UNITED STATES PATENT OFFICE
WILLIAM F. JOBBINS, OF NEW YORK, N.Y.
TELEGRAPHIC AND TELEPHONIC INSULATOR.
SPECIFICATION forming part of Letters Patent No. 228,077, dated May 25, 1880.
Application filed February 16, 1880.
To all whom it may concern: Be
it known that I, WILLIAM F. JOBBINS,
a citizen of the United States, residing at New York, in the county and
State of New York, have invented certain new and useful Improvements in
Telegraphic, Telephonic, and other Insulators; and I do hereby declare
the following to be a full, clear, and exact description of the
invention, such as will enable others skilled in the art to which it
appertains to make and use the same, reference being had to the
accompanying drawings, and to letters or figures of reference marked
thereon, which form a part of this specification. My
invention consists of a novel construction of telegraphic insulators,
which will be fully understood by the following description. Figures
1, 2, and 3 are modifications. Fig.
4 is also a modification and shows a cross-bar of a telegraph-pole. Fig. 1 represents an insulator or cell, made chiefly of wood or other suitable material, with a thimble, B, made of paper. Fig. 2 represents a similar cell or body, A, having an inner thimble, B, and covering C both made of paper or pasteboard. Fig. 3 is similar to Fig. 2, with the covering C extending on the under side and made continuous with thimble B. Fig. 4 represents both a side view and transverse section of across-bar of a telegraph-pole, with the top thereof made of paper, as shown at D'. This bar has the pins E, for holding the cells A, which have a flaring skirt to better shed rain. The top of the cross-bar is also rounded to shed water, and thus prevent the same from standing and soaking into the surface of the bar, |
as is liable to be the case with a flat surface at the top of the bar. If
desired, the thimble B and paper covering C may be saturated or coated
with a suitable compound, either outside or between the layers of paper,
to keep the material from soaking water. In
the above-described Figs. 2 and 3 we have a threefold insulator-- the
outer coating, C, the main body A, and the inner thimble, B; and Fig. 1
is a duplex insulator, the thimble B being a complete insulator in
itself; and not liable to injury from exposure to the weather or from
wear. Having
described my invention, what I claim is-- 1.
An insulator having the main body made of wood and being incased with
paper prepared substantially as and for the purposes set forth. 2.
An insulator having the main body made of wood and provided with an
inner thimble, B, of paper prepared substantially as set forth. 3.
An insulator made of wood and coated on its outer surface and within its
aperture with paper prepared substantially as set forth. 4.
A wooden insulator coated with paper pulp or papier-mache, prepared
substantially as set forth. 5.
A cross-bar of a telegraph pole having the top covered with paper or
papier-mache, substantially as set forth. In testimony whereof I affix my signature in presence of
two witnesses. WILLIAM
FREDERICK JOBBINS. Witnesses: DANIEL
BREED, FRED. G. DIETERICH. |