US2024757A - Lug strap - Google Patents

Description

w. l. BULLARD 2,024,757

LUG STRAP Filed Aug. 16, 1954 2 Sheets-Sheet l Dee; 17, 1935.

Je d' DeC. 17, 1935. W L BULLARD v 2,024,757

LUG STRAP v Filed Aug. 16, 1954 2 Sheets-Sheet 2 Patented Dec. 17, 1935 PATENT OFFICE LUG STRAP Washington Irving Bullard, Danielson, Conn., as-

signor to E. H. Jacobs Manufacturing Co.,

Danielson, Conn.

Application August 16, 1934, Serial No. 740,062

1 Claim.

My present invention is a novel and improved lug strap', preferably of the reinforced type, and comprises a novel method of making same.

In my prior Patent No. 1,775,077, issued September 2, 1930, and my prior and copending application 650,668, filed January 7, 1933, I have disclosed and claimed various methods of making reinforced lug straps of textile material and, preferably, showing a smooth tapered reinforcement.

My present invention is an improvement on the devices of these prior inventions and consists in making a double reinforcement, particularly at the heel or crown of the lug strap, both reinforcing instrumentalities including means to continue or insure a smooth tapered structure of both reinforcements and the two arms of the strap.

In carrying out the method of manufacturing my present improved lug strap, I prefer to utilize one or more of the methods of reinforcement of the main portion of the lug strap structure as shown in my said prior application 650,668, wherein a reinforcing layer, or layers, is incorporated in the interrolling of the fabric constituting the lug strap, with an angular portion positioned practically midway of the sheet of material which is to be interrolled, with suitable adhesive, to form the lug strap structure, thus giving greater thickness in tapered contour at the crown where the Wear is greatest. In addition, I also taper, suitably and proportionally, the extra leather facing which is also a reinforcing and wear-resisting member applied on the inner curved or convex part of the completed lug strap. This leather facing may be relatively short around the curved heel portion only, or may be of considerable length extending as far as the inner ends of the bolt slots.

This double reinforcing, each with a tapered structure and each reinforcement proportional and cooperating with the other, gives an advantageous cooperation in adding longer life to the double reinforced lug strap thus constructed, and greatly increases the efficiency, wear-resisting qualities and, hence, decreases the expense of my improved lug strap made by my present method.

Referring to the drawings illustrating a preferred embodiment of the invention,

Fig. 1 is a plan View illustrating the method of interrolling the reinforcement in the textile structure;

Fig. 2 is an enlarged cross-sectional View of the same after completion of the interrolling operation;

Figs. 3 and 4 show plan and side views, respectively of the forming dies;

Fig. 5 shows the tapered reinforcing leather facing for the concave surface;

Fig. 6 shows the application of the reinforce- 5 ment to the saddle before the lug strap is applied thereto;

Fig. 7 shows the completion of the U-shaped conformation lof my double reinforced lug strap;

Figs. 8 and 9 show the completed lug strap 10 structure showing different lengths of the reinforcing facing, and

Fig. 10 is an additional view showing a square heeled lug strap and reinforcement.

As shown in Fig. l, one or more layers of textile 15 material I and 2 are applied together with suitable adhesive intermediate the same, and one or more reinforcing layers 3 and 4 are similarly applied to present a smooth taper in the arm when the combined layers are interrolled. The lug 20 strap 5 is thereupon subjected to compression while still plastic, as shown in Figs. 3 and 4, by the edge dies 1, 1 and the concave dies 8, 8. Thereupon, the lug strap, as thus far completed, is subjected to the usual die-forming operations to conform the same first into a flat straight blank, and then into a U-shaped structure, as shown in Figs. 8 and 9.

With the lug strap structure as thus prepared,

I then apply the specially prepared reinforced 30 tapered facing, as shown at l0 in Fig. 6, this facing being tapered at each end at Il and I2. This tapered end structure of the member I0 is preferably formed entirely on the flesh side, as indicated at ifi-I4, leaving the skin and hair 35 surface l5 to aid and assist in taking up the wearresistant feature desirable, and adding considerably to the toughness and long life of the entire reinforced lug strap.

In order to add this tapered reinforcement I0 40 to the U-shaped lug strap, I either fit the reinforcement to the heel of the lug or onto a form or saddle 24, preferably of sufcient length to contain a plurality of the reinforcements l0. Thereupon, the outer surface is coated with suit- 45 able cement or adhesive and the lug strap 25 fitted thereover and the metal shoe 22 applied on each lug strap, springing the free arms of the shoe 22 thereover, and thus supplying a constant compression or tension to hold the lug 50 strap and reinforcement into firm compressive engagement until the adhesive has set.

As the reinforcement is plastic during the setting of the adhesive, thus giving the completed blank a final conforming action, applying and iiesh side have been transformed into the taperafxing the reinforcement l0 firmly on the blank 5, forces the tapered end sections I4 into intimate contact with the blank 5, forming, in effect, these tapered sections in the opposite or skin surface, as indicated at 20, 2D, Figs. 6, rI, 8, and 9.

Fig. 10 illustrates a modified form wherein the lug strap 40 after being interrolled and while still plastic is formed into'aVU-shaped contour with the heel portion substantially flat or square,V

and the reinforcing layer 4| is similarly conformed. For this purpose, the saddle 24 wouldV also be square in cross-section at the upper part to permit the leather reinforcement and the lug strap to be held tightly together until the adhesive uniting them is set.

In either instance, the original tapers I4 on the i ing surfaces 2l) on the opposite side of the facing l0, and the double reinforcing at the crown imparts the added strength, long life, and wearresisting features which are important features of the present invention.

I claim:

The improved process of making lug straps from interroller textile material united with adhesive, which consists in forming the'lug strap with a tapered reinforced structure from the central portion to each end, producing an extra thickness at said middle portion for the crown part of the lug strap, molding said blank while the interrolled structure and adhesive are still plastic into U-shaped form and simultaneously applying a second tapered reinforcing wear-resisting strip on the inside of the U-shaped form,

said reinforcing layer having a corresponding and cooperating taper to that of the crown portion of the strap to whichit is applied, and subjecting the U-shaped lug vstrap and the tapered reinforcement to combined pressure until the adhesive has dried, whereby the tapered reinforcing and the tapered lug strap are united, giving a .double reinforcement at the crown.

WASHINGTON IRVING BULLARD.

CERTIFICATE OF CORRECTION.

Patent No. 2,024,757. December 1v, 1955.

WASHINGTON IRVING BULLARD.

It is hereby Certified that error appears in the printed specification of the above numbered patent requiring Correction as follows: Page 2, second Column, line 3, in the claim for "interroller" read interrolled; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the oase in the Patent Office.

Signed and sealed this 28th day of January, A. D. 1936.

Leslie Frazer (Seal) Acting Commissioner of Patents.

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