Definition of telegraphy or telegraph. Meaning of telegraphy or telegraph. Synonyms of telegraphy or telegraph

Here you will find one or more explanations in English for the word telegraphy or telegraph. Also in the bottom left of the page several parts of wikipedia pages related to the word telegraphy or telegraph and, of course, telegraphy or telegraph synonyms and on the right images related to the word telegraphy or telegraph.

Definition of telegraphy or telegraph

telegraphy or telegraph
Wireless Wire"less, a. Having no wire; specif. (Elec.), designating, or pertaining to, a method of telegraphy, telephony, etc., in which the messages, etc., are transmitted through space by electric waves; as, a wireless message. Wireless telegraphy or 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.

Meaning of telegraphy or telegraph from wikipedia

- of electrical engineering. Text telegraphy consisted of two or more geographically separated stations, called telegraph offices. The offices were connected...
- long distances, i.e., for telegraphy. The word telegraph alone generally refers to an electrical telegraph. Wireless telegraphy is transmission of messages...
- about 1910, the term wireless telegraphy was also used for other experimental technologies for transmitting telegraph signals without wires. In radiotelegraphy...
- code in a telegraphy system. Keys are used in all forms of electrical telegraph systems, including landline (also called wire) telegraphy and radio (also...
- telegraphs" or "Napoleonic semap****". Optical telegraphy dates from ancient times, in the form of hydraulic telegraphs, torches (as used by ancient cultures since...
- century. Telegraph service permitted short texts to be sent cheaply and arrive in a matter of minutes to hours, instead of days or w****s. Telegraphy facilitated...
- Acoustic telegraphy (also known as harmonic telegraphy) was a name for various methods of multiplexing (transmitting more than one) telegraph messages...
- carried telegraphy traffic, establishing the first instant telecommunications links between continents, such as the first transatlantic telegraph cable...
- term telegraphy, although best known in relation to the electric telegraph, relates to the sending of messages over long-distances. Wireless telegraphy is...
- first transcontinental telegraph line in 1861. 1826-27: Harrison Gray Dyar successfully experiments with electrical telegraphy but abandons the pursuit...