US508687A - Cleat for electric wiring - Google Patents

Description

(No Model.)

P. A. DUGGAN. GLEAT FORv ELECTRIC WIRING. No. 508,687. Patented Nov. 14, 1893.

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FREDERIG A. DUGGAN, OF TRENTON, NEW JERSEY.-

CLEAT Fon ELECTRIC wmme.

SPECIFICATION forming part of Letters Patent No. 508,687, dated November 14, 1893.

Application filed June 28 1893.

Serial No. 479,025. (No model.)

To all whom it may concern.-

Be it known that I, FREDERIC A. DUGGAN, a citizen of the United States, and a resident of Trenton, Mercer county, New Jersey, have invented Improved Cleats for Electric Wiring, of which the following is a specification,

The object of my invention is to so construct a cleat for electric wiring purposes as to avoid delay and expense due to breakage of parts in wiring and to hold the wires more firmly than cleats of ordinary construction. I have reference more particularly to that class of electric wiring cleats which are constructed of porcelain or other such insulating material.

In the accompanying drawings, Figure 1 is a View of the common form of cleat. Fig. 2 is a view of three-wire form 'ot'my improved cleat with the wires in place; and Fig. 3 is a perspective view of the two parts detached, of a two-wire cleat constructed in accordance with my invention.

As shown in Fig.1 the common form of porcelain cleat is made of two parts A and A,

the latter a simple flat strip to be placed next the wall, ceiling or other foundation W to which the cleat is to be secured by screws as indicated by dotted lines; the other part A of the cleat is provided with a groove or grooves a for the reception and passage of the insulated wire or wires. When either part of the cleat is broken, the broken part can be replaced only by a duplicate of its own shape, and the other part has to be laid aside. This is a frequent cause of delay, and expense as the parts are supplied in pairs. To lessen this difficultyI construct my cleat of two parts 13,13, interchangeablyalike, as shown in Figs. 2 and 3 each part having aV-shaped notch or notches b of suitable depth on its inner face, such that when the two parts are placed together these notches in the two parts will coincide and together form an opening or openings for the reception of'the wire or wires to be held. The V-shape of the notches adapts the cleats to securely hold different sizes of wires within certain limits. To hold the wires more firmly I form corrugations or projections on the faces of these V-shaped grooves, as indicated in Fig. 3, so that the projections or corrugations will embed themselves more or less in the insulation of the wire. I prefer also to form annular ribs r on the outer faces of the two parts of the cleat, around the countersunk openings R for the reception of the securing screws S. These securing screws are indicated by dotted lines in Fig. 2.

In the drawings I have shown my cleats as constructed for two or three wires, but it will be readily understood that they may be com structed with notches for one or more wires.

From the foregoing description it will be seen that my improved cleat is not only very strong-and adapted to hold the wires securely, but because of the fact that the two parts of the cleatare interchangeably alike, delays and expense from breakage in wiring will be lessened, as will be readily understood.

I claim as my invention-' An improved cleat for wiring purposes having its two parts interchangeably alike with corrugated notches on their inner faces, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FREDERIO A. DUGGAN.

Witnesses:

B. B. DINSMORE, WM. H. BAKER.

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