And Here Is the Result in New Mechanical Kinks 



Above : Testing the 

 strength of screwdrivers. 

 The point is placed in a 

 socket and turned with 

 a wrench while the dial 

 on the scale registers 

 exactly the stress exerted 



At right above: A 

 spring lock-nut con- 

 sists of a punching of 

 spring steel bent 

 double and tempered. 

 The punching is so 

 shaped that when fin- 

 ished the outline is 

 that of a standard nut 



Below: A barrel chair. 

 The seat and back are 

 made of two-inch slats. 

 The arm rests are wide 



Above: A safety planer 

 guard. A shutter sur- 

 rounds the knife between 

 cuts and an aluminum 

 guard covers the unused 

 part of the knife v.'hen the 

 stock is being fed to it 



At left: A con- 

 venient check-sorter 

 with a capacity of 

 fourteen hundred 

 checks. When the 

 checks are in place the 

 front place is auto- 

 matically locked s o 

 that there is no danger 

 of losing the contents 



Below: An automatic 

 cut-out transformer 

 for use with small 

 currents, as for toys 



279 



