Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems (1921)
Smith, Arthur Bessey, b. 1875, Campbell, Wilson Lee · New York : McGraw-Hill · leaf 282
S5First Selector trot Relay Ui,i,u F* Vert Mag. Rot.Mag. … W 10, £!P c-197 §^5\ * ^<^ S-S «:£ ° •*>.<> >:;<» IS* P 107 Fig. 224.—Primary unci first selector circuits. The pulsations furnished by the interrupter I cause the rotary relay tovibrate so that the rotary magnet N-5 rotates the wipers. During thistime the row test relay R-12 lies…
Telephone
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