UNITED STATES PATENT OFFICE
HOMER BROOKE, OF NEW YORK, N.Y.
IMPROVEMENT IN TELEGRAPH-INSULATORS.
SPECIFICATION forming part of Letters Patent No. 154,451, dated August 25, 1874; application filed April 20, 1874.
To all whom it may concern: Be
it known that I, HOMER BROOKE,
of New York, in the county of New York and in the State of New York,
have invented certain new and useful Improvements in Insulators and do
hereby declare that the following is a full, clear, and exact
description thereof, reference being had to the accompanying drawings
and to the letters of reference marked thereon making a part of this
specification. My
invention relates to an improvement upon the commonly-used glass
telegraph-insulator. It consists of an insulator made of a single piece of glass,
and provided upon its top with projecting lugs or ears, under which the
telegraph-wire is held in grooves. These
ears each have a small groove under them, and these grooves are not on a
straight line with each other, so that, as the wire is passed into them,
it is curved or crimped to prevent its slipping longitudinally through
the same. In addition to
the ears or lugs upon the top, my insulator is provided with the usual
circumferential groove near the top, all of which will be hereinafter
more particularly described. One
object of my invention is to construct an insulator that will cost but
little, if any, more than those now commonly used, and one that will
effectually hold the main wire without the time, trouble, and expense of
tying the wire thereto (as is now done) by means of an additional piece
of wire. Another
object of my invention is to so construct the insulator that the wire
can be perfectly held at any angle without the use of such additional
wire above described. Figure
1 represents a side view, and Fig.2 a plan view, of my insulator. In the drawings, A represents an insulator made of glass, of the usual form, with its interior hollowed out from the base to near the top thereof, as shown at B, Fig. 1. This interior may or may not be provided with screw-threads for the purpose of attaching the insulator wherever desired. Near the top of the body A |
is
formed a circumferential groove, b. Upon the top of this body A are formed three or more
projecting lags or ears, C C C, as shown in Fig. 2. These ears are not
all formed on the same side, and the ends of those on the one side
project beyond the ends of those on the other side. Under
each ear is formed a small groove, a, into which the wire D lies, and,
when passed therein under the ears, it will be bent in a curved or
cramped manner, as seen in Fig. 2, and cannot easily slip or slide
through the grooves hence, is not liable to sag between the poles. In
case of the falling of the pole, or the detaching of the insulator,
should the wire become disengaged from under the ears, it can easily be
replaced by raising it above the insulator, and dropping upon the top
thereof and under the ears, without cutting the wire. Oftentimes
it is necessary to stretch the wire at an angle from one insulator to
the other--for instance, from the telegraph-office to the pole outside.
In this case the wire is first turned around the groove b, and then
through the grooves under the ears, so as to perfectly hold the wire. Having
thus fully described my invention, what I claim as new, and desire to
secure by Letters Patent, is-- 1.
As an article of manufacture, a telegraph-insulator made of a single
piece of glass, provided upon its top with the projecting ears C C C,
and grooves a, for holding the wire thereon in a curved or cramped
manner, all substantially as and for the purposes herein set forth. 2.
A telegraph-insulator made of a single piece of glass, and provided with
projections C C C and circumferential groove b, substantially as and for
the purposes set forth. In
testimony that I claim the foregoing I have hereunto set my hand this
11th day of April, 1874.
HOMER BROOKE. Witnesses:
EDWD.
SLACK, E. R. WHITNEY.
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