telegraphic signal การใช้

• Meanwhile, battery would not carry a telegraphic signal over long distances.
• Today's networks are extensions of that telegraphic signal, not of the tracks beneath it.
• Morse encountered the problem of getting a telegraphic signal to carry over more than a few hundred yards of wire.
• Leonard Gale, who helped Samuel Morse achieve the technological breakthrough of getting the telegraphic signal to travel long distances over wire
• The ordinary speed of telegraphic signals is thirty-five to forty words a minute; but with this machine several hundred words were possible ."
• The signal was relayed using the numeric flag code known as the " Telegraphic Signals of Marine Vocabulary ", devised in 1800 by Rear Admiral Admiral Lord Howe.
• Lord Nelson's hunt for Napoleon would have been easier had it taken place three years later, after the publication of " Telegraphic Signals or Marine Vocabulary, " by naval expert Home Popham.
• In the United States, Thomas Edison, in the mid-1880s, patented an electromagnetic induction system he called " grasshopper telegraphy ", which allowed telegraphic signals to jump the short distance between a running train and telegraph wires running parallel to the tracks.
• One precursor to the development of the electromagnetic telephone originated in 1833 when Carl Friedrich Gauss and Wilhelm Eduard Weber invented an electromagnetic device for the transmission of telegraphic signals in G鰐tingen in Lower Saxony, helping to create the fundamental basis for the technology that was later used in similar telecommunication devices.
• Not knowing the combination of the safe, and being unable to reach by telephone her employer, she suddenly conceives the idea that if by telegraphic signal she can make known to the man in the safe that she is there, trying to help him, he in his turn can in the same code give her the combination of the safe.
• This is effected by means of telegraphic signals, which are sent out from Washington at noon daily, except Sundays . The original object of this time service was to furnish mariners in the seaboard cities with the means of regulating their chronometers; but, like many another governmental activity, its scope has gradually broadened until it has become of general usefulness.
• ""'England expects that every man will do his duty "'", here represented with Popham's " Telegraphic Signals of Marine Vocabulary ", was a signal sent by Royal Navy Admiral Horatio Nelson, 1st Viscount Nelson from the HMS " Victory " as the Battle of Trafalgar was about to commence on 21 October 1805.
• In 1894 Lodge showed that the Branly coherer could be employed to transmit telegraphic signals, and in order that the filings should not remain " cohered " after the cessation of the electric oscillations, he devised an electro-mechanical " tapper " on the principle of the ordinary " buzzer, " or electric door-bell, the hammer of which was caused to tap the glass tube as long as the electric oscillations continued.