US1545324A - Machinery-driving belt - Google Patents

Description

July 7, 1925.

A. HENDRY ET AL MACHINERY DRIVING BELT Filed March 9, 1925 Patented July 7, 1925.

n am STATES PATENT caries.

MACHINERY-DRIVING BELT.

Application filed March 9, 1923. Serial No. 624,020.

To all whom it may concern:

Be it known that we, ALEXANDER HEN DRY and MALCOLM ALLA-N HnNnRY, both subjects of the King of Great Britain and Ireland (whose post-office address is 252 Main Street, Bridgeton, Glasgow, Scotland), have invented new and useful Im provem'ents in Machinery-Driving Belts, of which the following is 'a specification.

This invention comprises improvements in and relating to belts for machinery driving of the type formed by parallel layers of leather or other suitable material, and commonly known as Hendrys laminated belting.

The object of our invention is to so construct such belts that they will have increased flexibility when driving or traversing over pulleys.

According to our invention in belts of the type set forth the strands forming the centre portion thereof, or a number of such strands, are formed with grooves extending longitudinally of one or both of the adjacent sides thereof.

In order that our invention will be properly understood and carried into effect we have hereunto appended an explanatory sheet of drawings whereon:

' Figure 1 is a cross section of a belt embodying our present improvements and considerably enlarged to illustrate more clearly the construction thereof.

Figure 2 is a side elevation of a part of one of the inner strands forming the improved belt.

Figure 3 designates a section of such strand. Figure 1 is a section of two of such strands as used in the construction of the belt shown in Figure 1.

Figure 5 is a section of a single strand grooved on both sides, and

Figure 6 illustrates a side elevation of part of a strand grooved at intervals.

In the belt shown in Figure 1 the inner part thereof is formed of double strands each comprising two single strands a and bunited by stitching all the double strands together with the outer'strands being sewn together as is the common practice with this type of belting.

The faces a and o of the strands a and b are provided with longitudinal grooves, which latter form longitudinal channels 0, but it will be understood that such grooves .are shown much exaggerated owing to the scale towhich Figure 1 is drawn.

The outer strands d are alsopreferably grooved to protect the stitching by which all the strands are united. As shown in Figure 1, certain of the outer strands d are provided with raised portions adapted to fit into the grooves of the preceding strands. Instead of theinner portion of the belt being formed of double strands, it may be formed of single strands grooved on the opposite sides as shown by Figure 5.

The grooves .made in the inner layers, which grooves are located centrally with respect to theopposite faces of the belt, may be of any convenient formation, but preferably of a shallow V or concave shape.

In some'cases where the strands are of an irregular gauge, the grooves may bs formed intermittently at spaced distances apart as shown at Figure 6, the grooves 7 being made where the strands are thickest. Such strands would be arranged with their grooves in staggered relationship.

Belts constructed in such manner give great flexibility.

What we claim is v I 1. A belt for machinery driving com prising a plurality of, contiguous strips of material secured together, an unexposed surface ofa number of the central strips having a groove therein extending longitudinally of the belt, the contiguous strips having a bearing portion on each side thereof, above and below the grooves.

2. A belt for machinery driving comprising a plurality of strips of material arranged side by side and secured together, an unexposed surface of a number of the central strips being provided with a groove extending longitudinally of the belt, there being a bearing portion on opposite sides of the groove.

3. A belt for machinery driving comprising a plurality of strips of material arranged side by side and secured together, a number of the strips forming the centre of the belt comprising two strands secured together, the unexposed surface of said strips being grooved longitudinally of the belt so as to provide bearing portions on opposite sides of the groove.

4. A belt for machinery driving comprising a plurality of strips of material arranged side by side and secured together,

the exposed side of the outer strips, an unexposed side of a number of the strips in proximity thereto and an unexposed sidev of a number of the strips forming the centre of the belt all grooved longitudinally of the belt, said centre strips having a bearing portion above and below the grooves.

5. A belt for machinery driving comprising a plurality of stripspof material arranged side by side and secured together,

an unexposed surface of a number of the,

, terial secured together, the unexposed surfaces of a number of the strips forming the centre of the belt having a series of spaced and substantially aligned grooves therein said extending longitudinally of the belt, the grooves of the respective series being arranged in staggered relationship, the strips forming the outer edge of said belt being provided With raised portions adapted to seat inthe grooved surface of adjacent strips, the central contiguous strips having a bearing portion on each side thereof, above and below the grooves. V

7 L A belt-for machinery driving comprising a pluralityof strips of material positioned side by side and secured together, an unexposed suriace of a number of the central strips being provided with a groove extending longitudinally of the belt, the contiguous strips having bearing portions above and below the grooves, t-he contiguous bearing portions being in frictional contact. I

' ALEXANDER HENDRY. MALCOLM A. HENDRY. lVitnesses:

JOHN SIME, CnoIL G. GALL.

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