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BKLL SYSTEM TECHNICAL JOURNAL 



type of cable is protected from mechanical injury and soil corrosion, and 

 can be laid very quickly and cheaply. One interesting advantage 

 gained through the use of this type of armor is that a magnetic 

 shield is thus placed around the cable greatly reducing the efTects of 

 induction. 



£'J.rmf^^.'^::kM 



Fig. 40 — -Tape armoring machine. 



Conclusion 



The application of scientific and engineering elTort to improvements 

 in the processes and machine equipment for manufacture of telephone 

 cable is fully justified by the results which have been obtained from 

 both an economic and quality standpoint. New raw materials and 

 alloys together with new designs of cable will be forthcoming in the 

 future in the effort to improve and extend the long distance telephone 

 service. New communication devices will be invented and perfected 

 for use in connection with such cable and these in turn will have a 

 radical effect upon the cable design, the process and the equipment for 

 its manufacture. I'he engineers and scientists engaged in such 

 manufacturing activities are indeed rendering a broad service not only 

 to the men and women employed in the immediate industry but also 

 to the people at large who use these facilities. 



