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BELL SYSTEM TECHNICAL JOURNAL 



put for double the speed of the old machine is four times as great or 

 about 500 feet per minute for a 3-in. twist. Additional features are 



Fig. 11 — Combined twisting and quadding machine 



special tension devices to insure uniform tension on the wire and sup- 

 ports to assist in loading spools of wire into the yoke. 



The twister for pairing and quadding heavy gauge wire in one opera- 

 tion is shown in Fig. 11. 



