UNITED STATES PATENT OFFICE
BURNLEY TAYLOR, OF HANOVER C. H., VIRGINIA.
IMPROVEMENT IN TELEGRAPHIC INSULATORS.
SPECIFICATION forming part of Letters Patent No. 217,427, dated July 8, 1879; application filed February 28, 1879.
To all whom it may concern: Be
it known that I, BURNLEY TAYLOR,
of Hanover C. H., in the county of Hanover and State of Virginia, Have
invented a certain new and useful Improvement in Insulators for
Telegraph Wires, of which the following is a specification. The object
of my invention is to provide an insulator for telegraph-lines of cheap
and simple construction to which the wire may be readily attached or
removed in constructing, repairing, and changing the location of the
line by unskilled persons, and in which the “tie-wire” may be
entirely dispensed with, without adding to the cost of the appliance. The
invention consists in making the insulator-peg screw-threaded upon its
outer surface and provided with a diametrical slot, through which the
wire is passed, and a key of non-conducting material fitting the slot
and clamping the wire and a metallic cap screw-threaded to fit the
thread of the insulator-plug, which serves to hold the key in place and
clamp it securely upon the wire, as will hereinafter more fully appear. In
the accompanying drawings, Figure 1 is a side elevation of my improved
insulator; Fig. 2, a vertical section through the center of the key and
slot of the same; and Fig. 3, a perspective view of the plug, wedge, and
cap detached. The
peg A is formed of glass or other suitable non-conducting material,
which has a screw-thread, a, formed upon its outer surface, a
diametrical groove or slot, a’, extending downward a suitable
distance, and having bottom of the slot rounded, as shown in Fig. 2 of
the drawings, into which the wire is placed and over which it is
slightly bent to form a secure binding-surface. The
key B is formed of glass or other suitable non-conducting material,
rounded or concaved at its lower edge to conform to the shape of the
bottom of the groove a’, and having in this instance projecting
ears or lugs b b extending outside the insulator-peg a short
distance. The cap C is spun up of sheet metal and is screw-threaded to fit the thread upon the outer Surface of the insulator-cap, and bears at its lower edge upon the |
projecting
ears or lugs b b’ of the wedge B, and serves to hold the key in
place upon the insulating-plug and clamp it firmly upon the wire, by
which means the wire is securely held, even should the connection be
broken upon one side of the insulator. Instead
of the projecting ears b b’, the key may project slightly above
the top of the insulator-peg, so that the Cap may bear upon it, Which
will answer a good purpose. The
metal cap and glass key are very cheap and simple devices, which will
cost but little more than the ordinary tie-wire, and will much more
effectually serve the purpose of holding the wire, while they may be
quickly applied by the most unskilled persons.
The key being made to conform to the shape of the bottom of the
groove, and both being rounded, the wire will be firmly clamped by a
sufficient extent of binding-surface, while the crimp on the wire formed
by the rounded portion of the groove and key will serve as an additional
means of preventing the wire from slipping away from its connection
should it be broken upon one side only of the pole or support. The
wire maybe easily put up or taken down, and will be of great convenience
in running temporary lines or in making repairs, where expedition is of
the utmost importance. The
cap C may be cheaply spun up of sheet metal by well-known machinery, and
the glass key to fit the groove is of nominal cost, while both together
are cheaper and much more effectual than the screw-threaded glass Cap. I
claim as my invention and desire to secure by Letters Patent-- An
insulator for telegraph-wires consisting of a slotted glass peg having a
screw-thread formed upon its outer surface, a non-conducting key to fit
the groove of the peg, and a metallic cap to screw upon the peg and
clamp the key upon the wire, substantially as described, for the purpose
specified. BURNLEY
TAYLOR. Witnesses: WM.
H. ROWE, C. C. MITCHELL.
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