Radio, miracle of the 20th century ... a story of human achievement that stands unrivalled in the history of humanity, together with a colorful portrayal, giving a broad, general view of the whole subject of wireless telegraph and telephone and its marvelous development (1922)
Drinker, Frederick E. [from old catalog], Lewis, James G., [from old catalog] joint author · [Philadelphia, Printed by National publishing co.] · leaf 261
vibrator contacts areadjustable by means of the set screw. The condenseracross the vibrator contacts produces a higher voltage inthe secondary than would be produced if it were not there.It also tends to prevent an arc forming at the vibratorwhen the circuit is broken there. When an induction coil… … sudden stopping of the current in the primary producesa surge of high voltage in the secondary, thus chargingthe condenser. Figure 8 shows the relations of currentand voltage in the primary and secondary. To read such diagrams it must be remembered thattwo things are always shown on such a diagram,…
Radio
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