METALLIC LACING 



59 



these figures, the strength of the joint has but little to do 

 with the horsepower that can be transmitted. 



The objections to the laced joint are that it is seldom well 

 made, and that it is difficult to lace a belt so as to maintain 

 the same tension in it on the two edges of the belt. It also 

 virtually increases the diameter of the pulley at the point 

 at which the joint is in contact with it, since the lacing 

 cannot be made flush with the surface of the belt. The lac- 

 ing causes the belt on either side of the joint to be raised 



FIG. 15. METALLIC BELT LACING. 



from the pulley, and destroys the intimate contact of belt 

 and pulley. The joint also is less flexible than the remainder 

 of the belt and this has a more or less detrimental effect on 

 the belt and the service rendered by it. Belts as a rule fail 

 at or near the lacing. Added to the other objections, the 

 making of a laced joint is slow and expensive. 



Metallic Belt Lacing. A typical form of metallic belt 

 lacing is the Bristol lacing shown in Fig. 15. This is of steel, 

 and its construction is so clearly shown in the illustration that 



