bell-crank lever

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• bell crank — noun Etymology: so called from the bell wires used to transfer motion : a lever having its fulcrum at the apex of the angle formed by its two arms * * * bell cranked, adj. Mach. a lever or rocker having two arms meeting at a pivot at a right… …   Useful english dictionary

• Bell crank — A lever whose two arms form a right angle, or nearly a right angle, having its fulcrum at the apex of the angle. It is used in bell pulls and in changing the direction of bell wires at angles of rooms, etc., and also in machinery. [1913 Webster] …   The Collaborative International Dictionary of English

• bell crank — bell cranked, adj. Mach. a lever or rocker having two arms meeting at a pivot at a right angle, used for transmitting motion between two parts meeting at an angle. [1880 85] * * * …   Universalium

• bell crank — A double lever in an aircraft control system used to change the direction of motion. Bell cranks are normally used in aileron controls and in the steering system of nosewheels …   Aviation dictionary

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• Mechanical calculator — An old Russian mechanical calculator. A mechanical calculator is a device used to perform the basic operations of arithmetic. Mechanical calculators are comparable in size to small desktop computers and have been rendered obsolete by the advent… …   Wikipedia