US1162747A - Insulated support for electrical devices. - Google Patents

Description

A. W. BURKE.

INSULATED SUPPORT FOR ELECTRICAL DEVICES. APPLICATION FILE! MAR. I61M9l4.

1,162,747, Patented Dc.7,1915.

UNITED STATES PATENT OFFICE.

ALFRED W. BURKE, OF WILMINGTON, DELAWARE.

INSULATED SUPPORT FOR ELECTRICAL DEVICES.

means.

Specification of Letters Patent.

Patented Dec. '7, 1915.

Original application filed June 14, 1911, Serial No. 633,098. Divided and this application filed March 16,

1914. Seri.a.1No.825,042.

To all whom it may concern Be it known that I, ALFRED WV. BURKE, a subject of the King of Great Britain, residing at lVilmington, in the county of New Castle and State of Delaware, have invented certain new and useful Improvements in Insulated Supports for Electrical Devices, of which the following is a specification.

My invention relates to improvements in insulated supports for electrical devices, or parts thereof, consisting of means to be attached to insulators and the like, and has for its object the production of a simple, strong, and quickly attached means to be fastened to ordinary commercial types of high-tension insulators, such as used in connection with high voltage transmission.

This application is a division of my copending application filed June l4,v 1911, Serial N 0. 633,098.

In the accompanying drawing,-Figure l is a view of the cap, partially broken away, to be fastened to the insulator; Fig. 2 is another view of the same, partially broken, on the line II-II of Fig. 1; Fig. 3 is a sectional view of an incomplete ring, on the line IIIIII of Fig. 4, to secure the cap to an insulator; Fig. 4 is a plan view of the ring; Fig. 5 is a horizontal section on the line V-V of Fig. 6, showing the cap and ring mounted on an insulator; Fig. 6 is a view showing an insulator in elevation with the cap and incomplete ring mounted thereon; and Fig. 7 illustrates a plurality of caps secured to insulators, and supporting a switch as used in high voltage transmission.

Referring to the drawings, the insulator 8, shown in Figs. 6 and 7, is of the well-known high tension type, and has a circumferential groove 28 and a transverse groove 31 on the top. A close-fitting incomplete ring, 27, is sprung into the groove 28,and extends more than half way around the same so as toselfengage it; over the top of the insulator is placed a cap 29, the depending flange 40 of which projects down and incloses the incomplete ring 27. On the inner side of the end of the cap is a depending transverse ridge 32, which engages the groove 31 in the insulator preventing any turning of the cap. Passing through the flange 40 of the cap are set screws 30 firmly engaging the ring 27, as shown in Figs. 5 and 6, and immovably securing the cap to the insulator. On the top of the cap are webs 33, 34, in which are screw-threaded holes 35 and screws 36 which serve to secure switch elements 37, or other electrical devices, as shown in Figs. 6 and 7.

I claim: I

1. In a support f r electrical devices, the combination of a circumferentially grooved insulator, a cap having a depending portion, a detachable element self-engaging said groove, and means to secure said depending portion of the cap to said detachable element.

2. A switch insulator-cap, having a depending flange to receive an insulator head, a close-fitting incomplete ring to engage the insulator groove, and screws threaded through said flange and bearing against said ring.

3. In a support for electrical devices, the combination of a circumferentially and transversely grooved insulator, a cap having a depending portion to engage said trans verse groove, a depending flange on said cap, an incomplete ring in said circumferential groove, and means securing said depending flange to said ring.

In testimony whereof I afiix my signature in presence of two witnesses.

, ALFRED W. BURKE.

Witnesses JAMES W ROBERTSON, RUTH M. THAWLEY,

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