US1335280A - Motor-belt - Google Patents

Description

R. D. EDWARDS.

MOTOR BUT.

APPLICATION-FILED MAR. 24, 1919.

1,335.281). Patented Mar. 30- 1920.

fioberf 17. fdiramls UNITED STATES PATENT oEEIcE.

7 ROBERT D. EDWARDS, OF KANSAS CITY, MISSOURI.

MOTOR-BELT.

Application filed March 24, 1919.

To all whom it may concern Be it known that I, ROBERT D. EDWARDS, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Motor-Belts; and I do declare the following to be a full, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to machine driven belts and one of the objects of the invention is to construct a motor belt of fabric, the belt being substantially V-shaped in cross section and built up of a plurality of folded sections stitched together in such a manner that the pulleyv contacting surface willbe substantially free of bumps or inequalities.

The invention especially contemplates the provision of means for constructing a motor driven fan belt having the advantages of those usually employed for driving a cool ing fan on the end of a motor vehicle engine. Ordinarily leather belts are employed for driving cooling fans for motor vehicles but these are objectionable because water causes them to contract and rot and mineral oils not only rot-them but cause them to stretch; therefore, it is difficult to maintain a belt at. the proper tension and besides, the life of a leather belt is liable to be relatively shorton account of the difiiculties just enumcrated.

In actual practice, fabric belts have been found to possess marked advantages over leather belts but heretofore, these have generally been flat and as a result, some of the advantages gained by the fabric over leather have in a measure, been nullified by the fact that leather belts can be constructed to fit V-grooved pulleys and thereby provide reater frictional surface and reduce the liability of slipping.

According to my invention, not only is the advantage of the use of fabric retained but the added advantage of constructing a V-shaped belt is also present so that I combine the inherent advantages of a leather belt with those of a belt made of fabric.

Specification of Letters Patent.

Patented Mar. 30, 1920.

Serial No. 284,772.

In the drawings,

Figure I is a fragmentary perspective view of a belt constructed in accordance with my invention.

Fig. II is a fragmentary perspective view of the meeting edges of a strip showing a bias seam.

Figl' III is a similar view showing the seam ed es pressed back upon the fabric.

Fig. I is a detail perspective view showing the edges of the strip folded 'back upon itself and indicating the staggered position of the seam.

Fig. is a fragmentary perspective view of one of the strips in its completed position preiparator'y to being sewed to another strip, an

Fig. V1 is a cross sectional view through the finished belt. I I

In constructing the belt I prefer to provide a plurality of strips of fabric as, for example, sea island cotton tire fabric or heavy canvas, the width of the strips'varying according to the position they are to occupy in the completed belt. The strips are cut in appropriate lengths with inclined or biased ends and these edges are then sewed togetherpreferably by a single line of stitching,

In Fig. II I have shown the meeting edges of such a strip 1, the line of stitching being shown at 2 and the seam edges 3 and 4.- projecting outwardly preparatory to being folded down, as shown in Fig. III. The longitudinal edges of the strips are then folded over upon the body portion thereof to provide folds 5 and 6 and secured thereto by lines of stitching 7 and 8, as seen in Fig.

IV, the longitudinal edges of the strip being slightly spaced apart so that the strip may be folded again along its longitudinal center in the form shown in Fig. V and again stitched by lines of stitching 9 and 10 to provide one 4-ply unit of the belt.

In the present instance, Ihave shown the belt as constructed of three units of progressively decreasing widths from the perimeter to the inner unit so that the edges of the belt converge to form what is known commercially as a V-shaped belt, the several units or sections being held together by suitable lines of stitching. Such abelt possesses all of the inherent advantages of a types of belts usec for the purpose specified. By joining the meeting edges of the strips to form an initial band with a bias seam, the finished unit will have the seam staggered so that the point of connection in the finished belt will not be perceptible and will be devoid of bumps or inequalities which might be occasioned if a seam was made at right angles to the longitudinal edges of the strip. This will be apparent by reference to Figs. IV and V.

Having thus described my invention,

what I claim as new therein, and desire to secure by Letters-Patent is: p

A motor belt consisting of a plurality of independently formed fabric sections of progressively decreasing widths, each section consisting of a strip having its edges folded back upon the main portion of the strip so as to leave a space between the said edges, the folded back portions being stitched to the main portion and then folded over (me upon the other and again stitched along their outer edges and stitching securing the sections together.

In testimony whereof I aflix my signature.

ROBERT D. EDWARDS.

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