inventor, Granville Woods developed the railroad telegraph, a
device that transmitted messages, through static electricity,
between moving trains.
in Columbus, Ohio, Woods was formally educated until the age of
ten when he took a job in a machine shop. In 1885 Woods began
working on what he called "telegraphony," a device that
allowed users to switch between two forms of communication, voice
or Morse code, to transmit messages.
on "telegraphony," Woods invented the induction telegraph
in 1887. Prior to its creation, moving trains were unable to communicate
with each other or with rail stations, resulting in dangerous
situations. The induction telegraph used static electricity from
the existing telegraph lines running parallel to the train tracks,
making messaging possible between moving trains and rail stations.
later inventions dealt with more efficient use of electricity.
He created an overhead conducting system for rail and trolley
cars to run on electric current instead of steam power. In addition,
he devised a third rail that is still often used on many rail
lines; the third rail carries electricity via electromagnetic
switches and pulls trains along. He also improved the automatic
air brake used by railroad cars. His patents were eventually bought
and used by General Electric and the Westinghouse Air Brake Company.
Vinton G. Cerf
Robert E. Kahn
Robert W. Gore
Richard M. Hoe
John H. Thomas