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Wilson, Charles Erwin

(Encyclopedia)Wilson, Charles Erwin, 1890–1961, American industrialist and cabinet officer, b. Minerva, Ohio. He was an electrical engineer with Westinghouse Electric and Manufacturing Company from 1909 to 1919 a...

vacuum cleaner

(Encyclopedia)vacuum cleaner, mechanical device using a draft of air to remove dust, loose dirt, or other particulate matter from dry surfaces. It is especially useful on highly textured surfaces, such as carpets a...

barrel organ

(Encyclopedia)barrel organ, mechanical musical instrument requiring nothing but the regular rotary motion of a handle to keep it going. It probably originated at the beginning of the 18th cent., and was once used e...

fuel cell

(Encyclopedia)fuel cell, electric cell in which the chemical energy from the oxidation of a gas fuel is converted directly to electrical energy in a continuous process (see oxidation and reduction). The efficiency ...

windmill

(Encyclopedia)windmill, apparatus that harnesses wind power for a variety of uses, e.g., pumping water, grinding corn, driving small sawmills, and driving electrical generators. Windmills were probably not known in...

Harvey, George Brinton McClellan

(Encyclopedia)Harvey, George Brinton McClellan, 1864–1928, American journalist and diplomat, b. Peacham, Caledonia co., Vt. After a career in journalism and insurance, he became involved in the construction and a...

Gujrat

(Encyclopedia)Gujrat go͝ojərätˈ [key], city, NE Pakistan. It is near the Chenab River and on a major road ...

optical sensing

(Encyclopedia)optical sensing, in general, any method by which information that occurs as variations in the intensity, or some other property, of light is translated into an electric signal. This is usually accompl...

Alliance

(Encyclopedia)Alliance. 1 City, seat of Box Butte co., NW Nebr., in the High Plains; founded 1887 as Grand Lake, renamed and inc. 1888. Located in a farming and ranching region, it is a shipping c...

Hendrix, Jimi

(Encyclopedia)Hendrix, Jimi (James Marshall Hendrix), 1942–70, African-American rock guitarist, b. Seattle, Wash. Hendrix, in his short musical career, was known for an innovative and extremely influential guitar...