18 



NEW HAVEN WHEEL COMPANY. 



American Axle and Wheel Company's 

 Patent Axle and Wheel. 



NEW STYLE. 



OLD STYLE. 



The cuts above accurately represent this axle in contrast with one 

 of the ordinary style and of the same size of bed. 



The relative size and strength is clearly and fairly shown. This axle 

 hed is in all cases the same size and shape as in the common axle, but there 

 all similarity ceases. 



In the common style the arm, at the collar, where it usually breaks, 

 contains only three-fourths of the metal (76 per cent.) which is in the square 

 of the bed, and at this point it is relatively weaker because of being cut 

 down at a right angle, from wliich form, the pounding of the wheel causes 

 the metal to crystallize and break, while this axle, beginning some distance 

 back from the arm or bearing, enlarges to a neck with a diameter equal to 

 the cornerwise thickness of the bed, and this neck always and necessarily 

 contains double the metal, and consequently more than double the strength 

 of the common axle-arm, and being made without a square cut shoulder 

 it will never crystallize or break. 



