fig. a, so as to give it a firm bearing or hold and avoid any strain upon the glass. The ends of this tie-wire G are twisted tightly around the line-wire H, thus holding it firmly and securely in place and completely insulating it.

In Fig. 5 the insulator S is provided with a groove or trough K, extending horizontally across its top or upper surface, in which the line-wire L rests.

A tie-wire M is cast or molded in the glass, its two ends extending upward 011 either side of the groove K, so as to embrace the line-wire L. hen the line-wire is in place, the ends of the tie-wire M are tightly twisted or knotted, and thus secure the line-wire firmly in place and perfectly insulated.

If desired, the tie-wires G or M may be twisted. in such a way as to hold the linewire in the groove and yet permit it to have more or less lateral movement in the groove. This is often convenient in stretching the line wire and securing an even tension throughout, instead of dividing it up into short sections, rigidly attached to each in sulator. 9 5

I am aware that it is old to partially or wholly cover the tie-wirewith an insulating combination with the main wires, substanmeterial, and do not here claim such a contially in the manner and tor the purpose (10- IO struct-ion. scribed.

Having described my invention, What I IAMFS C GILL 5 claim, and desire to secure by Letters Patent, J

i Vituesscs:

A glass electric wire insulator through GEORGE HEIDMAN,

which a portion of the line-wire is cast, in ALFRED M. ALLEN.

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