US92299A - Improvement in telegraph-insulators - Google Patents

Description

J. W. FRY. TELEGRAPH INSULATORE Patented July 6; 1869.

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strut (Militia.

JOHN W. FRY, OF ELIZABETH, NEW JERSEY.

Letters Patent N 0. 92,299, dated July 6, 1869.

IMPROVEMENT IN TBLE GRAPH-INSULATORS.

The Schedule referred to in these Letters Patent and making part of the lame.

To all whom it may concern Be it known that I, J on W. Fm, of Elizabeth, in the count-yoi' Essex, and State of New Jersey, have invented a certain new and improved Insulator t'or Telegraph-Wires; and I do hereby declare that the following is a full and exact description thereot', refer- Like lettersot reference indicate correspondingparts in all the figures.

The nature of my invention consists in an insulator for attaching telegraph-wires, which holds the wire by compression in an elastic and: non-conducting sub stance, wherchy'it is firmly held, but in a manner which allows it to render as required, and prevents it from bing broken by chafing, as when against, a rigid ruetallic bearing, under the vibration to which it is subjected, and renders insulation more perfect.

An ordinary cast-iron spindle, A, is formed with a head, consisting of a fixed jaw, b, and a movable one, 0, connected therewith by lugs, or hinges, or other joint. that will enable it to be opened, to receive the wire, and securely locked, to retain it.

I prefer tocastthe loose jaw with projections, which will form a hinged connection, whereby it-opens t'orthe purpose required, and, when closed, be secured by the pin 1:, fig. 1, which is readily formed oi a bit of tt'lfi-w These jaws receive a block of India rubber, f, preferably of cylindrical shape, and of a size largerthan the space in which it, is lrcld,so that itis tbrciblycornprcssed when they are closed and fastened.

A radial incision, extending from the surface to the centre, receives the telegraph-wire d, which lies, as shown in the drawings, centrally embedded in the surro .olllg rubber. It; is held thercinby compression, with sutficient firmness, but with agrasp which yields, and allows it to render \vhcutension is applied.

The wire may be as rapidly strung with this insulator as with any other. It is held, as it were, in a cushioned .visc, which yields sutlicicntly to the flexion prmluced by wind and other causes, to prevent; its breaking or chafing, as when itis supp rted in contact. with ametal hook or other firstening. It is held by such close adhesion that no water can penetrate, and, by freezing, destroy insulation.

' The spindle may be inserted in the socket G, ordinarily used, or connected directly to the'arru ot' the telegraph-post.

The use of this insulator insures greater durability,

by rendering the breakage of the wire' less frequent, and a better working of the line, by its more perfect insulation, while the cost; is not. enhanced.

\Vhat I claim, and desire to secure by Letters Patent, is-

1. An insulator for telegraph-wires, formed to hold the. wire by the compression oi'a surrounding cushion of India rubber, or other non-conducting and elastic substance, substantially as set; forth.

2. An insulator, consisting of the spindle A, jaws b o, and India rubber f, arranged and operating substantially as and for the purpose set forth. 7

In. witness whereof, I have hereunto signed my name, in the presence of two subscribing witnesses.

' JOHN W. FRY.

Witnesses:

J. Fnasnn, I. A Dsvrs.

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