Improvements in Electric Insulators.
Year: 1898

page_text: Date of Application, 24th Jan., 1898---Accepted, 26th Feb., 1898
COMPLETE SPECIFICATION.
Improvements in Electric Insulators.
I, EDWARD RENAULT, of Waldo, in the County of Alachua, and State of Florida,
United States of America, Gentleman, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
This invention relates to insulators, and more particularly to that class of
insulators adapted for use in connection with telegraph and telephone lines.
The object of my invention is to provide an insulator for convenient and effective
use, which can be quickly and substantially placed in position, and as readily
removed whenever it becomes necessary. Also does away with the necessity for a
separate tie wire, and brings the strain of the line wire centrally across the support-
ing pin instead of at the side thereof, as is used in the ordinary form of insulators,
and precludes the possibility of twisting or wrenching the insulator from place.
Further my invention provides a clutch to prevent the line wire from slipping
through the insulator, and should the bulb be broken, will prevent the wire from
falling to the ground.
Further objects and advantages of my invention will be hereinafter more fully
described and particularly pointed out in the claims.
In the drawings forming a part of this specification
Fig. 1 is a perspective view of my invention applied to the cross arms of a tele-
graph pole.
Fig. 2 is a side elevation thereof.
Fig. 3 is a transverse sectional view, taken on the line 3-3 of Fig. 2.
Fig. 4 is a detail perspective view of the insulator bulb and supporting pin.
Fig. 5 is a modified form thereof.
Corresponding parts in the several figures are denoted by like numerals of
reference.
Referring to the drawings, 1 designates the threaded shank of the supporting
pin comprising the clamping jaws or members 2-2. These jaws are bent or
curved intermediate their ends, as shown at 3, providing an approximately circular
seat for the insulator bulb 4. To prevent this bulb from slipping side ways out
of its seat, it is provided with a circumferential groove 5, into which the semi-
circular shaped portion of the clamping members 2, fit snugly. This bulb may be
constructed in sections, as shown in Figs. 2 and 4, and each section provided with
a longitudinal groove 6, in which is seated a metal gripping plate 7, provided with
lugs or spurs 8.
To place my invention in use, it is simply necessary to screw the threaded
shank 1 into the cross arm, bracket, or wherever to be used; the opening between
the clamping members 2 forming a convenient place to insert a stick or other
implement for setting the pin to its position. The sections of the insulator bulb
are then seated between the clamping members, the line wire run through the
groove 6, and the jaws tightly clamped by means of the set screws 9. The wire is
thus firmly suspended in position without the aid of an extra tie wire, is held from
slipping through the insulator, by the action of the lugs or spurs 8 against said wire,
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