US740005A - Insulator-bracket. - Google Patents

Description

" to admit the circulation of air.

I UNITED STATES Patented September 29, 1903.

PATENT OEE-ICE.

JAMES F. GILLILAND, OE ADRIAN, MICHIGAN, ASSIGNOR TO ALBERT B. DICK, OF CHICAGO, ILLINOIS.

IN s u LAToR-BRACKET..

SPECIFICATION forming part of Letters Patent No. 740,005, dated September 29, 1903.

Application filed December 11.1902. Serial No. 134,769. (No model.) I

To all whom it may concern:

Be it known that I, JAMES F. GILLILAND, a citizen of the United States, residing at Adrian, in the county of Lenawee and State of Michigan, have invented a certain new and useful Improvement in Insulator-Brackets, of which the following ,is a full, clear, concise, and exact description.

My invention relates to an in sulator-bracketV of the kind intended to be fastened to the object is to provide an improved bracket which will bedurable, especially eective as an insulator, and capable of being quickly applied and very firmly heldin an upright position upon the pole or support. Heretofore it has been the practice to make these insulatorsV with a flat surface to be placed against the pole, and when they are applied the lineman usually outs away the side of the pole to provide a corresponding flat surface against which the insulator-bracket may be fastened. This Ipractice is objectionable in vthat considerable time and labor are involved in hewing such a iiat surface upon the pole,

and in any event the surface is more or less uneven, so that in wet weather moisture collects between the insulator-bracket and' the pole, tending to rot the parts and also impairing the insulation to a considerable degree.

In accordance with my invention I cut away longitudinally the central portion of the face of the insulator -bracket which is placed against the pole in such a way that said bracket willl contact with the pole only along lines near theyertical edges of said bracket, leaving a comparatively deep central channel or By this construction the bracket may be instantly iitted tothe curved surface of the pole and when fastened by bolts or spikes in the usual way will be held very firmly against turning. The actual contact-surface between the .pole and the-bracket, however, will be relatively small, so that the eectiveness of the device as an 'insulator will not be so greatly impaired in wet weather as would be the case where the vcontact-surfaces are large and uneven.

My improved insulator-bracket is shown in the accompanying drawings, in which-'- Figure l is a perspective View of the bracket, and Fig. 2 shows in cross-section the bracket lapplied to the pole. side of a telegraph or telephone pole; and its The bracket in general is of standard form and is provided with screw-threads a at the top, where the glass insulator may be screwed in place. The face b, which is applied to the pole, instead of being flat, as is usual, is grooved or recessed longitudinally, preferably in V shape, as shown, so that the bracket will contact with the pole only near the outer edges, leaving a comparatively deep open space or air-channel c between the pole and the bracket. It will be seen that the bracket will thus iit in an upright position upon the rounding surface of the pole e, where it is firmly seated and may be held in place in the usual manner by spikes or bolts passing into the polethrough holes d cl inthe bracket.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent, the following:

As a new article vof manufacture, awooden insulator-bracket' having a V-shaped longitudinal groove in its attaching-face and longitudinal'plane contacting surfaces adapted to engage the support only near their outer edges, the bottom of said groove forming an open drainage-channel throughout the length of the attaching-face when the bracket is attached to either a plane or curved support.

In witness whereof I hereunto subscribe my name this 9th day of December, A. D. 1902.

JAMES F. GILLILAND.

Witnesses:

WV. W. LEAcH, DE WITT C. TANNEE.

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