US503778A - Insulator for electric wires - Google Patents

Description

w. 1). TRIMBLE. INSULATOR FOR BLEGTRIG WIRES.

(No Model.)

No. 503,778. Patented Aug. 22, 1893.

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UNITED STATES PATENT OFFICE.

WVILLIAM D. TRIMBLE, OF I-IANESVILLE, MARYLAND.

INSULATOR FOR ELECTRIC WIRES.

SPECIFICATION forming part of Letters Patent No. 503,778, dated August 22,1893.

Application filed April 14. 1893- Serial No. 470,288- (No model.)

To all whom, it may concern:

Be it known that I, WILLIAM D. TRIMBLE, a citizen of the United States, residing at Ilanesville, in the county of Kentand State of Maryland,have invented certain new and usefulImprovements in Insulators for Electric fires, of which the following is a specification.

My invention relates to an improvement in insulators for electric circuit wires.

It has for its object to provide a simple and convenient insulating device for stringing up or supporting the wires.

In the accompanying drawings, Figure 1, Is a perspective View of the preferred form of supporting device and showing the Insulators. Fig. 2, is a detail View of an Insulator. Fig. 3 is a view showing a series of Insula tors secured to a rod. Fig. 4:, is a view showing a modified form of insulator and socket therefor.

Referring to the drawings theletters, A, indicate supporting arms; B, sockets orholders secured to the extremities of the supporting arms; C, insulators fitting within the said sockets, B. Each socket or holder, in the preferred form, comprises a partly cylindricshaped box having a longitudinal slot, b, and a notch or slot,b',transverse to the longitudinal slot.

The insulators may of course be made of any suitable insulating material.

Each insulator is externally cylindric and has a longitudinal bore, 0, to receive the electric wire, and a boss, 0, upon its cylIndric surface for retaining it within the socket, B.

The insulator comprises two blocks, each of half-cylindric form in order that they may inclose the electric wire without the necessity of threading the said wire through the longitudinal bore, 0, as would otherwise be necessary. The line of division between the two blocks or memberspreferably extends through the boss, 0', and divides it into two parts.

To insert the insulator within its socket the two members which comprise the insulator, are brought together with their fiat surfaces in contact. The insulator is then slid endwise into the socket, until the boss, 0, is opposite the transverse slot, 1), when it is given a lat-' eral turn so that it will enter the said transverse slot;

can only be removed by reversing the process by which it was entered. Both of said blocks are prevented from slipping out of the socket by the boss, 0', one part of which is on each of the blocks. A flange, 0 may, be secured upon one end of the insulator, part on each block, in which case, when the said insu lator is inserted. in the socket, it is pushed down till the flange strikes against the socket, when the boss will be opposite the transverse slot in the socket and may be entered therein by simply turning the insulator.

In the modified form shown in Fig. 4, the insulator is conical instead of cylindrical in which case of course the socket must be made correspondingly conical, and it is preferable in this case to make the slot, b,inclined with respect to the longitudinal slot instead of transverse to it as in the other case, so that when the conical insulator is inserted in the conical s0cket,the boss being forced up the inclined slot, will draw the insulator closely within the socket.

In the device as shown in Fig. 1, two arms, A, formed integral, bear two sockets, B, at their extremities and midway between said sockets there is a screw, D, rigidly secured to and projecting from the arms. When it is desired to secure the device to a wall, the arms, A, are used as lever-handles with which to turn the screw to drive it into the wood, thus fastening the device, sockets and all, in position. While but two sockets are shown attached to the arms, yet it will be easily seen that the number is not limited to the particular number shown.

In Fig. 3, of the drawings, a series of sockets are shown attached to a rod, E. They may be fastened thereon in. any desired man- Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In an insulator-supporting device for electric wires, the combination of the socket, interiorly circular in cross-section, having a longitudinal slot, and a slot transverse to said longitudinal slot and extending part-1y around the socket 5 and an insulator exteriorly round in cross-section fitting within the socket and adapted to turn therein and having a boss fitting within thetransverse slot of the socket.

2. As an article of manufacture an insulating supporting device for electric wires, comprising integral arms; sockets upon the arms; insulators fitting within the sockets; and a screw rigidly secured to and projecting from the said arms, whereby the said arms can be used as lever-handles for driving the screw to secure the device in position.

3. In an insulating supporting device for electric wires, the combination of a conical

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