US918127A - Insulator. - Google Patents

Description

W. G. CLARK. INSULATOR. APPLICATION FILED JULY 27, 1906.

91 8, 127. Patented Apr. 13, 1909.

- FIG-2.

Z6 M @VENTO 74 BY r M Mm ATTORNEY.

" op w ri a re n in Lin J: zi J1} ii LJJZLAO WALTER G. CLARK, OF NEW YORK, N. Y.

INSULAT GB.

To all whom it may concern:

Be it known that l, /VAL'rn-s G. CLARK, of the city, county, and State of New York, have invented a new and improved lnsulator, of which the following is a full, clear, and eXact description.

My invention relates to improvements in wire insulators, and more particularly to insulators such as are adapted to carry transmission cables or heavy wires.

The object of my invention is to produce an exceedingly simple structure which can be cheaply and easily made, which will enable a line to be strung with great speed, and which will especially hold the wire in such a way that it cannot accidentally become loose. in cari ing out this idea I provide the top portion of the insulator with a wire receiving recess or hole and make the entrance to the said hole or recess of about the size of the wire or cable to be carried while the recess is itself larger. This enables me to put a binding of any suitable sort around the cable or wire, and within the hole, which obviously makes the cable larger than the receiving slot, and so it cannot accidentally get out. The construction of the insulator also enables me to insert a retaining place above wire or wires applied to the insulator and the said plate may be caused to engage the shoulders for confining the wires. The essential feature of my invention lies in the fact that the hole or recess which carries the wire or cable is larger than its entrance slot, and obviously the cross section of the wire recess or hole can be varied indefinitely without allecting the invention.

With this end in view, my invention consists of an insulator having a wire receiving hole or recess with an entrance slot through the insulator body which slot is'narrower than the aforesaid hole or recess.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar figures of reference indicate corresponding parts in all the views.

l igure l is a plan view of an insulator showing my improvements. 2 is a side elevation of the same. lg. 3 is a broken elevation showing a modified term of the wire recess, and 4 shows another modilication of the structure.

The insulator may be, so far as its body is concerned, of any kind whatever, and I have shown the ordinary petticoat 10 which can have a suitable base or fastening means, and

Specification of Letters Patent.

Application filed July 27, 1906.

Patented April 13, 1909.

Serial No. 328,01

which has a head 11, the latter being constructed so that by preference a groove 12 for a binding wire is formed on the neck of the insulator. lhis, however, is un'npor tant. The top of the insulator is slotted, as shown at 16, and the insulator is provided vith a transverse recess or hole let, in which the transmission cable or wire rests. As shown in ligs. 2 to l, it will be seen that this hole or recess 14 is wider than the slot 13, and the latter should be of such a width as to permit the transmission cable or wire to barely pass through into the recess or socket 14, after which any suitable binding device can be slipped in around the wire, and will prevent the latter from rising out oi? the slot 13.

In Fig. i I have shown the recess or socket 14 provided on its upper side wall with recesses 15 in which fastening wedges or devices can be placed, and in Fig. 3 l have shown shoulders 16 which will engage a strip of material driven in above the wire, and will effectually prevent its displacement. Obviously a strip of material driven in above the wires and under the shoulder 16, will confine the wires under the opening. it the opening is nearly filled with wires then the strip interposed between the wires and the shoulders would be rather thin wires and if only a few 'wires were in the opening, the thickness of the strip could be such as to press on the wires and against the shoulder. is shown in ll'g. l, the width of the strip applied between the wires and the shoulders would determine the capacity of the opening below the strip. By the invention presented, it will be observed that provision is made for the retaining strip confining the wires and engaging the wires and the shoulders of the insulator and by using plates oi dill'erent dimensions, the capacity of the opening below the plate may be controlled.

Obviously very many fastening devices can be used for securing the transmission cable or wire, and l have shown some of these in another application, which .i am filing simultaneously herewith, and in this case, I wish it clearly understood that the fastening means for the wire has nothing whatever to do with the invention. It is essential that the intake slot and the wire socket which communicates therewith extend across the insulator so that the wire can be readily inserted, and it is also necessary that the restricted slot should be of essentially the same length as the socket or wire hole so that the overhanging parts will not be too greatly weakened, and thus a fastening device of some kind can be safely secured be tween the wire and the narrower walls or" the socket. I am aware that attempts have been made to use insulators having a wire socket with a restricted intake, but so far as I know, such devices have had the walls of the wire socket more or less wedge shape, so that avedgingdevices could be placed between the wire and the walls, but this structure does not work well in practice because the strain on the wedging devices causes the walls to be very readily broken, and the insulator is thereupon worthless. In carrying out my invention, the wire receiving socket or hole should have its walls essentially parallel, so that there is no wedging strain on the walls near the opening therethrough.

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

1. Ian s'lot'and a restricted opening leading thereto, said insulator having a recess forming a con- 'tinuationof the receiving slot, and shoulders WARREN B. HU'rcHr soN, MARY A. S. MOELLER.

insulator having a wire receiving

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