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Knight's Mechanical Encyclopedia (ed. Knight) 20 0 Browse Search
Harper's Encyclopedia of United States History (ed. Benson Lossing) 6 0 Browse Search
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Harper's Encyclopedia of United States History (ed. Benson Lossing), Gray, Elisha 1835- (search)
Gray, Elisha 1835- Electrician; born in Barnesville, O., Aug. 2, 1835; in early life was a blacksmith, carpenter, and boatbuilder. Later he went to Oberlin College, where he followed special studies in physical science, supporting himself by working at his trade. In 1867 he invented a self-adjusting telegraph relay, and soon afterwards designed the telegraphic switch and annunciator for hotels, the private telegraph line printer, the telegraphic repeater, etc. In 1872 he organized the Western Electric Manufacturing Company, but in 1874 withdrew from it. In 1876 he claimed to have invented the speaking telephone, but after a memorable litigation that honor was awarded by the courts to Prof. Alexander Graham Bell. In 1893 Professor Gray invented the telautograph, which so far improved the telephone and the telegraph as to transmit the actual handwriting of messages. He established the Gray Electric Company at Highland Park, Ill., and organized the Congress of Electricians, in c
Harper's Encyclopedia of United States History (ed. Benson Lossing), Telephone, the (search)
e......1667 Alexander Graham Bell begins his investigation of electrical transmission and reproduction of articulate speech......July, 1874 Bell constructs an electrical telephone, with a diaphragm of gold-beater's skin, which transmits speech......July, 1875 Thomas A. Edison, furnished by William Orton, president of the Western Union Telegraph Company, with a description of Reis's telephone, begins experiments with a view to producing an articulating telephone......July, 1875 Elisha Gray files his caveat for an invention to transmit the tones of the human voice through a telegraphic circuit, etc......Feb. 14, 1876 Professor Bell publicly explains his method before the American Academy of Arts and Sciences of Boston......May 10, 1876 Bell's telephone exhibited at the Centennial Exhibition at Philadelphia, Pa.......June, 1876 Iron diaphragm first used by Bell......June 30, 1876 Edison's carbon, loud-speaking telephone invented......January, 1877 Professor B
the words of a friend seated by one's side. Gray's electro-harmonic telegraph is founded upon th depend upon the rapidity of the vibrations. Gray's electro-harmonic telegraph. By interruptind are working at this form of apparatus, — Elisha Gray and A. G Bell of the United States, and La 947 and 974 of 1874. In Cour, 2,999 of 1874. Gray's United States patents, 166,094, 156,095, 166,atents, 161,739 of 1875; 174,465 of 1876. In Gray's electric telegraph for transmitting musical tmental of the note it represents. Diagram of Gray's telephonic transmitter and circuits. The tteries is closed unless a key is depressed. Gray's telephonic transmitter, for Composite tones. y has had no part whatever in its operation. Gray's telephonic receiver. If, however, the maicessive magnetizations and demagnetizations. Gray's analyzer, or receiving-instrument. Bell's tan electrical Society, Vol. I. 1875. See also Gray's patent, No. 175,971, dated April 11, 1876.