US400005A

US400005A - Belting

Info

Publication number: US400005A
Authority: US
Publication date: 1889-03-19
Anticipated expiration: 1906-03-19

Description

(No Model.)

G. F. PAGE.

y BELTING. No. 400,005

. Patented Mar. 19, 1,889.

u. Firms, Phomimognpner. wmngm D. c.

corda-nce with my invention.

IINTTED STATES PATENT OFFICE.

GEORGE F. PAGE, OF CONCORD, NEW HAMPSHIRE.

BELTING.

SPECIFICATION forming part of Letters Patent No. 400,005, dated March 19, 1889.

Application filed December 7, 1888. Serial No. 292,868- (No model.)

To all whom, t may concern:

Be it known that I, GEORGE E. PAGE, acitizen of the United States, residing at Concord, in the county of Merrimac and State of New Hampshire, have invented certain new and useful Improvements in Machine-Belting, of which the following is a full, clear, and exact description7 reference being had to the accompanying' drawings, making part of this specification, in which Figure l is a transverse vertical section of a piece of machine-belting constructed in ac- Fig. 2 is a similar section of the same in place upon the face or rim of a pulley, illustrating the manner in which it conforms by its lateral lexure to the crowning or transverse curvature of the same when in use. Fig. 3 is a similar section of a piece of ordinaryT double-thick beltingin place upon the rim of a pulley, illustrating the manner in which the said belt runs thereon when in use. Fig/1t is a transverse vertical section through apiece of my improved belting', in which the outer layer of fabric is composed of a greater number of longitudinal strips than in the belt shown in Fig. l. Fig. 5 is a plan of a piece of myimproved belting.

This invention relates particularly to an improvement on a belt composed of an inner layer of leather or suitably-prepared rawhide combined with and united to an outer layer of fabric treated with a filling an d waterproofing substance, which beltforms the subject of and is claimed in another application for Letters Patent,which I have made simultaneously herewith.

The object of my present invention is to produce a double belt at a moderate cost, which shall possess great strength and durability and will run upon the pulleys with a minimum of stretch and crookedness while in use, and which at the same time will readily fit or conform to the crowning surface of the pulley, thereby securing' the maximum amount of tractive force; and to this end my invention consists in a belt composed of a layer or thickness of leather or suitably-prepared rawhide, forming the inner or wearing surface, which comes in contact with the pulleys, combined with an outer layer or thickness of fabric composed of a series of independent longitudinal strips separated from each other on a line or lines parallel with the edges of the belt, whereby sufficientlateral.

fleXure of the belt is secured to enable it to readily conform to the crowning' surface of the pulley over which it may run, thus making complete contact therewith from side to side, as hereinafter set forth.

In the said drawings, A represents my improved belt, which is composed of an inner layer or thickness, b, of leather or suitablyprepared rawhide, which forms the under or wearing surface which comes in contact with the pulleys. This rawhide, when used, may be treated by a chemical process for the purpose of removing its flinty character when dry, or this may be accomplished by a mechanical process, so called, which is a manipulation of the hide by machinery and a `simultaneous working into the same by said manipulation of grease, tar, or other substances in a manner well known to the trade; or said wearing side or layer may consist of hide tanned a little upon the surfaces with some suitable tanning material, and having the inner portion treated by chemical or mechanical means, as above described. For many purposes I prefer the rawhide tanned a little upon its surfaces and having the inner portion treated by mechanical means. Especially do I prefer this for belts used in driving' electric dynamos and for other fastrunning belts, where the utmost adhesive quality between the belt and pulleys is required. For some descriptionsl of slow-running machinery full-tanned 'leather answers well, as it possesses good wearing' qualities, and has at the same time a high degree of tractive force.

To the under layer or thickness, l), of leather or rawhide is secured by cement, rivets, sewing by thongs or thread, or by wire sewing, or in any other suitable manner, an outer layer or thickness, c, of fabric, which may be cotton, linen, or any other fabric suitable for the purpose; but in practice I prefer to use a cotton fabric-such as cotton yduck woven with two selvage edges-on account of its cheapness, and when said fabric is treated as hereinafter described it possesses the desirable qualities above referred to-viz., great strength and durability combined with cheapness and a minimum of liability to become IOO crooked in use. This fabric is preferably treated by a preparation which renders it water-proof and fills the interstices between its fibers, thus perfectly coating said fibers and rendering the fabric practically solid, while at the same time it preserves it not only from the effect of moisture, but of the air as well, and does not render the belt stiff or in any way detract from its tensile strength. On the other hand, it preserves the fabric and causes it to remain permanently in its original condition and retain all of the abovementioned desirable qualities. For filling this fabric linseed-oil may be used, mixed with a suitable quantity of litharge; but I do not confine myself to this preparation, as any other suitable filling and coating which will leave the fibers pliable and cause the fabric to permanently retain the desirable qualities above .referred to can be used. This layer or thickness of fabric, c, is placed upon the ou ter side of the belt, and consists of two or more parallel strips vplaced longitudinally of the belt in such a manner that the edges of the adjacent strips may come into close contact or be separated more or less from each other, as seen in Figs. l, 2, l, and 5.

By this peculiar construction I secure a belt whose wearing-surface possesses qualities most desirable for the transmission of powerviz., great adhesion or attractive force and an ability to resist abrasive action, thereby giving to the belt great wear-resisting qualities, while the strips of fabric, c, placed upon the outer side of the belt and treated as above described, give to the belt additional weight and strength, and at the same time cause it to run with a minimum of crookedness and stretch, for the reason that these strips, if properly stretched before being placed on the leather, will stretch but little after the belt is made.

l'n the ordinary construction of double belts, especially where made, as heretofore, of one layer of leather and one layer of fabric, the two layers have been of equal width, which is the ordinary construction of a double belt. Such a belt is .necessarily stiff and rigid and does not readily conform to the crowning surface of the pulley, there being consequently, by reason of this defect, a considerable loss of power resulting from loss of p roper contact between the belt and the pulley,

as fully illustrated in Fig. C5, which represents a piece of ordinary (loul'ile-thickbelting upon the rim of a pulley. ly the peculiar construction of my improved belt, in which the fabric is superimposed upon the leather in a series of two or more strips instead of a sin gle strip, the belt is enabled to readily adjust itself to the crowning surface of the pulley, as seen in Fig. 2, by reason of the separation, as atf, of the adjacent edges of the strips of fabric, the leather or rawhide coniposing the under layer, l), bending readily at the point or points along theline of these open spaces or points of separation f, and this is especially true when prepared rawhide is used instead of full-tanned leather, as the rawhide possesses greater flexibility. A belt of this description having the qualities hereinbefore mentioned-viz., great adhesion to the pulley, tensile strength, and having a minimum of stretch and crookedness in use, as well as the desired weight in what is known as double belts-*can be constructed at a very moderate cost comparedy with belts, as heretofore made, of two layers of leather or prepared rawhide.

In my said application for Letters Patent filed simultaneously herewith, I have dcscribed and claimed a belt composed of an inner layer or thickness of leather or suitablyprepared rawhide, combined with and united to an outer layer or thickness of fabric treated with a filling and waterproofing substance, and I do not, therefore, desire to claim herein any of the features claimed in said application.

That I claim as my invention, and desire to secure by Letters Patent, isW

A dri ving-belt composed of a layer or thickness of leather or suitably-prepared rawhide, consisting of a single strip forming the inner or wearing surface or portion, combined with an outer layer or thickness, consisting of two or more independent longitudinal strips of 'fabric separated from each other on a line or lines parallel with the edges of the belt, substantially as and for the purpose described.

lVitness my hand this 28th day of November, A. D. 1883.

GEO. F. PAGE.

In presence of- P. E. 'lnscnnMAci-inn, (tannin L. Rossum..

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