| 摘要 |
A belt and pulley power transmission for producing a more positive drive than that which can be obtained by smooth friction surfaces between belt and pulley. The pulley is roughened or provided with a coating or sleeve of flexible material and loops of beaded chains are positioned between the belt and pulley. The beads become indented in the flexible belt and embedded in the surface of the pulley to increase the tractive effort which can be transmitted over that of the customary smooth faces of pulley and belt. A guiding drum or bar guides the loops for travel in parallel planes and permits easy lateral adjustment of the belt.
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