US1219746A - Insulator-bracket. - Google Patents

Description

L. F. KEPPLER.

'INSULATOR BRACKET.

APPLICATION HLED AUGE. 1915.

1 ,21 9,746 Patented Mar. 20, 1917.

UNITED STATES ATENT oFFIoE.

LEWIS r. KEPPLER, or manner, IOWA.

INSULATOR-BRACKETL Specification of Letters Patent. Patented lVIar, 20, 1917..

Application filed August 6,1915. Serial No. 44,099.:

i To all whom it may concern:

Be it known that I, Lnwrs F. KEPPLER, a

' citizen of the United States, and a resident of Harlan, in the county of Shelby and State of Iowa, have invented certain new and useful Improvements in Insulator- Brackets, of which the following is a specification. w

My invention relates to supports for electrical conductors, and particularly to brackets for carrying the insulators used in supporting "wires for telegraph, telephone, electric lighting and like purposes. It is the object of my invention to provide a simple, inexpensive and durable insulatorbrac'ket,

made entirely of metal so as to be practically indestructible; to provide means for com pensating the differences in expansion and contraction of the insulator and the bracket due to changes of temperature; .to provide means. for securely fastening the bracket to a support; and to provide means facili tating the removal of the bracket-from the support. My invention provides further a simple and durable pole-step, formed by omitting the head and'neck-portion of the bracket.

Constructions embodying my invention are illustrated in the accompanying drawings, in which Figure 1 is a perspective view of the cast-metal form of the bracket, Fig. 2 is a vertical sectional view of the same,

Fig. 3 is a perspective view of the formedsheet-metal type of thebracket, Fig. 4 is .a similar view showing the same adapted as a pole-step, Fig. 5 1s a similar view show-- ing a slightly modified form of the sheetmetal bracket, Fig. 6 is a transverse section on the plane ofthe line m-m of Fig. 3, and Fig. '2' is a detail vertical section through one side of the head of thebracket shown in Fig.8, illustrating the thread formed by corrugating the sheet-metal.

The bracket provided by invention is made entirely of metal, the general form thereof being substantially the same as that of t ordinary wooden b cket which it is a to replace, and comprising a wed s1 aped body-portion, a tapering or conical neck-portion, and a cylindrical headportion having an external. thread on which ordinary insulators of glass or the like may be screwed.

acket shown in ctal, being hollow ti 1 is tubular, Q1.

cred out so that cuiar in trans- .CZLUSQ.

pointed teeth 41 adapted to penetrate slightly the .body on which the bracket is secured, toprevent twisting of the bracket relative to the support by lateral pulling of a wire connected with the head. -In the outer side of the body 3 near the upper and lower ends thereof are holes through which spikes may be driven, asshown at'A in Fig. 2, in attaching the bracket to a support. The edges 5 of "the metal around said holes are turned slightly outward, so that theheads of the spikes will be spaced from the flat surface, thus enabling the insertion beneath-the heads of the claws of a hammer B, as indicated by dotted lines in Fig. 2, for pulling out the 'spikes when the bracket is to be taken down fromthe support. The opening at the lower end of the body permits the insertion of a lever, wedge or like instrument for prying the bracket oil the support, and this feature, together with the out-turned lips 5, enable the bracket to be taken down repeatedly without injury thereto. The thread for holding the insulator 0 upon the head 1 may be formed by' means of a wire 6 extending helically about the head, the ends 7 of the wire being secured, to the head'by inserting them through holes therein, as shown. The Wire-thread, not being integral with the body of the bracket, and not being rigidly attached thereto, .is sufiiciently yieldable to compensate the differences in the expansion and contraction of the bracket and insulator due to changes of tcmperatura'and thus prevents breakage of: the insulator from such The preferred form of the bracket is shown in Figs. 3, 6 and 7. Said bracket is made from sheet-metal, stamped andformed as shown, and differs from the before-described cast-metal bracket in several particulars, The outer part of the body 3 is semi cylindrical in section, as shown in Fig. 6, in stead of being rectangular having the outer side -fiat. At the edges of the body there e y eviclecl in aeclitiea t the teeth 4%, pertorute laterahy-extend; lugs 8 through which mile or screws may he passed to assist in securing the hedy to the suppe 5 and to prev t the sides or the hoey Irom spreading apart or away tr in each other, it" the inner side of the head and necL there narrow vertically extending slot 11 ferrnecl between the edges of that'portlon oi the metal she "om Wluch these are lTflEZLlB. [it the se of the neck there may grevitled at cm ade a tongue 9 Whlch oversecurecl thereto loy laps the other 1 a rivet or the lute, sehl' tongue and rivet serving to connect acent edges of the sheet and prevent them spreading apart. its a f 1 'ther meats connecting the two sides the sheulzle er te anrr l8 at ase er the neck there is previrlccl a rivet 10 which extends transthe srcles, as shown. The

lng the insulator on the 1 prorirtet by corrugating l to :n a helical ridge en the 'fitegral might cause in eekage 1 a screwed. tightly thereon,

when the parts expanded and contracted by changes er tempera" we, were it not that a ht coniprpcsiene 11E heacl is permitted hr e long'ltnchhal slet 11 which comp n- -.sheet-inetal type of thebracltet may else he made with the hecly rectan nlar in transverse section, as represented i 5. la salcl figure the thread for the insulator is indicated as its-med by. a helical Wire 6, Whieh may he used if desired, in the same manner as hereinhefore described in connectien with the term (if bracket shown in Figs. 1. and 2.

By emitting the head aid .neck-portien oi the bracket, any of the described forms thereof will co titute a 51111 5' Pelestep, as

having described my New anc {Leslie to secure h 7 Jetters 1:

I: claim ent is:

1. ln a metal iirsul portion shape in tr. ling; serraed edges support, and legs at saitl e the suppcrtfl vole-brad i a having it 5/. fl; J em L body-portion Sllbat ntially shaped in trensverse section and wet. age-shaped in side elevatien, the he idinal etlees beins' rated. to te a support and M aid edges z'E'lUt twisting of the hr;

relati to the sugprvia, ehee'eheing ei rate for

in}; attaching-inemhers driien thereinte.

3. A metal imlehracket having a hollow hotly-portion t-l-slr verse section and open at the leaner encl and at one site atljoinin a support means .i'fc-r attachin hrach o the sii i it means at the suppert-engagin 1teral spreathne; or m tween the support-engaging edges to pres i'reacling thereof,

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