US887107A - Wire-fastener for insulators. - Google Patents

Description

110.887,10?. PATENTEDMAYlz, 19de. P. M. Loom.

WIRE PASTBNBR FOR INSULAToRs.

APPLICATION IIL'ED NOV. 24, 1905.

f 1 C yg @Nm/Ey 4UNITED srnras Nr OFFICE.-

WIRE-FASTENER FOR ISULATORS.

electric conductor and tapering retainers 'embracing th'conductor and wedged into the flaring ends of the groove for fastening the conductor to the insulator.

. The essential purpose of my invention is -to providea simple and economical means for expeditiously attaching the electric convaus ductor to the insulators without the iiseof tie wires or-by providing the insulators with open sided grooves through wliicli the wires may be drawn and temporarily retainedas .the wires are strung from pole to pole, after which the tapering bushings or the retainers are forced into the flaring ends of the grooves and for frictionally retaining the wire therein.

-verse groove formed directlyl in its top.

A further object is to provide the tapering bushings with means to tie them together to prevent axial displacement from their respective sides.

In the draWings-Fgure 1 is a top plan of the insulator equip )ed wit-h my improved 'wire attaching device. Fig.. 2 is a transverse vertical sectional view through the insulator and Wire fastening device seen in Fig. 1.A Fig. 3. is a similar sectional view partly in elevation of an insulator having the trans- E ig. 4 is a perspective view of one ol the tapering bushings or'wire retainers seen in Figs. 1,2 and 3.

In order to demonstrate the practicability ofmy invention, I Ahave shown in Figs. l and 2 an insulator 1- which may be of any desired form or size and adapted to be supported upon a pin orl other support of the cross arm or pole not necessary to herein illustrate or describe as the manner of mounting these insulators is well` known. In this instance,

and upon which is fitted a ca -3- of metal Vor any other suitable material which is permanently secured to the boss -'-2 by corrugatingor roughening the 'contiguous faces Specification of Letters Patent.

Application led November 24, 1905. Serial No. 288,976. i

' radia Patented May 12, .1908."

and interposing a cementitious viilli'ng* as -4-.. This cap stance', is ina-de of nietalis provided-witha transverse groove -5- vopen at one side, )referably at the top and provided with aring ends for receivingthe. electric conductor as -G and tapering bushings orfrey tainers-7-'.

The open side of the groove --5-l substantially midway between its ends is comparatively narrow or slightly wider than the diameter of the wire to allow the latter to be easily inserted or removed therethrough, but the base of the`groove isfenlarged and is preferably circular in cross section and rovided with flaring or vconical ends in wliic i theta pering retainers eP- are fitted. It therefore follows that the base of the groove is under cut or of greater transverse width than the o )en side of the. groove which prevents lL displacement of vthe bushings 7-. These bushings or retainers -7- are preferably split longitudinally at 8 through one side and are provided with an aperture 9* i'or receiving the conductor -6- said bushings or retainers being slipped oyer the end ol the wire in portions with their smaller ends facing each other. or they may be made ol suitable spring material and. adapted to be sprung over 'the Wire by' opening up the split of these bushings, however, is not as essential as the tact that they are made to embrace and to slide upon the Wire so that lwhen Stringing the wires from pole to pole, the bushings or retainers which are to be fitted in the ends olI the grooves -5- may be spread apart a sullicient distance to allow the intervening portion of the Wire to drop into said groove after which the` bushings -7- are forced toward each other into the opposite tapering ends of the groove for locking the wire to its insulator.

In ordei to prevent the bushings from wearing loose axially from. each other, theyl may be provided with interlocking members and wires -l0 which in this instance, are

soldered to the adjacent ends of the bushingsv having their free ends adapted to be twisted one upon the other as shown in Fig. 2. It is evident, however` that many other devices may be employed for holding the bushings against axial displacement one from the other, and I, therefore, claim means broadly for etl'ecting such a result.

In Fig. 3, I have shown an insulator which Vin thisv in- ,y

The exact 'formation having a boss -2- in which is formed a groove .-5- which is of substantially the same form and for the same purpose as the groove 5-, the only difference bein that 1t is formed .directly in the body of insu ating material instead of in a sep arate cap as shown in Fio's. l'and 2.

at I claim is:

1. In combination with an electric conductor and its supporting insulator, a wire holding element on the insulator and provided with 'an under cut groove having tapering open ends and o posite retainers grasping t e conductor an inserted in the open ends of the groove and means to hold the retainers in operative position in said grooves.

2. In combination wlth an electric conduc to and its sup rting insulator, a metal cap i ted upon the ead of the insulator and rovided with a vtransverse groove in its to ace, 20 said groove being open at its upper si e, and ,tapering split bushin grasping the wire and movable le thwise t ereof and having their small ends -ven into the o posite ends of said groove, -whereby the bus ings are com- 25 pressed upon the wire.

In witness whereof I have hereunto set my hand this 16th day of November, 1905.

FRED M .LOCKE- Witnesses:

G. T. CURTIS, W. W. HIBBARD.

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