## Treatise on Leather Belting |

### From inside the book

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Page 34

As has been shown heretofore there is considerable latitude in the use of the

terms " single " and " double " as applied to belting. However, the above rules are

applied to the average single and double belt and give wide margins of safety in

the transmissive power when the velocity of the belt is not over 4000

themselves in ...

As has been shown heretofore there is considerable latitude in the use of the

terms " single " and " double " as applied to belting. However, the above rules are

applied to the average single and double belt and give wide margins of safety in

the transmissive power when the velocity of the belt is not over 4000

**feet per****minute**. As will be shown in a subsequent chapter, at a speed of about 4000**feet****per minute**the centrifugal effects due to the belt weight begin to manifestthemselves in ...

Page 39

TABLE V Surface Speed in Ft. per Min. of a Pulley One Inch in Diameter at

Various Revolutions per Minute Ride: Multiply the tabular quantity opposite the

revolutions by the diameter of a given pulley in inches to get its surface speed in

Specifications. — BELT VELOCITIES 39. Rev. per Min. Speed Ft. per Min. Rev.

Speed Ft. per Min. Rev. Speed Ft. per Min. Rev. Speed Ft. per Min. per Min. per

Min. per Min. 10 2.617 ...

TABLE V Surface Speed in Ft. per Min. of a Pulley One Inch in Diameter at

Various Revolutions per Minute Ride: Multiply the tabular quantity opposite the

revolutions by the diameter of a given pulley in inches to get its surface speed in

**feet per minute**. 4 TABLE V — (Continued) 72. Installation, Care andSpecifications. — BELT VELOCITIES 39. Rev. per Min. Speed Ft. per Min. Rev.

Speed Ft. per Min. Rev. Speed Ft. per Min. Rev. Speed Ft. per Min. per Min. per

Min. per Min. 10 2.617 ...

Page 151

61, the carrying capacity disappears at velocities ranging from 10,000 to 12,000

from the character of the leather, and where similar changes are noted in the

coefficient of friction, the belt still has a moderate carrying capacity at speeds as

high as 12,000

the effects of centrifugal force for single and double belt one inch wide at a variety

of speeds ...

61, the carrying capacity disappears at velocities ranging from 10,000 to 12,000

**feet per minute**. In other cases where greater working tensions are allowablefrom the character of the leather, and where similar changes are noted in the

coefficient of friction, the belt still has a moderate carrying capacity at speeds as

high as 12,000

**feet per min**. On pp. 218 and 219, Tables XX and XXI, are giventhe effects of centrifugal force for single and double belt one inch wide at a variety

of speeds ...

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### Common terms and phrases

ADDED FOR FOURTH Angle Nat angle of wrap arc of contact backbone bearings belt dressing belt drive belt speed belt tensions belting butt belting leather capacity cement cent center distance centrifugal force coefficient of friction crossed belt crowning DEGREE Angle determined Diam double belts driven pulley edge effective pull elasticity factor of safety feet per minute fiber flesh side formula FOURTH FIGURE Figure Fourth PROPORTIONAL grain side guide pulleys hide holes horizontal horse power idler drive inch of width increase initial tension lace laps leather belt line shaft load LOGARITHM MANTISSAS Third machine manufacture method modulus of elasticity motor open belt plane plies power transmitted pulley diameters quarter-turn drive radians ratio reverse revolutions per minute running shown Sine Deg single belt slack side slip small pulley specifications stretch strips surface TABLE tensile strength tests thickness tight side transmission waterproof weight