THE BELL SYSTEM TECHNICAL JOT'RXAL, JCLY 1954 



Fig. 13 — Wire guide section of automatic die. 



sioned sliding blocks Avith spring loaded felt cleaning pads hold the wires 

 taut during the operations that follow. 



ANCHORING 



Because phenolic resin does not wet and, therefore, does not bond 

 with most metals, mechanical means must be used to prevent the wires 

 from turning in the resin block of the finished combs. This precaution 

 is necessary because wire wrapping tools are employed in wiring relays 

 into ecjuipment. The wrapping tool puts a torciue on the wire which maj^ 

 if the wire is not securely anchored, turn it in the resin block. Any 

 movement, obviously, will mislocate the contact welded onto the wire 

 and cause maladjustment of the relay. To mechanically prevent turn- 

 ing, a section of each half of the die is provided with accurately spaced 

 mating blade inserts, Fig. 14, which press flat lands or "anchors" on the 

 wire each time the die is closed. When the Anres are indexed subsequently 

 these anchors are located on that portion of the wire embedded in the 

 resin. 



