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To all whom it may
concern:
Be it known that we, RALPH G. HEMIN-GRAY 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 outer 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 abroad surface that water running down the outside of the
insulator, will not be able to find |
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its way to
the supporting peg.
It is to obtain a more perfect insulation 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 flaring
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 described.
RALPH G. HEMINGRAY.
JAMES C. GILL.
Witnesses:
J. W.
BARTLETT,
C. L.
GRIFFITH. |
