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Hasil cari dari kata atau frase: Wireless telegraphy (0.00872 detik)
Found 2 items, similar to Wireless telegraphy.
English → English
Definition: wireless telegraphy
n 1: telegraphy that uses transmission by radio rather than by
wire [syn: radiotelegraph
2: the use of radio to send telegraphic messages (usually by
Morse code) [syn: radiotelegraph
, wireless telegraph
English → English
Definition: Wireless telegraphy
Having no wire; specif. (Elec.), designating, or pertaining
to, a method of telegraphy, telephony, or other information
transmisssion, in which the messages, data, etc., are
transmitted through space by electric waves; as, a wireless
message; a wireless network; a wireless keyboard.
[Webster 1913 Suppl. +PJC]
or Wireless telegraph
system of telegraphy employing no connecting wire or wires
between the transmitting and receiving stations.
Note: Although more or less successful researchers were made
on the subject by Joseph Henry, Hertz, Oliver Lodge,
and others, the first commercially successful system
was that of Guglielmo Marconi, patented in March, 1897.
Marconi employed electric waves of high frequency set
up by an induction coil in an oscillator, these waves
being launched into space through a lofty antenna. The
receiving apparatus consisted of another antenna in
circuit with a coherer and small battery for operating
through a relay the ordinary telegraphic receiver. This
apparatus contains the essential features of all the
systems now in use.
, an apparatus or contrivance for
, telephony without wires, usually
employing electric waves of high frequency emitted from an
oscillator or generator, as in wireless telegraphy. A
telephone transmitter causes fluctuations in these waves,
it being the fluctuations only which affect the receiver.
[Webster 1913 Suppl.]