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Key :: Key (n.) A bar, pin or wedge, to secure a crank, pulley, coupling, etc., upon a shaft, and prevent relative turning; sometimes holding by friction alone, but more frequently by its resistance to shearing, being usually embedded partly in the shaft and partly in the crank, pulley, etc..

Gin :: Gin (n.) A machine for raising or moving heavy weights, consisting of a tripod formed of poles united at the top, with a windlass, pulleys, ropes, etc..

Cone Pulley :: Cone pulley () A pulley for driving machines, etc., having two or more parts or steps of different diameters; a pulley having a conical shape..

Tetraspaston :: Tetraspaston (n.) A machine in which four pulleys act together.

Muffle :: Muffle (v. t.) A pulley block containing several sheaves.

Pentaspast :: Pentaspast (n.) A purchase with five pulleys.

Trispaston :: Trispaston (n.) A machine with three pulleys which act together for raising great weights.

Homodromous :: Homodromous (a.) Moving in the same direction; -- said of a lever or pulley in which the resistance and the actuating force are both on the same side of the fulcrum or axis.

Heterodromous :: Heterodromous (a.) Moving in opposite directions; -- said of a lever, pulley, etc., in which the resistance and the actuating force are on opposite sides of the fulcrum or axis..

Idler :: Idler (n.) An idle wheel or pulley. See under Idle.

Pulley :: Pulley (v. t.) A wheel with a broad rim, or grooved rim, for transmitting power from, or imparting power to, the different parts of machinery, or for changing the direction of motion, by means of a belt, cord, rope, or chain..

Mandrel :: Mandrel (n.) The live spindle of a turning lathe; the revolving arbor of a circular saw. It is usually driven by a pulley.

Pulleys :: Pulleys (pl. ) of Pulle.

Gorge :: Gorge (n.) The groove of a pulley.

Drum :: Drum (n.) A cylinder on a revolving shaft, generally for the purpose of driving several pulleys, by means of belts or straps passing around its periphery; also, the barrel of a hoisting machine, on which the rope or chain is wound..

Pulley :: Pulley (b. t.) To raise or lift by means of a pulley.

Trochlea :: Trochlea (n.) A pulley, or a structure resembling a pulley; as, the trochlea, or pulleylike end, of the humerus, which articulates with the ulna; or the trochlea, or fibrous ring, in the upper part of the orbit, through which the superior oblique, or trochlear, muscle of the eye passes..

Machine :: Machine (n.) In general, any combination of bodies so connected that their relative motions are constrained, and by means of which force and motion may be transmitted and modified, as a screw and its nut, or a lever arranged to turn about a fulcrum or a pulley about its pivot, etc.; especially, a construction, more or less complex, consisting of a combination of moving parts, or simple mechanical elements, as wheels, levers, cams, etc., with their supports and connecting framework, calculated to

Swing :: Swing (v. t.) To admit or turn (anything) for the purpose of shaping it; -- said of a lathe; as, the lathe can swing a pulley of 12 inches diameter..

Shiver :: Shiver (n.) A sheave or small wheel in a pulley.

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