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He also developed a portable x-ray machine. [ 7 ] [ 14 ] [ 18 ] He also developed an early prototype of a snowmobile. It was a "snow machine" that attached skis to the undercarriage of an airplane fuselage and attached a propeller, and a sound track synchroniser (later selling the patent to RCA).
An X-ray generator generally contains an X-ray tube to produce the X-rays. Possibly, radioisotopes can also be used to generate X-rays. [1]An X-ray tube is a simple vacuum tube that contains a cathode, which directs a stream of electrons into a vacuum, and an anode, which collects the electrons and is made of tungsten to evacuate the heat generated by the collision.
Caldwell was born in Savannah, Missouri, to attorney William W. Caldwell and the former Camilla Kellogg. [1] [2] He showed an early interest in mechanical and electrical devices, having grown up in an era during which a number of electrical innovations had been significantly refined, including the electric light, telephones, and transatlantic telegraph cables.
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In 1999, Time placed Shoe-Store X Rays on a list of the 100 worst ideas of the 20th century. [29] [30] A shoe-fitting fluoroscope appeared on a 2011 episode of the History series American Restoration. [31] Its radionuclide source was found to be so dangerous that it was removed and replaced with a static X-ray. [32]
William David Coolidge (/ ˈ k uː l ɪ dʒ /; October 23, 1873 – February 3, 1975) [1] was an American physicist and engineer, who made major contributions to X-ray machines. He was the director of the General Electric Research Laboratory and a vice-president of the corporation.
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