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BELL SYSTEM TECHNICAL JOURNAL 



mean duration of releasing lockouts is about one-quarter that of lasting 

 lockouts or 



Dr = 0.29 (/;„ + hj). (6) 



0.5 



T_ 

 T 



Fig. 9 — Calculated probability of lockout as a function of the ratio of the delay 

 between the suppressors to the total circuit delay. 



With the above relations between probability of lockout and circuit 

 constants, number of lockouts and probability of lockout, and mean 

 duration of lockouts and relay hangovers, it is possible to determine the 



