US726846A - Insulator for electric wires. - Google Patents

Description

PATENTED MAY 5, 1903.

J. R. B INSULATOR FOR APPLICATION r1 BLE RIC WIRES ED JUNE 28 1 2 anoentog 6% M (It may UNITED STATES Patented May 5, 1903.

JQSEPI-I R. BELL, OF PECKVILLE, PENNSYLVANIA.

INSULATOR FOR ELECTRIC WIRES.

SPECIFICATION forming part of Letters Patent N0. 726,84 8, dated May5, 1903. Application filed June 28, 1902. $e1'ial No. 113,683. o mode -l T0 all'whom, it non/y concern:

Be it known that I, JOSEPH R. BELL, a citizen of the United States, residing at Peckville, in the county of Lackawanna and State of Pennsylvania, have invented certain new and useful Improvements in Insulators for Electric Wires, of which the following is a specification.

This invention relates to insulators such as are used for stringing telegraph and telephone wires to poles, and has for its objects to obviate the necessity of tying wire, to pro vide a more secure and perfect attachment of the wires to the insulator, to simplify and facilitate the attachment to the insulator, to prevent the relaxation of wires by the process of fastening, to take up. the slack in the wires, and other objects, as are herein specified, and more particularly'pointed out in the claims.

To these ends the invention consists of the construction, arrangement, and combination of parts, as herein set forth, and shown in the drawings, in which Figure 1 is a side elevation of an exterior View of one of my insulators with a wire attached, parts being broken away to more fully show the position of the wire. Fig. 2 is a View in cross-section, taken on the line x a: of Fig. 1, the wire being removed. Fig. 3 is a side elevation of the body portion of one of my insulators, taken at right angles to that of Fig. 1. Fig. 4 is a-view, partially in crossseotion, taken on the line g of Fig. 1.

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

In the drawings, 1 denotes the lower or body portion of one of my insulators, and 2 denotes an upper or cap piece which is designed to be secured to the said body portion by means of the screw-threaded shank 3. The body portion is also provided with screwthreads 4, by means of which it is adapted to be secured to a wooden peg in the usual manner.

The screw-threaded shank 3 is divided into lugs 4 and 5 by means of a deep channel carrying the wire 6. The said channel has converging, sides 7 and 8, one of said sides being provided with a central fret 9 and the other side being provided with frets 10 and 11, by means of which the wire to be secured is kinked at its contacts with the said three frets, and it is arranged to be pressed down into bending contact with the said frets by means of the rim or petticoat 12 of the cap aforesaid. A recess 14 is provided at opposite ends of the channel for the wire 6, and when the cap is screwed down to its place the rim or petticoat l2 compresses the wire 6 into said recesses 14 at opposite sides, thus kinking the wire at 13 13, and thereby assisting to hold it secure in its position. The main or body portion of theinsulator is provided with the usual petticoat 15 and is provided with a tying-wire groove 16 to attach tapping-lines or branch lines by means of tying-wire and also for an emergency in case the cap or other parts of the insulator should'become broken. The cap has asimilar groove 17.

In attaching a wire to the insulator the Wire to be attached is drawnin a taut position in the vicinityof the insulator and in this position is laid into the channel provided for it. The cap is then inserted and screwed downward and by means of the impinging rim 12 on the wire forces it downward,'so that the frets 9, l0, and 11 aforesaid indent the wire with lateral bends. When the wire is taut, these bends will have a tendency to increase the tension upon it, and the cap 2 is held secure from turning by reason of the upward tension of the strained wire on the'rim 12 aforesaid. Where the wire is sufficiently taut, very little bending will take place in the vicinity of 13 13; .but should the wire become somewhat loosened additional screwing down of the cap 2 will take up the slack by causing the bends 13 13, as before mentioned.

l-Iavingthus described my invention, what I claim, anddesire to secure by Letters Patout, is

1.- The herein-described insulator consisting'of a body portion, a screw-threaded shank, a channel through said shank, the sides of said channel converging downward, and the said converging sides having frets thereon arranged to engage the wire when compressed within said channel, together with a cap arranged to be screwed onto said shank, and to compress the wire within said channel, substantially as and for the purpose specified.

2. In an insulator of the kind described, a body portion adapted to be secured to a peg, the upper end thereof terminating in a holding-shank, the said shank having a channel with converging sides, frets on the sides of said channel arranged in alternate positions for the purpose of kinking the wire to be held therein, substantially as and for the purpose specified.

3. An insulator comprised in a body portion having a channel with converging sides arranged to receive the wire to be insulated, the converging sides of said channel having frets running in the direction of the convergence and arranged in alternate positions, a cap arranged to be secured over said body portion, the edges of the cap extending over the openings of the channel aforesaid, whereby the Wire inserted in said channel is compressed into a tortuous shape, substantially as specifled.

4. An insulator of the kind described comprised in a main or body portion substantially cylindrical in form having an internallyscrew-threaded recess in one end thereof, and a channeled shank at the opposite end thereof, the sides of said channel in said shank converging, frets on the sides of said channel arranged in alternate positions, screw-threads on the exterior of said shank, and a cap having interior screw-threads arranged to engage with the shank aforesaid and adapted when screwed on to compress the wire.

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

JOSEPH R. BELL.

\Vitnesses:

P. P. SMITH, D. G. MORAN.

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