US1022121A - Insulator-pin. - Google Patents

Description

0. J. BOYLAND.

INSULATOR PIN. APPLICATION FILED NOV. 8, 1911.

1,022, 121 Patented Apr. 2, 1912.

Wt JEqy/azmj Inventor I Attorneys CLARENCE JOSEPH BOYLAND, OF- INDIANAPOLIS, II IlDIANA.

INSULATOR-PIN.

Application filed November 8, 191 1. Serial No. 659,216.

I To all whom it may con cemt' Be it known that I, CLARENCE J. Bor- LAND, a citizen of the UnitedaSt-ates, residing at I'ndianapolis, in the count'yf'of lilarion and State of Indiana, have invented a new and useful Insulator-Pin, of which the following is a specification, w I,

This invention relates to insulator pins, and has for its general object to provide an improved pin which will eliminate or remedy the objections and defects existing in the employment of the ordinary wooden or other pin of this character in common use; and to provide a simple, inexpensive, durable, practical and thoroughly etlicient device of this character.

It is the specific objeot'of this invention to provide apin of this character stamped from sheet metal to form a body having a resilient transversely contractible and expansible shank at one end and a transversely contractible and expansible threaded stem at the other end thereof, the shank being adapted to engage in the socket of a. cross arm of the usual telephoneor telegraph pole, or the like, forjthc suspension of. electric lines.

-According to present practice, the insulater is supported by a wooden or metallic pin having its shank inserted into a socket in the cross arm, this resulting in a number of objections and defects, among these being the tendency of the cross arm to rot. or decay around the socket due to the moisture in the vicinitv of the pin thus loosening the pin, the tendency of the wooden pin is to become broken or fractured, and in some pins the accidental breaking or fracturing of the insulator due to the expansionof the pin. These and other defects and objections are well known in the art and need not be itemized at length.

The above defects and objection present in the insulator pin in common use has prompted the invention of -a pin better adapted for the purpose and ehmmatmgor remedying many, if not all, of the existing objections and defects in pins of this character.

The result of the present invention is charactcrized by certain novel features of con struction which will appear hereinafter and which are pointed "out in the' appended claims, reference being bad to the accompanyi'ng drawing, wherein Figure 1 is an elevation of. the pm as in i Specification of Letters Patent.

- arianas, 191a.

5 an elevation of the insulator; p1n, con'struet use, parts being broken in accordance-withp-the; reseneaiaventiq "so I Fig. 3 is a plan view"of Itli'blankz from which the pin is formed. j

Referring in detail to the draflil' in similar reference charaete similar parts, the blank from insulatorpin is formed is designated at 12 comprising aplate ofggalvanized iron'or other metal of suitable thickness and qual-' ity. 'This blank is stampedorformedinto a shell pin comprising the bod y-fi having the shank 11 at one end. thereof formed by reducing the diameter of the pin and the threaded'stem 5 at the other,end thereof,

said blank beingbent. lo'ngitudinally *to' bring the longitudinal edges adjacent each other whereupon the pin is split+longitudinally throughout the length thereof. The

metal from which this pin is formed is of suitable resiliency and theedgesthereofi'are spaced slightly apart, thus permitting the body, shank and stem to be yieldable transversely thereof or to be transversely contractible and expansible. Th'e shank 11 is reduced in diameter to provide a shoulder 7 at the inner end thereof and is provided with a plurality of longitudinal sllts 9 eittending from the shoulder 7 to the outer end thereof forming a plurality of tongues 8 which have their adjoining edges spaced apart, the shell being thinner at the shank. These tongues being resilient provide an additional yielding or.contraction and expansion of the shank 11 for the purpose to be hereinafter described. From the tongues 8 of the shank 11 are struck a plurality of outwardly facing staggered spurs 10 which pfi'ojgct away from the outer end of the s an c.

To illustrate the application of the insulator pin, there has been shown in Fig. 1 a. portion of the cross arm at 13 having the vertical socket 14 drilled therethrough as forced therein to bring the shoulder 7 of the pin against the upper side of the cross arm. Upon the shank being inserted into the socket 14 the spurs or teeth 10 engagejin the socketto prevent the pin from being removed unless the tongues 8 are forced mwardly from the lower side of the cross arm.

In this manner the pin is readily attached to the cross arm and is retained in position,

'the spurs or teeth. alsoholding the shoulder 7 tightly. against the upper side of the cross arm. i

The insulator is designated at 4, being of the usual ty e ofconstruction, and the same is engag on the stem 5. of the pin,

and inasmuch as thisstem is contractlble and expansible' it will. be noted that the tendency to break or fracture the insulator is remedied or eliminated. It will also be noted that the slits 9 0f the shank of the pinform passages from the exterior to the interior 0 the shank thus permitting-the moisture in the vicinity of the socket to es.- cape into the interior of the pin to facilitate the drying of the cross arm and therefore prevent the rottening-or decaying thereof.

It is known that insulator pins have heretofore beenformed of metal andl do not broadly claim a metallic or a hollow pin, but i What I,d0 claim and desire to protect by Letters Patentisfp v 1. An insulatnr in comprising: one part sheet metal ishe spl1t lo throughout its lengthiwith the es spaced 't-udinally versely contractible, one end of the'pin being reduced in diameter to form ashank and a shoulder at the inner end thereof, the

havinga plurality of longitudinal slits extending from the shoulder to the outer end of the shank to form yieldable tongues which have their adjoining edges spaced struck from the tongues which project away from the outer end ofthe shank.

2. An insulator pin comprising a one part sheet metal shell split longitudinally throughout its length, one end of the. pin be ing reduced in diameter to form a shank and a shoulder at the inner end thei'eofithe shank having a lurality ,of"l0ngitndinal shell beingth'inner at the shank, the shank apart, and a plurality of staggered spurs" apart whereby the pin as a whole is trans 30 I splits extending rom the shoulderto the outer-end of the shank to form yi'eldable tongues, anda plurality of spurs struck from the tongues:

Y In testimony that I claim the foregoing as" my own, I have hereto afiixed my signature in the presence of two witnesses. 1 CLARENCE J USEPH BOYLAND.

Witnesses: r

' FRANK ELLIS,

' VBENJ'AMIN BEACHE Earner.

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