Scientific American Volume 123

Scientific American Volume 123

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920-07 edition. Excerpt: ...first alternating current central station of London was built by S. Z. tie Fcrranti somewhat later, and it served as a model for subsequent installations. In 1887 Nikola Tesla invented the polyphase alternating current motor which made it possible to transmit electrical energy still more economically. The first alternating current machlne for generating polyphase current seems to have been built in 1888 by Hasselwander. In the same year Chas. S. Bradley patented a twophase motor. The first installation for transmitting multi-phase alternating current at high tension was built in 189. by von Dolivo-Dobrowolski of Berlin, between Lauffen and Frankfurt. Refinement after refinement followed from that day to this. The introduction of the steam turbine caused the building of still larger generators than were used with the greatest of reciprocating engines. The demand for cheap electric power caused the harnessing of mountain streams and the transmission of the power many hundred miles to the consumers in the distant cities. The nickel-iron storage battery came into use. being invented by the 'Swedish engineer, Jungner, but perfected and placed on the market by Edison. The Rise of the Electric Motor Peculiarly enough, the motor antedates the generator. Indeed, any of the electro-magnetic motors in which the current was reversed would have generated a current so strong, it they had been rotated backward, that its presence could not have escaped notice. Yet hundreds of these machines were experimented with for Ccntcr: Original electric welding transformer invented by Elihu Thomson and extensively used as early The peculiar feature of this lamp was the use of the carbon plates 10 inches wide, hctween which played the are Milestones in more

Product details

  • Paperback | 740 pages
  • 189 x 246 x 38mm | 1,297g
  • United States
  • English
  • black & white illustrations
  • 1236776062
  • 9781236776068