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Block :: Block (v. t.) A grooved pulley or sheave incased in a frame or shell which is provided with a hook, eye, or strap, by which it may be attached to an object. It is used to change the direction of motion, as in raising a heavy object that can not be conveniently reached, and also, when two or more such sheaves are compounded, to change the rate of motion, or to exert increased force; -- used especially in the rigging of ships, and in tackles..

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..

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

Infratrochlear :: Infratrochlear (a.) Below a trochlea, or pulley; -- applied esp. to one of the subdivisions of the trigeminal nerve..

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

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

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

Taglia :: Taglia (n.) A peculiar combination of pulleys.

Shifter :: Shifter (n.) An arrangement for shifting a belt sidewise from one pulley to another.

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..

Step :: Step (v. i.) One of a series of offsets, or parts, resembling the steps of stairs, as one of the series of parts of a cone pulley on which the belt runs..

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..

Tightener :: Tightener (n.) That which tightens; specifically (Mach.), a tightening pulley..

Sheave :: Sheave (v.) A wheel having a groove in the rim for a rope to work in, and set in a block, mast, or the like; the wheel of a pulley..

Telodynamic :: Telodynamic (a.) Relating to a system for transmitting power to a distance by means of swiftly moving ropes or cables driving grooved pulleys of large diameter.

Trochilus :: Trochilus (n.) An annular molding whose section is concave, like the edge of a pulley; -- called also scotia..

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..

Trochlea :: Trochlea (n.) A pulley.

Face :: Face (n.) The principal dressed surface of a plate, disk, or pulley; the principal flat surface of a part or object..

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

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