US511611A - Charles n - Google Patents

Description

(No Model.)

0. N. HAMMOND.

INSULATOR.

- No. 511,611. Patented Deb. 26,1893.

WAININGYQN. u. c.

UNITED STATES PATENT OFFICE.

CHARLES N. HAMMOND, OF BOSTON, MASSACHUSETTS, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO THE HAMMOND CLEAT AND INSULATOR COMPANY, OF SAME PLACE.

INSULATOR.

SPECIFICATION forming part of Letters Patent No. 511,611, dated December 26, 1893.

Application filed September 1, 1892. Serial No. 444,716. (No model.)

To (Z4 20700110 in may concern:

to it known that I, CHARLES N. HAMMOND, acitizen of the United States, residing at Boston,in the county of Suffolk and State of Massachusetts, have invented certain newand useful Improvements in Insulators, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention has for its object to provide an insulator for electric wires which shall be effective in operation and which may be easily and cheaply constructed, and it consists in an insulator constructed as hereinafter set forth and the novel features of which are pointed 5 out in the claims which are appended hereto.

I have shown insulators embodying my invention in the accompanying drawings to which reference will be made in the following description and in which Figure l is a perspective view showing an insulator embodying my invention and adapted to hold three wires. Sections of two wires are shown in position. Figs. 2 and 3 are similar views showing insulators adapted to hold two wires and one wire respectively.

Insulators embodying my invention are made from non-conducting material, preferably porcelain, which is capable of being molded, although other non-conducting material or composition maybe employed. The

exterior shape of the insulator is unimportaut and it may be of any convenient form. The form will depend somewhat upon the number of wires which the insulator is de- 3 5 signed to hold. A recess or passage a to receive a wire is formed through the body of the insulator and in case it is desired that the wire shall play through the insulator, that is, be capable of lengthwise or endwise movement, the recess or passage a will be of such a size and shape as to facilitate the play of the wire. To this end the recess or passage a will ordinarily be straight. In case it is de sired to prevent the wire from playing through 5 the insulator, the recess or passage 0; may be curved or irregular in shape so as to bend or bind the wire thus preventing endwise or lengthwise movement thereof. To permit of the ready insertion or withdrawal of the wire into or from the recess or passage a an opening is made from said recess or passage to the top or outside of the insulator and one or more over-hanging lips or projections Z) are formed which extend over the recess or passage a and which serve to retain the wire in place in the passage afterithas beeninserted therein and prevent its accidental displacement. To facilitate the insertion of the wire into the passage a the wall on one side thereof is partially cut away as shown to form-a comparatively low retaining point as shown at (Z. This rounding off or cutting away of the material at one side of the recess or passage and at one side of the opening thereto greatly facilitates the insertion and withdrawal of the wire thus saving the time of the workmen employed in putting up the wires while not interfering with the effectiveness of the device.

For the purpose of allowing an insulator having over-hanging projections orlips to be molded to shape the insulator must be so formed as to accommodate the portions of the mold upon which the over-hanging projections rest while they are being molded or formed, otherwise the article would require to be formed by cutting or similar means and could not be produced at a cost low enough to render its use practicable. To this end I form the body of the insulator as shown at f underneath the overhanging projections Z), the cutaway portions or notchesf corresponding in shape to the shape of the projection or overhang and being formed by projections on the mold when the insulator is molded. These projections on the mold which form the notchesf serve to support the over-hangingprojections I) while they are being molded to shape. An insulator thus formed may be readily and quickly made and may be produced at a low cost.

I have shown my device as employing two overhanging projections for each wire passage, but as will be obvious the number of over-hanging projections is not material.

For the purpose of securing the insulator 5 in place, holes through which screws may be inserted are shown at 71}, Figs. 1 and 2. The insulator shown in Fig. 8 may be similarlysecured in place or it may have a screw threaded project-ion secured in the back thereof or :00

any other well-known means may be em ployed for securing it to its support.

What I claim is 1. An insulator for electric wires having a recess or passage to receive the wire, a slot or opening leading into the said recess or passage for the introduction of the Wire, and one or more over-hanging lips or projections extending over said recess or passage, the body of the insulator below said over-hanging lip or projection or lips or projections being provided with a notch or recess or notches or recesses, as f, for the purposes and substantially as set forth. 1

tially asset forth.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES N. HAMMOND. Witnesses:

WM. A. MAOLEOD, HENRY CoLvER.

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