Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 134
Figs. 4,012 and 4,014.—Sumter testing device for testing low tension circuits. To test magneto,snap the clips on terminals after disconnecting it from circuit. The condition of magnetois evidenced by the brilliancy of lamp. To test a make and break ignitor, snap one clipon insulated terminal and…
Electrical engineering
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