US1564918A - Insulator clamp - Google Patents

Description

Dec. 8, 1925.

I J-. T. WILLIAMS INSULATOR CLAMP Filed Aug. 5, 1921 Patented Dec. 8, 1925.

UNITED STATES JOSEPH THOMAS WILLIAMS, 0 F SYRACUSE, NEW YORK.

INSULATOR CLAMP.

Application filed August 5, 1921. Serial No. 490,029.

To all whom it may concern:

Be it known that I, J osEri-r THOMAS WIL- LIAMS, a citizen of the United States, residing at Syracuse, in the county of Onondaga, State of New York, have invented certain new and useful Improvements in Insulator Clamps, of which the following is a description, reference being had to the accompanying drawing and to the figures of reference marked thereon.

This invention relates to clamping devices, and more particularly to an improved clamp for securing electric wires or cables to the usual glass insulators mounted on poles whereby such wires are properly supported by the insulators.

One of the objects of this invention is to provide a device which clamps both insulator and cable and which is designed to effectively hold the cable even when the clamping action 011 the insulator is impaired, due to shrinkage or wear of the latter. I

A further object of this invention resides in providing a clamping device which permits its use in connection with various sized insulators without substantially modifying the pressure of the clamp on the wire or cable.

Still another feature'of this invention resides in providing an assembled clamp of few parts which can be installed in the minimum time.

Yet another phase of this invention resides in providing a clamp formed with a plurality of cooperating clamping jaws for supporting a plurality of wires from the insulator.

A further object of this invention resides in providing a neat, simple clamp of few parts and of cheap cost.

These and other objects will be apparent from a perusal of the following specification taken in connection with the accompanying drawings.

In the drawings Figure 1 represents a side elevation of the clamp in position on the insulator and supporting the cable;

Fig. 2 is a front View thereof, the cable being shown in section;

Fig. 3 is a front view of the clamp alone, and

Fig. 4 is a side view of the clamp partly in section taken on the line 4-4 of Fig. 3.

Referring to the drawings in detail, the usual insulator 1 which is mounted on a pole or support, not shown, is provided with the ATENT QF'FIfiE'.

usual circumferential groove 2 to receive the clamp. The clamp comprises clamping members 3 and 4 pivoted together at their ends as at 5 to provide a hinged connection which not only permits the clamp to be quickly positioned on the insulator and cable, but also provides a means for permanently assembling the members of the clamp. These clamping members 3 and 4; immediately adjacent their pivotal connec tion 5, are curved or bowed outwardly. as at 6 and 7 about a central recess 8 to form a clamping jaw. Each bowed portion 6, 7 is formedWith an inwardly projecting lip 9, 10 almost closing the recess 8. This recess may be given any desired shape and size to correspond to the size of cable 11 to be supported.

The clamping members 3 and 4 are further provided with a second recess 12 similarly formedto provide a second cable clamping jaw. In the present form, this second aw 12 is preferably made substantially square and about the same size as the clamping jaw 8. By so forming or recessing themeinbers 3 and 4, a neat and attractive design is afforded while at the same time, considerable metal is saved.

At their free ends, the clamping members 3 and at are curved or bowed outwardly as at 13 and 14: to form a substantially large jaw 15 to clamp about the circumferential groove 2 of the insulator.

The outer end of each of these bowed portions 13 and 14; is provided with an ear or lug 16, 17 having registering perforations to receive the clamping bolt 18 whereby the members are clan'iped to the cable and insulalor.

From the foregoing description, it will be evident that in positioning the clamp, the bolt 18 is removed and the clamp moved about its pivot 5. The clamp is now positioned so that the cable 11 is disposed in the recess 8, the bowed portions 13 and 14 of the clamping members 3 and 4 passing around the circumferential groove 2 of the insulator. The bolt is next inserted and the nut threaded thereon until the desired clamping pressure is secured.

Since the relatively small clamping jaw for the cable is next to the pivotal connection of the clamp, it is evident that if the insulator wear or shrink and the hold of the bowed portions 13, 14 become loose, the grip the two 1 Ill) of the clamp 8 on the cable will still be effective. So also for the same reason, the clamp can adjust itself to varying sizes of insulators without greatly affecting the clamping pressure on the cable. Furthermore, by providing the additional recess 12, the clamp is made lighter, considerable metal is saved, and a second pair of clamping jaws are pro vided for supporting a second cable or wire, ifnecessary, of another size or the same size. From the foregoing it is manifest that the pivotal or hinged connection 5 can be of any desired construction, provided it func 'tions as the fulcrum for the two levers l3 i L that I do not limit or confine myself to the precise details of construction herein described and illustrated, as modifications and variations may be made within the scope of the appended claim.

Having thus described the present invention, what I claim as new and desire to se cure by Letters-Patent, is

A device of the class described comprising two members hinged together at their ends and provided with clamping means at their free ends, said members having curved opposed clamping jaws adjacent the hinged ends thereof adapted to clamp 21 cable, and curved opposed clamping jaws adjacent the free ends thereof adapted to engage an insulater, said cable clamping jaws being relatively small, and said members between the cable clamping jaws and the insulator clainp ing jaws being spaced whereby the cable may be snugly clamped by the jaws engaging the same, said cable serving to keep said members in spaced relation.

In testimony whereof,I affix my signature.

JOSEPH THOMAS VILLIAMS.

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