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" Bell of improving the operation of his harmonic telegraph by causing the transmitting interrupters each to make and break the primary circuit of an induction coil, the secondary circuit of which could be placed in the main line by the depression of a... "
Electricity and Its Uses - Pagina 68
de John Munro - 1883 - 180 pagini
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Laboratory Physics: A Students Manual for Colleges and Scientific Schools

Dayton Clarence Miller - 1903 - 403 pagini
...which produces a flashing line signal of the pendulum beats in the following manner. The clock breaks the primary circuit of an induction coil, the secondary circuit of which is connected to a Pliicker tube (Fig. 37). As the amount of current required in the primary of the coil would be likely...
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Wireless Telegraphy and Wireless Telephony: An Elementary Treatise

Arthur Edwin Kennelly - 1909 - 279 pagini
...amplitudes of the emitted radiant waves. Another plan has been to place the high-frequency alternator in the primary circuit of an induction coil, the secondary circuit of which is connected with the antenna in the manner indicated in Fig. 36, care being taken to bring both the local oscillation...
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Propagation of Electric Currents in Telephone & Telegraph Conductors

Sir John Ambrose Fleming - 1911 - 316 pagini
...At one end of this conductor is placed a telephone transmitter, which comprises, generally speaking, an induction coil, the secondary circuit of which is connected to the pair of line wires or to the line wire and the earth. In the primary circuit of the coil is included...
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