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Simple Machines, Pulleys |
Record 1 to 25 of 61 |
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Barrel and fusee "This is done in the mechanism of the watch, of which a, is the barrel containing the power in the form of a convoluted spring, and b the fusee which acts as a varying lever, and through which motion ... |
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Block and Tackle "A Block is a pulley or a system of pulleys rotating on a pintle mounted in its frame or shell with its band and strap. There are many kinds of blocks, as a pulley block, a fiddle block, a fish block,... |
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Block and tackle "Combinations of pulleys are made in great variety. In the forms most commonly used, one continuous cord passes around all the pulleys. Frequently two or more sheaves are mounted in the same block a... |
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Block and Tackle "A combination of fixed and immovable pulleys, employed to secure what engineers call a large 'mechanical edge.'"... |
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Compound pulley "If the number of ropes be increased, the weight may be increased with the same power; or the power may be diminished in proportion as the number of ropes is incrased." -Comstock 1850... |
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Compound pulley "...there is a system of pulleys represented, in which the weight is sixteen times the power." -Comstock 1850... |
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Compound pulley "Compound pulleys using one fixed and two moveable pulleys to pull a weight up by applying a downward force." -Avery 1895... |
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Compound pulley "Compound pulley designed to use very little power to lift heavy weights." -Avery 1895... |
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Crown pulley A pulley with a convex rim, much used where various cases belts are in danger of slipping off. ... |
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Differential pulley "In the differential pulley, an endless chain is reeved upon a solid wheel that has two grooved rims and is carried in a fixed block above, and upon a pulley below." — Avery, 1895 ... |
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Fixed and moveable pulley "A moveable pulley is seldom used alone. It is generally combined with a fixed pulley, as shown [here]." —Quackenbos 1859... |
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Fixed pulley "A pulley is a wheel having a grooved rim for carrying a rope or other line, and tuning on an axis carried in a frame, called a pulley block. The pulley is fixed if the block is stationary." — ... |
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Fixed Pulley "A fixed pulley is one whose block is not movable. In this case, if the weight W be lifted by pulling down P, the other end of the cord W will evidently move the same distance upwards that P moves dow... |
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Fixed pulley "[This illustration] represents a fixed pulley. The block is attached to a projecting beam. P is the power, and W the weight. For every inch that P descends, W ascends the same distance." —Quack... |
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Flat Rope pulley A pulley with a sheave having its perimeter a rectangular or nearly rectangular groove. Used for transmitting power by ropes or bands. ... |
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Friction Wheel "In machinery, a form of slip-coupling applied in cases where the variations of load are sudden and great, as in dredging-machinery, etc. In the form illustrated a strong pulley, B, is keyed on the dr... |
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Fusee, the "A key is used to turn the cone, B. By doing so it wraps the chain around the cone and tightly coils the spring inside the barrel, A. The spring draws the chain off of the cone turning the barrel." &m... |
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Gin-Block "GIN-BLOCK. A simple form of tackle-block with a single wheel, over which a rope runs. It has a hook by which it swings from the jib of a crane or the sheer of a gin." -Whitney, 1911... |
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Movable pulley "A pulley is a wheel having a grooved rim for carrying a rope or other line, and turning on an axis carried in a frame, called a pulley block. The pulley is movable if the block moves during the acti... |
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Movable Pulley "A movable pulley is one whos block is movable. One end of the cord is fastened to the beam, and the weight is sspended from the pulley, the other end of the cord being drawn by the application of a f... |
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Moveable pulley "[This illustration] represents a moveable pulley. A is the wheel. One end of the rope is fastened to a support at D, while the power is applied to the other at P." —Quackenbos 1859... |
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Multiple fixed pulleys "System of moveable pulleys. Each pulley has a separate rope attached to a fixed support at one end." —Quackenbos 1859... |
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Multiple pulleys "When a high degree of force is required, several moveable pulleys may be combined, as represented [here]. A and B are fixed pulleys; C and D are moveable ones, from the block of which the weight W is... |
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Pulley A man using a pulley to lift a heavy barrel. ... |
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Pulley A wheel for transmitting power from, or imparting it to the different parts of machinery, or for changing the direction of motion by means of a belt, cord, or rope.... |
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