| slovo | definícia |
telegraphy
(mass) | telegraphy
- telegrafia |
telegraphy
(encz) | telegraphy,telegrafie Jaroslav Šedivý |
Telegraphy
(gcide) | Telegraphy \Te*leg"ra*phy\, n. [Cf. F. t['e]l['e]graphie.]
The science or art of constructing, or of communicating by
means of, telegraphs; as, submarine telegraphy.
[1913 Webster] |
telegraphy
(wn) | telegraphy
n 1: communicating at a distance by electric transmission over
wire
2: apparatus used to communicate at a distance over a wire
(usually in Morse code) [syn: telegraph, telegraphy] |
telegraphy
(foldoc) | telegraphy
A historical term for communication,
either wired or wireless, using Morse code. The term is
used in contrast with telephony meaning voice transmission.
Telegraphy is sometimes (somewhat incorrectly) referred to as
"continuous wave" or CW transmission.
(2009-11-24)
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| | podobné slovo | definícia |
radiotelegraphy
(encz) | radiotelegraphy,radiotelegrafie n: Michal Ambrož |
wireless telegraphy
(encz) | wireless telegraphy, n: |
Duplex telegraphy
(gcide) | Duplex \Du"plex\, a. [L., fr. duo two + plicare to fold. See
Two, and Complex.]
1. Double; twofold.
[1913 Webster]
2. (Computers) organized so that data may be transmitted in
two opposite directions over the same channel; -- of
communications channels, such as data transfer lines
between computers.
[PJC]
Duplex escapement, a peculiar kind of watch escapement, in
which the scape-wheel has two sets of teeth. See
Escapement.
Duplex lathe, one for turning off, screwing, and surfacing,
by means of two cutting tools, on opposite sides of the
piece operated upon.
Duplex pumping engine, a steam pump in which two steam
cylinders are placed side by side, one operating the
valves of the other.
Duplex querela [L., double complaint] (Eccl. Law), a
complaint in the nature of an appeal from the ordinary to
his immediate superior, as from a bishop to an archbishop.
--Mozley & W.
Duplex telegraphy, a system of telegraphy for sending two
messages over the same wire simultaneously.
Duplex watch, one with a duplex escapement.
half duplex (Computers)
(a) arranged so that the information may be transmitted in
both directions, but only in one direction at a time;
-- of communications channels between computers;
contrasted with full duplex(a).
(b) arranged so that the information transmitted to the
remote computer also appears on the local terminal; --
of communications channels between computers;
contrasted with full duplex(b).
full duplex, (Computers)
(a) arranged so that the information may be transmitted in
both directions simultaneously; -- of communications
channels between computers; contrasted with {half
duplex(a)}.
(b) arranged so that the information transmitted to the
remote computer does not appear on the local terminal;
-- of communications channels between computers;
contrasted with half duplex(b).
[1913 Webster] |
Electro-telegraphy
(gcide) | Electro-telegraphy \E*lec`tro-te*leg"ra*phy\, n.
The art or science of constructing or using the electric
telegraph; the transmission of messages by means of the
electric telegraph.
[1913 Webster] |
Hertzian telegraphy
(gcide) | Hertzian \Hertz"i*an\, a.
Of or pert. to the German physicist Heinrich Hertz.
[Webster 1913 Suppl.]
Hertzian telegraphy, telegraphy by means of the Hertzian
waves; wireless telegraphy.
H. waves, electric waves; -- so called because Hertz was
the first to investigate them systematically. His
apparatus consisted essentially in an oscillator for
producing the waves, and a resonator for detecting them.
The waves were found to have the same velocity as light,
and to undergo reflection, refraction, and polarization.
[Webster 1913 Suppl.] |
Phototelegraphy
(gcide) | Phototelegraphy \Pho`to*te*leg"ra*phy\, n.
Telegraphy by means of light, as by the heliograph or the
photophone. Also, less properly, telephotography. --
Pho`to*tel"e*graph, n. -- Pho`to*tel`e*graph"ic, a.
[Webster 1913 Suppl.] |
Radiotelegraphy
(gcide) | Radiotelegraphy \Ra`di*o*te*leg"ra*phy\
(r[=a]`d[i^]*[o^]*t[e^]*l[e^]g"r[.a]*f[y^]), n. [Radio- +
telegraphy.]
Telegraphy using the radiant energy of radio waves; wireless
telegraphy; -- the term adopted for use by the
Radiotelegraphic Convention of 1912.
[Webster 1913 Suppl.] |
Telegraphy
(gcide) | Telegraphy \Te*leg"ra*phy\, n. [Cf. F. t['e]l['e]graphie.]
The science or art of constructing, or of communicating by
means of, telegraphs; as, submarine telegraphy.
[1913 Webster] |
Wireless telegraphy
(gcide) | Wireless \Wire"less\, a.
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]
Wireless telegraphy or Wireless telegraph (Elec.), any
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.
Wireless telephone, an apparatus or contrivance for
wireless telephony.
Wireless telephony, 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.] |
radiotelegraphy
(wn) | radiotelegraphy
n 1: telegraphy that uses transmission by radio rather than by
wire [syn: radiotelegraph, radiotelegraphy, {wireless
telegraphy}]
2: the use of radio to send telegraphic messages (usually by
Morse code) [syn: radiotelegraph, radiotelegraphy,
wireless telegraph, wireless telegraphy] |
wireless telegraphy
(wn) | wireless telegraphy
n 1: telegraphy that uses transmission by radio rather than by
wire [syn: radiotelegraph, radiotelegraphy, {wireless
telegraphy}]
2: the use of radio to send telegraphic messages (usually by
Morse code) [syn: radiotelegraph, radiotelegraphy,
wireless telegraph, wireless telegraphy] |
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