US217427A - Improvement in telegraphic insulators - Google Patents

Description

B. TAYLOR. Telegraphio-Insulator. No. 217,427. Patented July 8,1879.

fiimwrmy film/2X02:

UNITED STATES PATENT OFFICE.

BURNLEY TAYLOR, OF HANOVER H.,,VIRGINIA.

IMPROVEMENT lN TELEGRAPHIC INSULATORS.

Specification forming part of Letters Patent No. 217,427, dated July 8, 1879 application filed February 28, 1879.

insulator tor telegraph-lines of cheap and simple construction, to which the wire may be readily attached or iemoved in constructing, 1

re )airin and chan in the locationot' the l .77 a a line by unskilled persons, and in which the iicwvire 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 diamctrical slot, through which the wire is passed, and a key of non-conducting material fitting in the slot and clamping the wire, and a metallic cap screw-threzuled to [it the thread of the insulatonplug, 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. 3, a vertical section through the center of the key and slot of the same; and Fig. 3, a perspective view or the plug, wedge, and cap detached.

The peg 4: is formed of glass or other suit able noncomlucting material, which has a screw-tln-ead, (1, formed upon its outer surface, and a diametrical groove or slot, a, extending downward a suitable distance, and having the bottom of the slot rounded, as shown in Fig. 2 ot 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 lam-conducting material, rounded or concaved at its lower ed go to conform to the shape of the bottom of the groove a, and havingin this instance projecting cars or lugs 13 I) exteiuling'outside the insulator-peg a short distance.

The cap 0 is spun up of sheet metal, andis 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 I) b of the wedge B, and serves to hold the key in place upon the-insulatorplug 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 I) 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 bot tom of the groove, and both being rounded, the wire will be firmly clamped by a sullieient extent of l iiulingsurface, 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 putup 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 0 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 see cure by Letters Patent An insulator for telegraph-wires consisting of a slotted glass peg having a screwthread formed upon its outer surface, a non-conducting key to lit the groove of the peg, and a me tallic cap to screw upon the peg and clamp the key upon the wire, substantial] y as de scribed, for the purpose specified.

BURNLEY TAYLOR.

Witnesses:

Wu. H. Ronm, O. O. MITOHELL.

Images