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To all whom it may
concern: Be
it known that we, FREDERICK M. LOCKE
and JOHN LAPP, of Victor,
Ontario county, and Honeoye Falls, Monroe county, in the State of New
York, respectively, citizens of the United States, have invented certain
new and useful Improvements in Insulators, of which the following is a
specification, reference being bad to the accompanying drawings. Our
invention relates to insulators for electrical circuit-wires, which form
a connection or support for the wire from the cross-arm upon a pole, and
which insulators consist of a petticoated glass body, a metallic hook
inserted into the body, and a non-conductor packing around the hook. The
object of our invention is to provide more perfect insulation; to
protect the insulating-surface from wetting and from snow or sleet; to
protect and preserve the cross-arm by inserting the insulator into the
lower side thereof; to provide a secure attachment of the insulator to
the cross-arm and at the same time have it easily detachable therefrom,
and to increase the length of the insulating surface between the
line-wire and the cross-arm. Our invention consists in the several novel features of
construction and operation hereinafter described, and which are
specifically set forth in the claims hereunto annexed. Figure 1 is a sectional elevation, on a vertical line, of
the insulator set, with the line-hook broken away just below the
insulator. Fig. 2 is a
bottom plan view of the insulator, showing the plan of the concentric
flanges. Fig. 3 is a sectional elevation of the insulator set, the line-hook being provided with a coarse screw-shank, the insulator threaded to correspond, and a packing interposed between the hook and insulator. This figure shows the hooks complete which are designed to carry the wires. Fig. 4 represents a front elevation of the line-hook, showing, also, in dotted lines the packing drawn over the head and neck and part of the body, and also showing in dotted lines the insulator and the packing in which the head and neck are embedded, Fig. 5 is a section horizontally of the line-hook on the line x x, Fig. 4. Figs. 6 and 7 show horizontal sections of two styles of flattened neck on line y y in Fig. 4. It
is constructed as follows: In the drawings, A represents a portion of a Cross-arm or other support for the line-wire, and B is the glass insulator let into the under side of the cross-arm. In this glass we make a groove, S, extending horizontally clear around the external periphery of the insulator. The lower part of this insulator flares outward, substantially as shown, and the bottom within the flare is broken up by the concentric grooves 1 2 and the central opening, 3, thereby creating three concentric flanges or petticoats D E F, by means of which the insulating surface across the bottom of the insulator is elongated according to the depth of the grooves. 1 is a frusto-conical or coarsely screw threaded recess within the body of the glass B of which 3 is the external opening. C is the hook or wire support consisting of a body, 4, a neck, 5, a head, 6, and the supporting prongs 7, the body being made either cylindrical or flattened, |
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and the neck may be either cylindrical or flattened and may be
considerably smaller in circumference than the body, as shown in Fig. 2;
or the neck may be in the form of a spiral at the bottom of the coarse
screw-threads as shown. The
hook C is insulated from the glass B by being embedded in the
non-conducting material K, which is filled into the recess around the
head and shank and part of the body of the hook by pouring in a mixture
of melted sulphur and sand; and to more completely insulate it, and,
furthermore, to protect the glass from breakage by the strain of the
wire thereon, and to provide an elastic cushion for the line-hook within
the glass, we cover the head and neck with a rubber sleeve, m, stretched
on in such a way as to conform itself and to fit close to the whole
surface of the head, neck, and body, and then when the hook is inserted,
either by screwing in or by being embedded in the sand and sulphur, the
hook can always give somewhat with the strain, and thus relieve the
glass. By making a coarse rounded thread, avoiding all sharp edges and
angles, the rubber will not be cut by screwing in, and it will conform
itself to the surface of the body, neck, and head much better, fitting
closer thereto. It will be observed that when the glass is secured
in the cross-arm by the removable transverse pins H the wire is most
perfectly insulated from the cross-arm by the rubber sleeve m and the
long or elongated petticoated lower face of the glass, so that even if
the grooves and petticoats become wet the loss of electricity would be
merely nominal, if any at all were lost. In fact, the insulation is so
perfect that our insulator can be safely used upon metallic cross arms. What
we claim as our invention, and desire to secure by Letters Patent, is-- 1.
A line-hook consisting of a body having a line-support at one end, a
cylindrical body, a flattened neck, and spherical head upon the opposite
end, substantially as described. 2.
The combination, with an insulator recessed to receive a line-hook, of a
line-hook consisting of a body having a line-support at one end, a
cylindrical body, a flattened neck and a spherical head upon the
opposite end, and an insulating packing within the recess and around the
line-hook, head, neck, and a part of the cylindrical body, substantially
as described. 3.
The combination, with an insulator recessed to receive the line-hook and
provided with concentric petticoats upon its lower end outside of the
recess, of a line-hook consisting of a body having a line-support at one
end, a cylindrical body, a flattened neck, and a spherical head upon the
opposite end, and a non-conducting packing in said recess inclosing the
head, neck, and part of the cylindrical body, substantially as
described. In
witness whereof we have hereunto set our hands this 25th day of
September, 1888. FREDERICK
M. LOCKE. JOHN
LAPP. In
presence of- H.
P. DENISON, C. W. SMITH. |