| slovo | definícia |
Electric telegraph
(gcide) | Telegraph \Tel"e*graph\, n. [Gr. ? far, far off (cf. Lith. toli)
+ -graph: cf. F. t['e]l['e]graphe. See Graphic.]
An apparatus, or a process, for communicating intelligence
rapidly between distant points, especially by means of
preconcerted visible or audible signals representing words or
ideas, or by means of words and signs, transmitted by
electrical action.
[1913 Webster]
Note: The instruments used are classed as indicator,
type-printing, symbol-printing, or chemical-printing
telegraphs, according as the intelligence is given by
the movements of a pointer or indicator, as in Cooke &
Wheatstone's (the form commonly used in England), or by
impressing, on a fillet of paper, letters from types,
as in House's and Hughe's, or dots and marks from a
sharp point moved by a magnet, as in Morse's, or
symbols produced by electro-chemical action, as in
Bain's. In the offices in the United States the
recording instrument is now little used, the receiving
operator reading by ear the combinations of long and
short intervals of sound produced by the armature of an
electro-magnet as it is put in motion by the opening
and breaking of the circuit, which motion, in
registering instruments, traces upon a ribbon of paper
the lines and dots used to represent the letters of the
alphabet. See Illustration in Appendix, and {Morse
code}.
[1913 Webster]
Note: In 1837, Samuel F. B. Morse, an American artist,
devised a working electric telegraph, based on a rough
knowledge of electrical circuits, electromagnetic
induction coils, and a scheme to encode alphabetic
letters. He and his collaborators and backers
campaigned for years before persuading the federal
government to fund a demonstration. Finally, on May 24,
1844, they sent the first official long-distance
telegraphic message in Morse code, "What hath God
wrought," through a copper wire strung between
Washington, D.C., to Baltimore, Maryland. The phrase
was taken from the Bible, Numbers 23:23. It had been
suggested to Morse by Annie Ellworth, the young
daughter of a friend. --Library of Congress, American
Memories series
(http://memory.loc.gov/ammem/today/may24.html).
[PJC]
Acoustic telegraph. See under Acoustic.
Dial telegraph, a telegraph in which letters of the
alphabet and numbers or other symbols are placed upon the
border of a circular dial plate at each station, the
apparatus being so arranged that the needle or index of
the dial at the receiving station accurately copies the
movements of that at the sending station.
Electric telegraph, or Electro-magnetic telegraph, a
telegraph in which an operator at one station causes words
or signs to be made at another by means of a current of
electricity, generated by a battery and transmitted over
an intervening wire.
Facsimile telegraph. See under Facsimile.
Indicator telegraph. See under Indicator.
Pan-telegraph, an electric telegraph by means of which a
drawing or writing, as an autographic message, may be
exactly reproduced at a distant station.
Printing telegraph, an electric telegraph which
automatically prints the message as it is received at a
distant station, in letters, not signs.
Signal telegraph, a telegraph in which preconcerted
signals, made by a machine, or otherwise, at one station,
are seen or heard and interpreted at another; a semaphore.
Submarine telegraph cable, a telegraph cable laid under
water to connect stations separated by a body of water.
Telegraph cable, a telegraphic cable consisting of several
conducting wires, inclosed by an insulating and protecting
material, so as to bring the wires into compact compass
for use on poles, or to form a strong cable impervious to
water, to be laid under ground, as in a town or city, or
under water, as in the ocean.
[1913 Webster] |
Electric telegraph
(gcide) | Electric \E*lec"tric\ ([-e]*l[e^]k"tr[i^]k), Electrical
\E*lec"tric*al\ ([-e]*l[e^]k"tr[i^]*kal), a. [L. electrum amber,
a mixed metal, Gr. 'h`lektron; akin to 'hle`ktwr the beaming
sun, cf. Skr. arc to beam, shine: cf. F. ['e]lectrique. The
name came from the production of electricity by the friction
of amber.]
1. Pertaining to electricity; consisting of, containing,
derived from, or produced by, electricity; as, electric
power or virtue; an electric jar; electric effects; an
electric spark; an electric charge; an electric current;
an electrical engineer.
[1913 Webster]
2. Capable of occasioning the phenomena of electricity; as,
an electric or electrical machine or substance; an
electric generator.
[1913 Webster]
3. Electrifying; thrilling; magnetic. "Electric Pindar."
--Mrs. Browning.
[1913 Webster]
4. powered by electricity; as, electrical appliances; an
electric toothbrush; an electric automobile.
[WordNet 1.5]
Electric atmosphere, or Electric aura. See under Aura.
Electrical battery. See Battery.
Electrical brush. See under Brush.
Electric cable. See Telegraph cable, under Telegraph.
Electric candle. See under Candle.
Electric cat (Zo["o]l.), one of three or more large species
of African catfish of the genus Malapterurus (esp. {M.
electricus} of the Nile). They have a large electrical
organ and are able to give powerful shocks; -- called also
sheathfish.
Electric clock. See under Clock, and see
Electro-chronograph.
Electric current, a current or stream of electricity
traversing a closed circuit formed of conducting
substances, or passing by means of conductors from one
body to another which is in a different electrical state.
Electric eel, or Electrical eel (Zo["o]l.), a South
American eel-like fresh-water fish of the genus Gymnotus
(G. electricus), from two to five feet in length,
capable of giving a violent electric shock. See
Gymnotus.
Electrical fish (Zo["o]l.), any fish which has an
electrical organ by means of which it can give an
electrical shock. The best known kinds are the torpedo,
the gymnotus, or electrical eel, and the {electric
cat}. See Torpedo, and Gymnotus.
Electric fluid, the supposed matter of electricity;
lightning. [archaic]
Electrical image (Elec.), a collection of electrical points
regarded as forming, by an analogy with optical phenomena,
an image of certain other electrical points, and used in
the solution of electrical problems. --Sir W. Thomson.
Electric machine, or Electrical machine, an apparatus for
generating, collecting, or exciting, electricity, as by
friction.
Electric motor. See Electro-motor, 2.
Electric osmose. (Physics) See under Osmose.
Electric pen, a hand pen for making perforated stencils for
multiplying writings. It has a puncturing needle driven at
great speed by a very small magneto-electric engine on the
penhandle.
Electric railway, a railway in which the machinery for
moving the cars is driven by an electric current.
Electric ray (Zo["o]l.), the torpedo.
Electric telegraph. See Telegraph.
[1913 Webster] |
| |