Patent Office
Reprinted from "Crown Jewels of the Wire", May 1993, page 4
RALPH G. HEMINGRAY, OF COVINGTON, KENTUCKY, AND JAMES C. GILL, OF MUNCIE,
INDIANA.
INSULATOR FOR TELEGRAPH-WIRES.
SPECIFICATION forming part of Letters Patent No. 496,652, dated May 2 1893.
Application filed January 3,1893. Serial No. 457,057. (No model)
To all whom it may concern:
Be it known that we, RALPH G. HEMINGRAY, of
Covington, county of Kenton, State of Kentucky, and JAMES C. GILL, of Muncie,
county of Delaware, State of Indiana, citizens of the United States, have
invented certain new and useful Improvements in Insulators for Telegraph-Wires
and the Like, of which the following is a full, clear and exact description,
reference being had to the accompanying drawings, forming part of this
specification.
Our improvements relate to insulators in which means are devised
to obtain as perfect insulation as possible, and to prevent the water which
collects on the insulator during rains, from effecting the insulation, by coating the surface of the insulator and thus
forming connection between the wire and the insulator support.
In the
drawings:-- Figure 1 is a side elevation of our improved insulator. Fig. 2, is a
central vertical section of the same.
A, is the body of the insulator made of
glass, porcelain or other suitable insulating material.
B, is the usual groove
for the tie-wire, by which the main wire is secured to the insulator. The
insulator is molded with a screw threaded recess C in the usual way, by means of
which the insulator is secured to its support. The insulator shown is further
provided with what is known as a "double petticoat," which consists of the inner shield
D and the
other shield E, with the recess a, between the two shields or
"petticoats." This double shield or double petticoat arrangement, has
been long in use, to present a broad weather protected surface between the lower
outer edge of the insulator and the support, the idea being to obtain such a
broad surface that water running down the outside of the insulator, will not be
able to find its way to the supporting peg.
It is to obtain a more perfect
insulator than has been obtained by this arrangement, that our invention is
directed. To accomplish this result, we mold or secure at the lower edge of the
glaring bell-mouth of the insulator, a series of lugs or teats b, b. These teats
are arranged in series around the lower edge of the insulator and preferably so
close together, as to attract and receive on their rounded points, all drops of
water that may run down the sides of the insulator. With this construction the
teats b attract and draw to their points, where they drop off one at a time, all
drops of water which would otherwise gradually extend themselves by capillary attraction over the inner surface of the insulator. We find in practice
that a single row of these teats arranged on the lower edge of the insulator, is
sufficient, but when desired, of course the inner shield D could be provided
with a similar series of teats.
Of course we do not wish to be limited to the
particular class of "double petticoat" insulators shown in the
drawings, as our series of teats can be formed on the lower edge of any of the
well known forms of insulators.
Having thus described our invention, what we
claim, and desire to secure by Letters Patent, is --
An insulator, provided with a
series of teats at the lower edge of the insulator shield, to attract and gather
at their points the drops of water running down the outer surface of the
insulator, substantially as desired.
RALPH G. HEMINGRAY.
JAMES C. GILL.
Witness:
J. W. BARTLETT,
C. L. GRIFFITH.
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