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- · New York, T. Audel · leaf 220
nth to one-eighth inch in the circuit during the time of changing from one contact to the next. Theair gaps form a preventive resistance. A quick moving mechanism is used to accel-erate the movement from one contact to the next, a very quick movement being neces-sary to avoid undue arcing. The… … as• a P«as_ ■■ - - <~ 3 ji , -•= E B - ct- -= -35rH - r— S-= = - — Tr^CSiO — = ~ - : r =_ = ~Ji5-^ - — :~_;7- - i--^.;r.; P 5 5 s e r- - •- a ~ w-= £ 3 > . t: ^* !?? 9**SS ^ t- -i _, o4 r* b-a «,«■§ Sb^S.s5s3 E - •5 B o cIS 9 a 3 E.S >> « ; s £ ! = •= 5 >. fc a ■* «-= a JS - — — = 5…
Electrical engineering
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