US796977A - Insulator-pin. - Google Patents

Description

` PATENTED AUG. 8, 1905.

P. M. LOCKB.

INSULATOR PIN.

jaa/miba" @d 7n, La

wwf/nga UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed September 25, 1902. Serial No.`l24,766.

To al?, whom it may concern.'

Be it known that I, FRED M. LOCKE, of Victor, in the county of Ontario, in thefState of New York, have invented new and useful 1mprovements in Insulator-Pins, of which the following, taken in connection with the accompanying drawings, is a full, clear, and eX- act description.

This invention relates to improvements in insulator-pins for carrying high-potential insulators.

My object is to improve their construction, durability, and general utility by first increasing their mechanical strength and, second, by presenting more insulating-surface to come in contact with the insulator itself, and thereby add to the insulating qualities of the insulator; and to that end my invention consists in the several new and novel features of construction hereinafter described, and specifically set forth in the claims hereunto annexed. Itis constructed as follows, reference being had to the accompanying drawings, in whichi Figure 1 shows a section of a cross-arm and a high-potential insulator mounted upon my improved pin. Fig. 2 is a View of the insulating-pin mounted upon a cross-arm. Fig. 3 is a sectional view of the pin seen in Fig. l and a modified form of shaft and fasteningbolt.

a is a high-potential insulator having a downwardly-extending petticoat a', as shown in Fig. l, and provided with the usual central opening or recess.

The insulator-pin comprises a shaft preferably of wood, although it maybe constructed of any other material, and a skirt adapted to rest upon the upper end of the shaft I) and extend down sufficiently far to rest upon the cross-arm c. l

The shaft b is constructed of sufficient lengthso as to sit down into the cross-arm c or may run clear through and may be held in position by a lag-bolt c, or, as seen in Fig. 3, the bolt may extend clear through the shaft and be provided with a head on its upper end between the top end of the shaft and the inner face of the sleeves b', which may be made of porcelain, glass,earthenware,or similar material. The outer face of the upper portion of the sleeves b' is constructed so as to fit snugly in the inner face of the petticoat a. By constructing an insulator-pin in the form above shown and described it will be observed that the mechanical strength of the pin is increased by reason of the fact that the lower edges of the sleeves ZJ' rest upon the upper face of the cross-arm and the insulating qualities ofthe pin are increased by presenting more insulating-surface to corne in contact with the insulator itself. It will also be observed that by constructing a pin of this sort I am enabled to prevent the static discharge sufficient to burn off the pin at the point where it joins the cross-arm. The upper end only of the sleeve 5' is fitted on the upper end of the shaft b, while its lower end is flared outwardly and is separated from the pin to form an air-space between the sleeve and base ofthe pin and also for the purpose of affording a broad bearing for the sleeve upon the cross-arm. In like manner the petticoat a is fitted on the upper end of the sleeve, and its lower end flares outwardly and forms an air-space between it and the sleeve. A covering of insulating material may also be placed over the outer face of the insulationcap.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. The combination with a cross-arm, of an insulator-pin for high-potential insulators, said pin comprising a shaft secured to and projecting from the cross-arm, and a sleeve closed at its upper end, and resting on the shaft and having a portion at the upper end of equal diameter and fitting snugly with the shaft and its lower end resting upon the crossarm, but separated from the base of the shaft to form an air-space between the sleeve and shaft and to afford a broad bearing on the support around the base of the shaft.

2. In combination, a support, a shaft projecting from the support, a sleeve having its upper end closed, a portion of said sleeve at the upper end being of uniform diameter and fitting snugly on the upper end of the shaft, the remainder of said sleeve tapering and resting its loWer'end on the support and 'forming n air-Space around the base o't' the shaft, a )ettieoa et' porcelain or equivalent material resting on the upper end of the sleeve, being free from Contact with the sides of the sleeve, and having an outwardly-Haring lower end, substantially as described.

In Witness whereof l have hereunto set my hand this 30th day of August, 1902.

FRED M. LOCKE.

Witnesses:

VM. W. BURKE,

C. J. PELL.

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