US848506A - Insulator-pin and support therefor. - Google Patents

Description

PATENTED MAR. 26, 1907. L. STEINBERGER. INSULATOR PIN AND SUPPORT THEREFOR.

APPLICATION FILED JULY 24, 1905A l/v VENTO/ Zoazlr )Siem erger TTORN S Louis STEINBERGER, or New 'Yoann- Y.,

msuLAroR-PIN AND suPPonT THEREFom 'Specicaton Vof Letters Patent.

Patented March 26, 1907.

Application iled-Ju1y24, 1905. Serial No.A 270,986.

T all whom it may concern:

Beit known that I, LOUIS STEINBERGER, a citizen of the United States, anda resident of the lcity of NewYork, (borough of Brookcounty of'-Kings ,and State of ANew York', have inventeda new and 'Improved-Insulator-Pin and Su port Therefor, of which the following is a ful clear, and 'eX- act description. v

` My invention relates to insulator-pins and means for supportingl the same7 my more particular objectbeing to .provide a type'of pin which can be' securely mounted upon a j cross-arm in' such manner as to protect the same against undue action of moisture and 1 also against strains due to 'the Weightl and1 to the swaying of the Wire or cable.

-Another object is to provide a support or crossearm of novel construction which will less readily retain snow or moisture and to insulate this support or cross-arm more effectually; especially the portion adjacent .to the insulator-pin.

j Y I have noticed that `most insulator-pins and their supports are so constructed land operated as to' afford a lodging-place for snow and moisture, and especially that they are liable to retain moisture intermediate of the base of the pin andthe suppor t. In other .30V

Y and its support and rapidly rots out the pins. and the support at their point of junction in y words, moisture is absorbedbetween the pin case they are made of wood. If the pin or the support be made of asubstance incapable of rotting, the moisture collect/ed at the points of. junction does considerable harm in that it weakens the ultimate dielectric strength of the insulator by exposing the same to danger. of an arc.

By my'construction i seek as far as practicable to exclude moisture from the l juncture between the insulator-pin audits with the vcross-arm'. vIt wi support and at the same time to 'provide a more effective insulating-surface .on the upper portion ofthe cross-arm.

' It is Well known that the w akest portion of insulator-pins'of the usual orm -when in operative position isat the poi t of juncture l be readily seen that by my construction thestrongestv portion of the pin is disposed at the point-mentioned, where strength is mostlyl needed, and owing'to the novel construction moisture is efectively' excluded from the juncture between the pin and its support. .A reinforcing mem- .like conformity as the lower ber of suchf form that it'will still further strengthen the pin at the point of juncture with the cross-arm is disposed within the pin.

In the accompanying-drawings, form-ing a part of this specification, likecharacters of reference indicate like parts in the severalviews v Figure 1 is a perspective showing one of my-improved insulator-pins mounted upon a cross-arna., Fig. 2 1s a vertical section through the pin and cross-arm7 taken upon -the line 2 2 in Fig. 1 looking in the direction indicated :by the arrow. Fig. 3 is a sideelevation of the pin, the cross-arm being shown in section in order to fully expose the shape ofthe pin7 and Fig. 4 isa fragmentary perpin being removed therefrom. Fig. 5 is a spective of the cross-arm Wi th the insulatorcentral horizontal section through the rod '10,

showing the square 10a thereof, the `latter serving as an anchorage. j

The cross-arm is shownat 4 and may be of wood or any other preferred material. The arm is provided with a Wedge-shaped portion 5, preferably integral therewith and out away sor-as to form a mutilation 6. Disposed centrally of this mutilation is an aperture 7 of portion of the supporting-pin. The latter is shown at 8 and is provided witha threaded portion 9,

.upon which Ithe insulator may be mounted. The general conformity of the pin S above the cross-armis that of a frustum of a cone.l A metallic rod lO is disposed centrally `through the pin and serves to strengthen the same. This metallic rod 10is provided with Ia square portion 10a and with enlarged frusto-conical portions 10b, all o f these portions vserving as an anchor-age. i

e pm 1s provlded with an enlarged por- 11, having 'a shelter 12 integral there-- 'ATh tion with, this shelter being of the conformity in* dicated in Fig. 3 and adapted to overlap the wedge-like portion 5 of the cross-arm. The

enlarged portion 11 is provided with a facet 13, relatively to which the shelter portions 12 overhang slightly, as will be understood from Figs; 2 and 3. The pin isfurther provided .with a cylindrical portion 14 and a frustoconical portion 15, these parts being integral.

with the main body of the pin. A washer 16, preferably of softrubber, engages the lower end of the frustofconical portion 15 and is engaged by` a frusto-conical` surfacev 17, with IOC to "7, which, as above explained, is of similar which an angular nut 1S is integrally formed. j theI insulating material known generally in This nut is threaded internally and fitted upon a threaded portion 19 of the rod 10.

The shelter portions 12 form an angle with each otheiyand thus present a substantially.

saddle-shaped top..

My invention is used as follows: To mount the` pin, it is raised above the cross-arm, the cylindrical portion 14 and the frusto-conical portion 15 being inserted within the aperture conformity therewith. The washer 16 is vnext threaded upon the rod 10 from below, and .the nut is run upward upon the thread- @s ed portion 19, so that the frusto-'conical portion 17 of the nut engages the cross-arm 4. Not only is the pin thus drawn downwardly, so as to make a close fit relatively to the cross-arm, but the nut is drawn upwardly, so as to make' also a neat fit, and the washer 16, of rubber, is squeezed, so as to spread and make a close engagement with e inner walls of the aperture. Awatertight joint very effective in practice is thus secured.

In the first place thewatefiowing down the pin upon reaching the shelter 12 is to a great extent directed off of the crossarm, so as to fall upon the ground. Some of the water would tend to penetrate into the mutilation 6 and aperture 7 but the projecting shelter12 prevents this. Moreover, the 4tapering' form of the conical portion 15 rende rs the fit-thereof and also the fit of the cylindrical portion 14 practically water-tight.

The fit of the conical portion 17 of the nut is such as to prevent any entrance of' water upon the under side ofthe cross-arm--that is to say, if water should drip alongthe under side of the cross-arm, being held thereagainst by its adhesion, and should reach the nut 18 the water is unable to penetrate, and even if it had a` tendency to do so it would be stopped by the washer 16, which being of rubber is not only an insulating member, but serves also asa gasket and maintainsthe interior of the aperture 7 completely dry at all times. The joint between the pin and the support is therefore water-tight.

It will be'observedthat lthe lockingmember 10, besides securely retaining the pinlin the cross-arm, also reinforces the insulating `member, thereby extending the arcing distance from the cable to the lowest point on the base of the pin.

The cross-arm. above described is of novel construction and will afford rigid bracing portions for the pin at points above that portion of the cross-arm Whereon the pin rests, thereby providing means for counteracting the lateral strains due to the `swaying of the wire or cable by strong winds.

I do not limit myself to any particular inaterial to be used in the construction ofthe device above described. Preferably, however, for the body of the pin and the nut I employ l the trade as electrose For the rod 10 any suitable metal may be employed.

I do not limit myself tothe exact shape or conformity of any part shown, as certain variations thereof may be made by those skilled .in the art without departing from the spirit material of which the rod 10 is made, nor even to the use of such a rod.

Having thus described my invention, I claim as' new and vdesire to secure by Letters Patent- 1. The `combination of a cross-arm promember provided with a portion projecting into said aperture, a metallic member connected with said portion and extending therefrom, said metallic member being threaded, and a frusto-conical nut fitting said aperture and threaded so as to engage said member thus projecting.

2. The combination of a cross-arm provided with a wedge-like sloping top and with an aperture, an insulatorepin provided with a portion entering said aperture and also provided with integral portions 'partially overlapping the top of said cross-arm and extending beyond. the edges of said aperture, said insulator-pin being provided with means for supporting an insulator.

3. As an article of manufacture, an insu- 1ator-pin having an enlargedbody portion, and reduced end portions, one of said end portions being provided with threads, and a metallic rod embedded within said body portion, said metallic rod being enlarged at its middle and provided with reduced end portions.

4. The combination of a cross-arm provided with an aperture, said aperture being large at the top and bottom of the cross-arm and small at a point intermediate of said top and bottom, an insulator-pin mounted within the top of said cross-arm and provided with a projecting portion, and a frusto-conical nut engaging said projecting portion and fitting within the bottom of said aperture for into close engagement relatively to said crossarm. v

5. The combination 0f a cross-arm provided with an aperture, said aperture being vlarge at its extremities and small at the points intermediate of said extremities, an insulator-pin mounted upon said cross-arm and extending into said aperture so as to fit into the portion thereof adjacent to one edge ofsaid'cross-arm, and a nut engaging aportion of said insulator-pin and provided with into the portion of lsaid aperture opposite said portion where said pin enters the same. l 6. The combination of a cross-arm having the purpose of wedging said pin and said nut or scope of my invention. Neither do I limit myself 1n all cases. to the use of metal or ,thev

vided with a frusto-conical aperture, a body roo TIO

a portion of suitable conformity to Wedge as to shelter the same, andfmeans or forcing said body member rmly into said oross-er1n- 7. The combination of a -cross-arm pro-y vided with en aperture, a, body portion provided With a portion extending into said aperture' and further provided'With portions l extending beyond the points of said aperture so as to prevent the entrance of Water there ,V

into, a metailie rod conneetedwith said body portion, and a, loekingrneniber.engagingsaid rod and said cross-arm so as to form a Water- 15 v tight jointtherebetween.

lin testimony whereofI I have signed my name to this speeiiicfation in the presence of two subscribing Witnesses.

- Louis ern'HQIBERGER.A

Witnesses:

WALTONHARRISON,

EVERARD B. MARSHALL.-

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