80 



LEATHER BELTING 



face of the main pulleys and perpendicular to their axes. 

 Thus in Fig. 23, let A and B represent the main pulleys, 

 and xx and yy the planes passed through the middle points 

 of their respective faces. These intersect in the line CD. 



FIG. 24. GUIDE PULLEYS FOR SHAFTS AT OR NEAR RIGHT ANGLES. 



C C, loose pulleys. The belt will run in either direction. 



Tangents from any two points as E and F on this line to the 

 points H and /, and G and K respectively on the pulleys A 

 and B will determine proper paths for the belt. The guide 

 pulleys should be located at the intersection of the tangents 

 HE and EJ and FG and FK respectively and the plane 



