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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WIRELESS TELEGRAPHY
5
current in one direction, and then another discharge some-
what smaller than the first in the opposite direction. There
Fig. 4.— A Leyden jar discharging through a coil of wire produces
a brilliant spark and high frequency oscillations are created.
is a series of these discharges in reverse directions, but
each discharge is less and less, until the whole amount of
Fig. 5.—Curved line representing an oscillatory discharge of a
Leyden jar.
energy is expended. The complete series of discharges
takes place in an almost immeasurable fraction of time.
It is from this phenomenon that the electrical term “high
frequency oscillations,” so often heard of in “wireless” par-
lance, is derived.