US728442A

US728442A - Electric insulator.

Info

Publication number: US728442A
Application number: US10855602A
Authority: US
Inventors: Edward J Burke
Original assignee: JOHN F CUMMINGS; PETER W ANDERSON
Current assignee: JOHN F CUMMINGS; PETER W ANDERSON
Priority date: 1902-05-22
Filing date: 1902-05-22
Publication date: 1903-05-19
Anticipated expiration: 1920-05-19

Description

UNITED STATES Patented. May 19, 1903.V

PATENT OEEICE.

EDWARD J. BURKE, OE OLYPHANT, PENNSYLVANIA, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, OE ONE-HALE TO JOHN F. CUMMINGS AND PETER YV. ANDERSON, OE OLYPHANT, PENNSYLVANIA.

ELECTRIC INSULATOR.

SPECIFICATION forming part of Letters Patent No. 728,442, dated May 19, 1903.

Application filed May 22, 1902. Serial No. 108,556. No model.)

To all whom t may concern,.-

Be it known that I, EDWARD J. BURKE, a citizen of the United States, residing at Olyphant,in the county of Lackawanna and State of Pennsylvania, have invented certain new and useful Improvements in Electrical Insulators, of which the following is a specification.

This invention relates to insulators for elec- Io trical wires, andV has for its objects to provide an insulator in which no tying-Wire is required, to provide an attachment of wires to the insulator more secure than those heretofore in use, to provide a construction wherein the Weight of the wire assists in holding it taut in the fastenings, and other objects, as are herein set forth, and more particularly pointed out in the claims.

To these ends the invention consists of the 2o construction, combination, and arrangement of parts as specified, and illustrated in the drawings, in Which- Figure 1 is a side elevation of an exterior view of one of my insulators with a wire attached. Fig. 2 is a partial view in cross-section, taken on the line :c y of Fig. 1. Fig. 3 is an upper end view of one of my insulators, taken at right angles to that shown in Fig. l, the wire being removed. Fig. 4 is a top plan 3o View of one of my insulators with the wireholding wedges removed. Fig. 5 is a detail view in perspective of one of the fasteningwedges used in my device.

Similar characters of reference denote like and corresponding parts throughout the several views.

In the drawings, l denotes the body or principal member of one of myinsulators. It may be constructed from glass, porcelain, or other 4o non-conducting material. The upper end of the body portion is bifurcated or separated into two lips 2 2, each of which is recessed at 2 2 to accommodate the similar wedges 3 3 in attaching the wire 4 to be insulated. The

wedges 3 are provided with a ribbed or serrated groove 5, constructed for the purpose of grasping the wire 4 .when placed in position. The insulator in general is also furnished with a neck G, to which awire maybe attached in the usual way, if desired, and 5o will be found useful where branch lines are to be connected with the main line. My device is also provided with the usual petticoat 7 and with an interior screwthread 8, by means of which it is fastened to a peg 9, similar to the insulators in common use. Two wedges are to be used like that shown in Fig. '5 in attaching a wire to one insulator, and the wedges may be constructed from insnlating material or not, as preferred. It will 6o generally be preferred to make them from iron galvanized, so as to prevent corrosion. When galvanized with a coat corresponding to that of the wires to be insulated, they will resist the effects of atmosphere and water as long as the wire of the insulator itself, and when a new wire is to be inserted new wedges of course should be supplied. The wedges should be cut sufficient-ly thin at their lower ends 10 so that the wire to be held by them 7o receives the entire lateral pressure when they are inserted in the top of the insulator.

The operation of the device is as follows: The wires to be insulated are stretched taut in the usual way, lying in the vicinity of the points to which they are to be attached to the insulators. The Wire is then grasped between two of the wedges, with their grooves 5 coincidin g as near as may be, and the wire being held between the wedges in that position is 8o inserted with thewedges into the insulator, the wedges resting in the recesses 2 2 and being pressed therein until the wire is grasped tightly between them. The force of gravity acting on the wires tends to held them down in this position, and the fastening to the insulator is complete.

I do not wish to be confined to the exact structure and description set forth, as it is evident that the form of the wedges and of 9o the body of the insulator, as well as the fastenings to poles or pegs, may be greatly varied without departing from the general spirit of my invention.

What I claim, and desire to secure by Letters Patent, is-

l. An insulator constructed from a body portion of insulating material having an upbody portion pettiooated, and having serewthreads for attachment to a peg, of a recessed groove in the upper end of said body portion, and Wireholding members insertible within the recess of said body portion and arranged to be held in position by gravity, substantiaily as and for the purpose specified.

In testimony whereof I afx my signature in presence of two witnesses.

EDWARD'J. BURKE.

Witnesses: l

F. J. DE LAOEY, D. G. MORAN.