US1105664A - Insulated cleat. - Google Patents

Description

B. G. JANSSON.

INSULATED CLEAT. APPLICATION FILED JULY29,1912.

1,105,664, v Patnted Aug. 4, 1914.

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lnalinvETT e. :A NssoN, er" MALDEN, MAssAcHusETTs, AssIeNoR To BLAKE SIGNAL AND MANUFACTURING co., or BosToN, MASSACHUSETTS, A CORPORATION or MASSACHUSETTS.

Specification of Letters Patent.

T NSULATED cLnAn Patented Aug. 4, 1914.

Amncaaqn and :any ge, 1912. serial No. 712,104.

sex and State of Massachusetts, have invented certain Improvements in Insulated Cleats, of which the following is a specification..

The present invention relates to cleats for holding wires in position on the walls of buildings and to means for making them. t

My improved cleat is made from any sultable material which is not a good conductor of electricity, but I prefer to make it from short pieces or blanks of hard straightgrained wood such as maple of any pre-v ferred cross-section, which have a hole bored in the direction of their ber into which is driven a closely fitting nail, after which the blank is placed between dies leaving one end rounded or convexed while the opposite end is concaved with a central teat inclosing the completed cleat b2.

nail. All of which I will now proceed to de# scribe and point out specifically in the ap# pended claim.

In the drawings, which form a part of and illustrate the specication,-Figure 1 is an` elevati0n`0f a roundpiece of insulating `material such as wood, and a2 a2 are short pieces or blanks cut from one end thereof. Fig. 2 is an end-view of a blank with a hole a3 bored therein. Fig. 3 is a section of a blank b with a nail atdriven through the hole a3, and Fig. 4 is a perspective view of the same. Fig. 5 is an elevation of a die c, and Fig. 6 is a sectional view of a die ci with a blank b inserted into the sunken hollow (Z2. Fig. 7 is a sectional view of the die:

c and of the die d as they are forced into each other with the blank b between them, Fig. 8 is a perspective view of the completed cleat b2. Fig. 9 is a sectional view of the Fig. 10 is a plan view of the cleat b2 holding the wires w 'ze in position.

In the drawings a is-a piece of round rod of wood and a2 a2 are blanks sawed from the rod to form the cleats, in each 'of which a hole a3 is bored to receive the nail a* which vfits tightly therein.

sunk n its upper side with a diameter of the s1ze of the. blanks a2 and its bottom is made conve'; to form the upper surface of the cleat, and its depth is somewhat more than the thickness of the blank. These dies are placed in a power press in a manner well understood so that the lower one d is fixed and the upper one c movable; and when a: blank a? is to be formedit is placed in the lower die d as shown in Fig. 6, and the u per die forced downward so that the na1l` at enters the hole c2 thereof, and the end of the die enters the hole d2 of the die d as shown in Fig. 7 and the lower end of the blank is forced to conform to the curved bottom of the die CZ while its upper end is squeezed to conform to the end of the die c and make the concave depression e2 and form the teatlike portion e3 around the nail a4; at the same time the head a5 of the nail is embedded in they concave surface of the cleat. Thus by one operation the blank is shaped by pressure into the cleat, the material thereof being forced into the form shown in the Figs. 8 and 9; and when the cleat is driven into a base to hold insulated wires w w in place the central teat es insulates the nail a* from them, and the edges e* hold thesame to the base. The wires lw are of course usually covered with insulating material as indicated in Fig. 10, which insulating material is soft enough to permit the edge e* to sink somewhat thereinto. As best shown in Fig. 9, the teat e3, while projecting far enough to act as a spacer to hold the two wires w separated, is not long enough to .reach the surface of thesupport into which the nail is driven before the wires are clamped or gripped by the edge e4. In other words the teat e3 is not in excess of the radial distance from it to the biting or gripping edge e4 and, therefore, said teat cannot oppose the driving of the nail into the supporting surface before the edge et reaches a position to perform its function. Since the said edge c4 is continuous. the device'can be used without any preliminary arrangement about its axis. In other words it can be driven regardless of how the cleat may be turned. y

I claim as my invention A. device of the character described, comprising a nail having an insulating cleat compressed tightly thereon, the head of the y A `nail beingembedded in one face of the cleat, -the other face of the cleat being concaved and havi a circular continuous marginal edge to grlp wires, the concaved face of the cleat having a central teat surrounding the shank of the nail, sald teat having alength not exceeding the radial distance from it to the gripping edge, whereby two wiresmay A be gripped against a supporting surface and held separated by the teat without having` said teat oppose the driving ofthe nail into the supporti 'surface before the said edge yhas gripped t e wires.

July, 1912;

BENNETT G. JANssoN.

Witnesses:

G. W. Pmnclz,` E. A. HILL.

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