Small, Sidney Aylmer, 1876- [from old catalog] · Chicago, F. J. Drake & co · leaf 102
-sistance is put in parallel with the spark gaps. Experi-ment has shown that by proper design this is very effect-ive in preventing an arc across the discharge points. (5) Fixed gap length. In some arresters thegap length is fixed, and resistance (series or shunt), also,and the kind of metal used… … Fig. 34. Lightning Arrester and Stray Current Protector for Telephone,Bell and Signalling Circuits. In other types the gap points are drawn apart by mag-netism. Question 17. What type of arrester is used for tele-phone circuits ? Answer. The protector is shown in Figs. 34 and 35.The line current…
Electricity
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