Coolidge, William D.

Inventor of the “Coolidge Tube”, made medical x-rays safe and convenient

Price: $60.00

Description:
(1875-1973) American medical inventor, joined General Electric's Research Laboratory 1905. With lifelong colleague Colin G. Fink developed ductile tungsten (1910), which to replaced carbon as the preferred filament of incandescent light bulbs, still used as such today. Coolidge's innovations covered magnetized steel, radar systems, and the electric blanket. He was awarded 83 patents. Coolidge was immortalized for invention of a vacuum tube for generating x-rays (the "Coolidge tube"). This device (patent #1,203,495, granted in 1913) made the use of x-rays for medical diagnosis safe and convenient. X-rays are a form of energy that travels in waves much smaller than those of visible light. Coolidge's machine allowed these waves easily to be produced by the impact of high-energy electrons on a tungsten anode within a vacuum tube, and then to be directed through a substance onto a photographic plate. Denser materials within the substance being scanned absorb more x-rays, and thus produce a brighter photographic image on the plate. He invented a portable model for use during WW I. Despite subsequent advances, Coolidge's basic design has never been superseded. Signed 2 ¼ x 3 ½ card, adds Schenectady, N. Y., January 24 1947 date.

Condition: Very good
Type:Signature






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