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piezoelectric effect

(Encyclopedia)piezoelectric effect pīēˌzōĭlĕkˈtrĭk [key], voltage produced between surfaces of a solid dielectric (nonconducting substance) when a mechanical stress is applied to it. A small current may be ...

Kilby, Jack St. Clair

(Encyclopedia)Kilby, Jack St. Clair, 1923–2005, American electrical engineer, b. Jefferson City, Mo., B.S. Univ. of Illinois, 1947, M.S. Univ. of Wisconsin, 1950. In 1958, Kilby began working for Texas Instrument...

pulley

(Encyclopedia)CE5 Pulleys: The mechanical advantage (MA) of a system of pulleys is equal to the number of supporting strands: in A MA=1 and in B MA=2. pulley, simple machine consisting of a wheel over which a r...

levitation

(Encyclopedia)levitation lĕvĭtāˈshən [key], the raising of a human or other body in the air without mechanical aid. The idea is ancient; holy men, both pagan and Christian, were reputed to have had the power o...

Reynolds, Osborne

(Encyclopedia)Reynolds, Osborne, 1842–1912, British mechanical engineer. He was educated at Cambridge and became (1868) the first professor of engineering at the Univ. of Manchester, where his courses attracted a...

engineering

(Encyclopedia)engineering, profession devoted to designing, constructing, and operating the structures, machines, and other devices of industry and everyday life. Until the Industrial Revolution there were only t...

analog-to-digital conversion

(Encyclopedia)analog-to-digital or A/D conversion, the process of changing continuously varying data, such as voltage, current, or shaft rotation, into discrete digital quantities that represent the magnitude of th...

ball-and-socket joint

(Encyclopedia)ball-and-socket joint, in engineering, mechanical connection used between parts that must be allowed some relative angular motion in nearly all directions. As the name implies, the joint consists esse...

Virginia Polytechnic Institute and State University

(Encyclopedia)Virginia Polytechnic Institute and State University, better known as Virginia Tech, at Blacksburg; land-grant and state supported; coeducational; chartered and opened 1872 as an agricultural and mecha...

governor, device

(Encyclopedia)governor, automatic device used to regulate and control such variables as speed or pressure in the functioning of an engine or other machine. A governor may be an electric, hydraulic, or mechanical de...