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Double Stopper Light Bulb

  • Cheap manufacturing process
  • incandescent lamp
  • avoided Edison's one-piece construction by designing a two-piece stopper lamp
  • not that efficient
  • vacuum could not be retained as long with a two piece construction
  • Westinghouse's patent
  • A glass stopper was glued into the end
  • Tesla - the AC power system
  • Tesla had a large display including phosphorescent lighting (a precursor to fluorescent lamps) powered without wires by high-frequency fields and the Egg of Columbus
  • The lamps were only produced for one year
  • The success of the Tesla Polyphase System installed at the exposition ensured Westinghouse would be selected to harness Niagara, which ended the War of the Currents
  • The Edison patents expired in 1894

World Fair

  • both bid to light the fair
  • Westinghouse won
  • Tesla planned on using GE bulbs

Background

  • Edison would not sell to Tesla
  • So developed a more efficient bulb
  • 1882 - Edison began using DC to power a street in New York

A double-stopper light bulb

  • 1883 - Tesla built his first transformer that turns AC from low voltage to high voltage
  • AC power could travel much further
  • 80s and 90s -battle for who would light the country
  • First Battle - World Fair

Rachel Okun

Reference

Lighting the 1893 World’s Fair: The Race to Light the World

The History Rat

by R.T. Johnson

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