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Published on Dec 22, 2007
Computer History Museum Tour Playlist http://www.youtube.com/playlist?list=... 1951 UNIVAC I Mercury delay line Memory Tank. The UNIVAC computer was used to accurately predict the 1952 Election win of Dwight D. Eisenhower. Results were not immediately reported by Walter Cronkite because they were not believed to be accurate. Computer History Museum Tour 19
http://cs-exhibitions.uni-klu.ac.at/i... Mercury was used because the acoustic impedance of mercury is almost exactly the same as that of the piezoelectric quartz crystals; this minimized the energy loss and the echoes when the signal was transmitted from crystal to medium and back again. The high speed of sound in mercury (1450 m/s) meant that the time needed to wait for a pulse to arrive at the receiving end was less than it would have been a slower medium,
More design details are described in the original US Patent: 2629827 Filing date: Oct 31, 1947 Issue date: Feb 24, 1953 pages 6-8 has more detailed explanation on the delay line. http://www.google.com/patents/US26298...