Noun
a coil for producing a high voltage from a low-voltage source
Source: WordNetIn the 1930s, telephone sets were developed that combined the bell and induction coil with the desk set, obviating a separate ringer box. Source: Internet
These electrons interact with the radio-frequency magnetic field of the induction coil and are accelerated first in one direction, then the other, as the field changes at high frequency (usually 27.12 million cycles per second). Source: Internet
The two major designs are the Fassel and Greenfield torches. citation The end of this torch is placed inside an induction coil supplied with a radio-frequency electric current. Source: Internet
They may implement a shunt across the transmitter circuit and induction coil to maximize the pulsing signal of the dial by eliminating all internal impedances of the telephone set. Source: Internet