Telegraph System

Some articles on telegraph system, systems, system, telegraph:

Polarential Telegraph System
... A polarential telegraph system is a direct-current telegraph system employing polar transmission in one direction and a form of differential duplex transmission in the other ... Two types of polarential systems, known as types A and B, are in use ... In half-duplex operation of a type A polarential system, the direct-current balance is independent of line resistance ...
William Fothergill Cooke - Cooke's Contribution To The Telegraph
... working on his "alarum" early-on, on 17 March 1836, just after seeing Shilling's telegraph principles in action during the demonstration at Heidelberg given by Professor Georg ... in multiples by Frederick Kerby for Cooke designated for installation on the Cooke and Wheatstone systems of telegraphy beginning with direct reference to the Great Western Railway installations, and ... submitted by Cooke himself in December 1837 and October 1838, for telegraph patents Cooke obtained himself solely in his name and separate of Wheatstone - would later be confirmed by Kerby ...
Timeline Of Electromagnetic Theory - Modern History
... LeSage built a static electricity telegraph in 1774, based upon the same principles discovered by Gray ... edition of Scots Magazine, an electrostatic telegraph system with 26 insulated wires, each corresponding to a letter of the alphabet and each. 1774 Georges-Louis LeSage builds an electrostatic telegraph system with 26 insulated wires conducting Leyden-jar charges to pith-ball electroscopes ...

Famous quotes containing the word system:

    Exploitation and oppression is not a matter of race. It is the system, the apparatus of world-wide brigandage called imperialism, which made the Powers behave the way they did. I have no illusions on this score, nor do I believe that any Asian nation or African nation, in the same state of dominance, and with the same system of colonial profit-amassing and plunder, would have behaved otherwise.
    Han Suyin (b. 1917)