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Ives, Frederic Eugene

(Encyclopedia)Ives, Frederic Eugene, 1856–1937, American inventor, b. Litchfield, Conn. A pioneer in the development of orthochromatic and trichromatic photography and of photoengraving, he followed an earlier su...

gear

(Encyclopedia)CE5 Types of gears gear, toothed wheel, cylinder, or cone that transmits motion from one part of a machine to another; it is one of the oldest means of transmitting motion. When the teeth of two g...

crank

(Encyclopedia)crank, mechanical linkage consisting of a bar attached to a pivot at one of its ends in such a way that it is capable of rotating through a complete circle about the pivot. One of the principal uses o...

Edison, Thomas Alva

(Encyclopedia)Edison, Thomas Alva, 1847–1931, American inventor, b. Milan, Ohio. A genius in the practical application of scientific principles, Edison was one of the greatest and most productive inventors of his...

Zsigmond, Vilmos

(Encyclopedia)Zsigmond, Vilmos, 1930–2016, Hungarian-American cinematographer. As a film student in Budapest, he and fellow student (and later cinematographer) Laszlo Kovacs secretly filmed the street fighting as...

Eakins, Thomas

(Encyclopedia)Eakins, Thomas āˈkĭnz [key], 1844–1916, American painter, photographer, and sculptor, b. Philadelphia, where he worked most of his life. Eakins is considered the foremost American portrait painte...

Hays, Will H.

(Encyclopedia)Hays, Will H., 1879–1954, American politician and motion-picture executive, b. Sullivan, Ind.; his original name was William Harrison Hays. Hays became active in Indiana political affairs, was chair...

rotary engine

(Encyclopedia)rotary engine, internal-combustion engine whose cycle is similar to that of a piston engine, but which produces rotary motion directly without any conversion from reciprocating motion. A major problem...

Goldwyn, Samuel

(Encyclopedia)Goldwyn, Samuel gōlˈdwĭn [key], 1882–1974, American film producer, b. Warsaw, Poland. Goldwyn arrived in the United States in 1896, and with Jesse L. Lasky and Cecil B. De Mille he organized the ...

Barnard's star

(Encyclopedia)Barnard's star, star with the largest observed proper motion (rate of motion across the sky with respect to other stars); located in the constellation Ophiuchus. The star's large proper motion, 10.28�...