CONTACT PHENOMENA IN TELEPHONE SWITCHING CIRCUITS 49 



+100 



0.05 0,1 0,15 0,2 0.25 



MILLISECONDS 



Fig. 2 — "A" transient starting with metallic arc (voltage) 



-600 

 -400 



+ 200 

 +400 



0.3 0.4 



MILLISECONDS 



Fig. 3 — -Entire "B" transient (voltage). 



0.2 0.3 



MILLISECONDS 



Fig. 4 — Entire "B" transient (current). 



