Crossword clues for pulley
pulley
Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Pulley \Pul"ley\, v. t.
To raise or lift by means of a pulley. [R.]
--Howell.
Pulley \Pul"ley\, n.; pl. Pulleys. [F. poulie, perhaps of Teutonic origin (cf. Poll, v. t.); but cf. OE. poleine, polive, pulley, LL. polanus, and F. poulain, properly, a colt, fr. L. pullus young animal, foal (cf. Pullet, Foal). For the change of sense, cf. F. poutre beam, originally, a filly, and E. easel.] (Mach.) 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.
Note: The pulley, as one of the mechanical powers, consists, in its simplest form, of a grooved wheel, called a sheave, turning within a movable frame or block, by means of a cord or rope attached at one end to a fixed point. The force, acting on the free end of the rope, is thus doubled, but can move the load through only half the space traversed by itself. The rope may also pass over a sheave in another block that is fixed. The end of the rope may be fastened to the movable block, instead of a fixed point, with an additional gain of power, and using either one or two sheaves in the fixed block. Other sheaves may be added, and the power multiplied accordingly. Such an apparatus is called by workmen a block and tackle, or a fall and tackle. See Block. A single fixed pulley gives no increase of power, but serves simply for changing the direction of motion.
Band pulley, or Belt pulley, a pulley with a broad face for transmitting power between revolving shafts by means of a belt, or for guiding a belt.
Cone pulley. See Cone pulley.
Conical pulley, one of a pair of belt pulleys, each in the shape of a truncated cone, for varying velocities.
Fast pulley, a pulley firmly attached upon a shaft.
Loose pulley, a pulley loose on a shaft, to interrupt the transmission of motion in machinery. See Fast and loose pulleys, under Fast.
Parting pulley, a belt pulley made in semicircular halves, which can be bolted together, to facilitate application to, or removal from, a shaft.
Pulley block. Same as Block, n. 6.
Pulley stile (Arch.), the upright of the window frame into which a pulley is fixed and along which the sash slides.
Split pulley, a parting pulley.
Douglas Harper's Etymology Dictionary
late 13c., from Old French polie, pulie "pulley, windlass" (12c.) and directly from Medieval Latin poliva, puliva, probably from Medieval Greek *polidia, plural of *polidion "little pivot," diminutive of Greek polos "pivot, axis" (see pole (n.2)). As a verb from 1590s.
Wiktionary
n. One of the simple machines; a wheel with a grooved rim in which a pulled rope or chain will lift an object (more useful when two or more pulleys are used together such that a small force moving through a greater distance can exert a larger force through a smaller distance). vb. (context transitive English) To raise or lift by means of a pulley.
WordNet
n. a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope [syn: pulley-block, block]
Wikipedia
Pulley is a Californian punk rock band formed in 1994. The band is known for straightforward, hard-edged melodic punk rock.
A pulley is a mechanical device used to transfer mechanical energy.
Pulley may also refer to:
- Pulley (band) a punk-rock band
- Pulley, Shropshire, a village
- Gerald P. Pulley, an American photographer
- Sheila Maid, an over-head clothes rack, which is a called a 'pulley' in Scotland
A pulley is a wheel on an axle or shaft that is designed to support movement and change of direction of a taut cable or belt along its circumference. Pulleys are used in a variety of ways to lift loads, apply forces, and to transmit power. In nautical contexts, the assembly of wheel, axle, and supporting shell is referred to as a "block."
A pulley may also be called a sheave or drum and may have a groove or grooves between two flanges around its circumference. The drive element of a pulley system can be a rope, cable, belt, or chain that runs over the pulley inside the groove or grooves.
Hero of Alexandria identified the pulley as one of six simple machines used to lift weights. Pulleys are assembled to form a block and tackle in order to provide mechanical advantage to apply large forces. Pulleys are also assembled as part of belt and chain drives in order to transmit power from one rotating shaft to another.
Usage examples of "pulley".
Springs, alembics, coils of copper tubing, buckled sheets of metal, gear systems both rack-and-pinion and epicyclic, pendulums, levers, cams, cranks, differentials, bearings, pulleys, assorted tools, and stone jars containing alkahest and corrosive substances crowded every horizontal surface.
The skiff dropped down the side of the cog, the lines whirring through the pulleys.
Without this advanced system of cable and pulley, diplodocus could have activated neither her neck nor her tail, and she could not have survived.
The muscle innervated passes through a ring of connective tissue so that it resembles a small pulley, whence the name.
It suddenly touched bottom, but a big wave made the boat heel, and Javel, junior, who was in the bows directing the lowering of the net, staggered, and his arm was caught in the rope which the shock had slipped from the pulley for an instant.
I shake my traveling risers loose from my full-body harness, slide my hands over the crowded gear sling that we call a rack, find the two-bearing pulley by feel, clip it on to the riser ring with a carabiner, run a Munter hitch into a second carabiner as a friction-brake backup to the pulley brake, find my best offset-D carabiner and use it to clip the pulley flanges together around the cable, and then run my safety line through the first two carabiners while tying a short prusik sling onto the rope, finally clipping that on to my chest harness below the risers.
Aenea once told me that there used to be fixed carbon-carbon lines running the length of the slideway, and the sledders had clipped on to them much as we would a cableway or rappel line, using a special low-friction clip ring similar to the cable pulley to keep from losing speed.
Daryll and Mathias had set up a small quintain, a man-shaped dummy on a series of ropes and pulleys, so that it would move.
Further progress in mechanics was made by Cardan who explained the lever and pulley, and by Simon Stevin who first demonstrated the resolution of forces.
To use its pulley and winch for clearing the boulder, to check the bluff in case he was still up there, for whatever reason, Teasle must have radioed for it almost immediately.
The tellurium is comprised of brass or wooden balls representing the Sun, Earth, and Moon with associated gears, arms, and pulleys, and is used to demonstrate the mechanics of eclipses and of the seasons.
And if you were inclined to tinker with the vehicleby removing sound deadeners, undercoating, sway bars and interior wheel wells and playing around with the pulleys and cylinder heads, for instanceyou could goose the effective hp up to 450.
Dogras, Rajputs, Jats, Baluchis, Garhwalis clutched at the little pulleys over their cots, pulled themselves up with painful efforts, and saluted.
Aenea once told me that there used to be fixed carbon-carbon lines running the length of the slideway, and the sledders had clipped on to them much as we would a cableway or rappel line, using a special low-friction clip ring similar to the cable pulley to keep from losing speed.
I shake my traveling risers loose from my full-body harness, slide my hands over the crowded gear sling that we call a rack, find the two-bearing pulley by feel, clip it on to the riser ring with a carabiner, run a Munter hitch into a second carabiner as a friction-brake backup to the pulley brake, find my best offset-D carabiner and use it to clip the pulley flanges together around the cable, and then run my safety line through the first two carabiners while tying a short prusik sling onto the rope, finally clipping that on to my chest harness below the risers.