US872756A - Insulator. - Google Patents

Description

No. 872,756. PATENTED DEG. 3, 1907, F. C. SGHERBR n H.` C. FASHBAUGH.

I'NSULATOR.

APPLIUATION FILED 00T. 19, 1906.

A f g UNITED STATES PATENT OFFICE,

FREDEROK C. SOHERER AND HENRY C. FASHBAUGH, OF OOLUMBIANA, OHIO.

INSULATOR.

Specification of Letters Patent.

Patented Dec. 3, 1907i,

Application filed October 19, 1906. Serial No. 339.650.

of the United States of America, residing at Columbiana, in the county of Columbiana and State of Ohio, have invented certain new and useful improvements in Insulators, of which the following1 is a specification, refer ence being had therein to the accompanying drawing.

This invention relates to insulators for electric wires, and more particularly to that class of insulators used upon poles supporting telegraph and telephone wires.

The primary object of the invention is to provide an insulator to which wires may be readily attached and securely held without the employment of tie wires.

A further object of the invention is to provide an insulator comprising a body portion of vitreous material having a slot to receive and. support a wire, and a removable cap of non-conducting material applied to the body portion in such a manner as to confine and secure the wire wit-hin the slot of the body portion.

The construction of the improvement will be fully described hereinafter in connection with the accompanying drawing which forms a part of this specification and its novel features will be defined in the appended claims.

In the drawing, Figure l is a side elevation of an insulator embodying the invention, Fig. 2 is a vertical sectional view of the same, Fig. 3 is a front elevation of the insulator with parts indicated in dotted lines, and Fig. l is a side elevation of a modified construction of the removable cap.

The reference numeral 1 designates the usual wooden pin secured upon a telegraph or telephone pole and threaded at its upper end for the attachment thereto of an insulator comprising a cup-shaped body portion 2, of vitreous material, and a removable cap 3, of non-conducting material, preferably of mica. The cup-shaped body 2 of the insulator is internally threaded to adapt it to be screwed upon the pin l and has its upperV portion l externally screw threaded to engage internal threads 5 formed within the cap 3. The insulator 2 is formed along one side with a transverse recess 6 communicating with a slot 7, formed in the outer surface of the insulator opposite the recess and extending throughout the length of said recess'. The

wire Svr is applied to the insulator by passing it through the slot 7 into the recess 6, the latter being of a depth to receive the wire and support it between its side walls. The recesses o and slots 7 produce an angular slot in the side of the insulator into which the conducting wire is received, the cap when in position on the insulator having its lower edge projecting below the slot 7 so as to hold the conducting wire within the recess 6.

The cap 3 is slightly flared at its lower end y to adapt it to fit down over the wire after the latter is in position upon the insulator and the lower edge of said cap bears upon the wire at the opposite ends of the recess,- where slight bends may be formed in the wire as shown at 9 in Fig. 3. Thus it will be seen that the wire is 'firmly secured to the insulator without the employment of a tie wire, thus saving the expense of providing tie wires in addition to the great saving of labor in securing the wires to the insulator incident to the use of such tie wires. Again in case of breakage of a wire between two poles the broken sections of wire will remain connected to the insulators. A further important advantage in the use of our improvement is that the absence of tie wires insures a continuous line conductor which cannot be disturbed by .the interruptions and slight breaks and vibrations which are incidental to conductor wires held upon insulators in the ordinary manner. This is a feature of special importance in the erection of telephone lines.

Vhile l prefer to employ glass in the construction of the body 2 of the insulator and molded mica in the manufacture of the removable screw cap, it is obvious that the cap may also be made of glass or any other suitable non-conducting material.

In Fig. 4, I have shown a modified construction of the cap 3, in which the cap is provided with a squared head 3u instead of the rounded head shown in the other figures, to facilitate its being turned by a suitable wrench or Spanner.

Ve reserve the right to make all such other minor changes in form and construction as may fall within the terms and scope of the following claims.

Vhat we claim and desire to secure by Letters Patent, is

In an insulator, a hollow exterior and interior threaded insulator body provided in its outer face with a transversely-extending slot terminating in a vertically-extending llO affaire@ recess, the bottom of said recess being in a when so positioned the lower end of the cap l5 plane below the lower Wall of the slot7 said recess and slot of a length equal to the length of the half of said member, said recess positioned in said member at a point approximately centrally of the inner and outer facesn thereof', said slot positioned at a point above the center of said member7 and a cap of nonconducting material provided with interior threads, said threads terminating at a point removed from the lower end of the cap thereby providing the inner face at the lower end or the cap with a smooth portion, said cap adapted to be mounted upon said body and being in alinenient with the bottom of the recess, said recess adapted to receive a conductor Wire and said cap adapted to @Online said Wire in said body 'when the cap is secured thereto In testinionj)T 'whereof We ailix our signatures in the presence of two Witnesses.

FREDERICK C. SCHERER. HENRY C. FASHBAUGH.

Titnessesz A. M. MoCoRMroir, JESSE J. TRESLER.

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