86() THE BELL SYSTEM TErHNICAL JOURNAL, JULY 195-1: 



Fig. 4 — 24 double head wire straightening machine. 



to the heads to assure rotation. To conform to the double head design 

 two spindles, joined by a loose coupling, are used. This is illustrated in 

 Fig. 6 which also pictures two sets of die blades removed from the 

 spindle slot. The space between each pair of contoured die blades as 

 positioned for the photograph shows clearly the path of the ^vire duiing 

 its transit of the rotating heads. 



The die blades maintain the same spacing, offset and length that con- 

 stituted the desired wire path through the five individually adjusted 

 sets of die blocks of the early straightening machines. The continuity of 

 a die blade is accomplished simply by bridging what had been air spaces 

 between the individual die elements and removing enough metal to 

 prevent wire contact in the bi'idging sections. 



