46 LEATHER BELTING 



graduations on the drums. The two sets of clamps are 

 connected by means of a pair of spring balances which are 

 attached to a pair of screws, as shown in the illustration, 

 Fig. 10. 



By means of a spindle and miter gears acting on the 

 nuts at the end of the screws, the two screws on the balance 

 can be drawn up uniformly by rotating the handle at the end 



FIG. 9. CARRIAGE OF BELT BENCH. 

 Clamping Arm in Position to Apply Tension to a Short Belt. 



of the spindle. As the clamps are drawn together by means 

 of the screws, the tension in the belt 'is registered on the 

 scales of the spring balance. The belt is drawn up until 

 the tension registered is the maximum initial tension under 

 which the belt should be kept in service, as indicated by the 

 slide rule or the tables on page 91. The ends of the belt 

 are then cut off square and it is removed from the belt bench, 

 laced and put on the pulleys. The same procedure is fol- 

 lowed in determining the tension in a belt which has been 



