Lloyd Espenschied

Lloyd Espenschieds (* April 27, 1889 in St. Louis, † 1 June 1986 ) was an American electrical engineer.

Growing up is Espenschieds from 1901 in Brooklyn with relatives of his mother. After he graduated in 1909 at the Pratt Institute, he worked at the Telefunken Wireless Telegraph Company, for which he installed radio systems in ships of the U.S. Navy. In 1910 he joined the development department of AT & T ( later Bell), where he worked on bespulten lines. Around 1915, he experimented with tubes and Long-distance radio telephone. The following year, he tested a radio link between Arlington, Virginia and Pearl Harbor, Hawaii.

1916-18 he worked with several colleagues, as Herman A. Affel on a carrier frequency system between Baltimore and Pittsburgh.

In 1927 he acquired a patent for quartz filters as bandpass filters.

Together with Affel he reported on May 23, 1929, a patent for a Concentric Conducting system (coaxial cable with frequency-division multiplexing ), which was issued on December 8, 1931.

1924 collision detection for railway trains it has been patented. A similar technique he used for the radio altimeter, which produced the Western Electric Company in 1937.

Espenschieds held a total of more than 130 patents. On basis of his services for the telecommunications him a Medal of Honor ( Medal of Honor ) in 1940 by the Institute of Radio Engineers, a predecessor of today's IEEE awarded.

The AT & T announced in January 2008 that her for the invention of the high-frequency broadband cable by Lloyd Espenschieds in 1929 in 2008 which had been Technology & Engineering Emmy Award from the National Academy of Television Arts & Sciences.