CONTACT WELDING IN WIRE SPHIXG RELAYS 



911 



Fig. 13 — Experimental percussive welder for welding contacts to a molded 

 comb on a "one at a time" basis. 



3. The fast welding time recommends its use in high speed automatic 

 welding machines. 



EXPERIMENTAL WORK 



The earliest experimental work was performed on a simple welding 

 fixture with a spring loaded sliding jaw for retaining a contact sized 

 piece of metal and a clamp for holding the wire. Some welds were pro- 

 duced but they varied widely in strength. The next fixture built, Fig. 13, 

 was designed to weld contacts to a molded comb on a one at a time basis. 

 A lightweight spring jawed slider held the contact and guided its travel 

 along a fixed path. This slider was propelled by a lever actuated by a 

 spring and controlled by a cam. The cam was powered by a variable speed 

 drive. An extended study failed to show good weld results except at high 

 speeds when the lever was unable to follow the cam surface and moved 



