US274280A - Edwin m - Google Patents

Description

(No Hndel.)

' E. M. GROSS.

BELTING. V No. 274,280. Patented Mar. 20, 1883.

, I La WITNESSES RH/ENTER" m Fri-ens. hnwumwr. Wnhinglnn. n. c.

UNITED STATE s PATENT OFFICE.

- EDWIN M. cRoss,oF SYRACUSE, NEW YORK.

BELTING.

SPECIFICATION forming part of Iletters Patent No. 274,280, dated March 20, 1883.

Application filed February 1, 1883. (No model.)

To all whom it may concern Be it known that I, EDWIN M. GRoss,of

State of New York, have invented new and useful Improvements in Belting, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

It is a well-known fact to mechanical engineers and machinists that the ordinary belting at present in the market will, after a short usage, stretch, so as to lose its frictional hold on the pulleys, and requires frequent tightening. This defect has in many instances led to the employment of double belts. These, however, are more expensive, and do not afford a strength proportionate to the quantity ,ofmaterial, owing to the difference in the lengths of the inner and outer layer of material when stretched on two pulleys, and the consequent unequal strain on said layers of material.

Manufacturers of belts have attempted to take the stretch out of the belting by sub jecting it to a stretching-machine; but this treatment has only replaced theaforesaid defects by other and more serious defeets-viz.,

it frequently weakened the belting by excessi've strain of its fibers, and when suchbelting is applied to use it almost invariably twists and warps, so as to deprive it of an effective hold on the ing truly.

Attempts have been made to re-enforce single-thick belting by the use of strands of wire pulley and of its capacity of trackstretched along the surface of the belting,

' and fastened thereto at intervals; but it is obvious that such construction does not combine the wire with the belt in such a manner as to impart to the belt the desired stability.

It isto obviate the aforesaid defects by simple and comparativelyinexpensive means which my invention hasfor its object; and to that end it consists essentially in stitching a single-thick belt longitudinally with waxed or metallic thread.

In leather belts one row of stitches near each edge thereof, as shown in Figure 1 of in Fig. 2of the drawings.

In Fig. 3 is shown a longitudinal section of the belt, taken on the line of one of the rows of stitches designated by the reference-letters a a. A leather belt thus made requires no preliminary stretching, but its fibers are left intact and unimparied, and whether the belt is composed of leather, canvas, rubber, or

the described sewing as to relieve the fibers of the material of the greater portion of the strain, effectually prevent the stretching of the belt, and render one edge thereof as strong as the other, thus causing said belt to invariably track true and retain its efficiency. In fact, said sewing imparts to the single belt now in use. Furthermore, a single beltstitched near the edges in the manner shown and described stifl'ens the edges thereof, so that when said belt is applied to cone-pulleys the edges of thebelt are capable of resisting the outward or upward pull incident to their fric tional contact with the adjacent vertical face of the pulley.

When my improved belting is made of leather, any portion of the hide can be used. Experience has proved that a belt made from the flank or spongy portion of the hide is as center of the hide.

| nesses of leather and of other material have been sewed longitudinally; but such sewing was applied merelyfor the purpose of uniting the unequal distribution of the strain on the several layers or thicknesses of the belt, as before stated, the sewing of such belting cannot produce .the effect derived when applied to a single thick belt.

FREDERICK H. GIBBs.

I am aware that belts of two or more thick other equivalent material, it is so'reenforced by a strength equal to that of the double belts strong and eflective as one made from the a the several layers of material, and, owing to Having described my invention, whatl claim

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