Wireless Telegraphy and Telephony
Forfatter: Alfred P. Morgan
År: 1917
Forlag: The Norman W. Henley Publishing Company
Sted: New York
Udgave: Third Edition, Fully Illustrated
Sider: 33
UDK: 621.396.1 Mor
A practical Treatise on Wireless Telegraphy and Telephony, giving Complete and Detailed Explanations of the Theory and Practice of Modern Radio Apparatus and its Present Day Applications, together with a chapter on the possibilities of its Future Development
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34 WIRELESS TELEGRAPHY
The voltage of the currents in the secondary is high
enough to leap across an air gap in a torrent of sparks.
The spark of an induction coil intended for wireless work
Fig. 37.—Interrupter for induction coil.
should be thick and heavy. It should be sufficiently hot
and flaming to ignite a piece of paper. A rapid vibrator
giving a high pitched spark is better than a slow one not
only because it causes a more intense and powerful spark
but because the human ear is the most sensitive to high
pitched sounds and such a spark is more easily read at the
receiving station.
Fig. 38.—Electrolytic interrupter.
When the coil is a very large one and operated on the
no volt current an electrolytic interrupter is substituted