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 543
e taken from a pair of instrument at a time because oftheir locking features, controlled by circuits between the instruments,requiring the co-operation of two people, one at each instrument, toabstract a staff. Until this staff is replaced in one or the other instru-ment, no other staff can be… … Pig. 3,718.—Method of applying bond wires to two butting rail ends. Two wires, which areusually No. 8 B. W. G. galvanized E. B. B. iron, are shunted across the fish plate, con-nection being made by means of channel pins. Where rails are joined they must have extra electrical connections,that is, be…
Electrical engineering
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