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" ... most compact and useful, perhaps, that has yet been invented. It consists of a number of concentric grooves, whose respective diameters are regulated by the quantity of cord which must pass over their peripheries in equal spaces of time. In this system... "
Young Scientist: A Practical Journal for Amateurs - Page 187
1851
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The Principles of Mechanics ...: To which is Now Added, an Appendix ...

William Emerson - Mechanical engineering - 1825 - 506 pages
...against the raoveable block; and the rope v or the power P acts with the force of one or unit. Therefore the power is to the weight, as 1 to the number of ropes pulling at the moveable block A. ^ .. , j, > Cor. Hence the power is . to tlie force by which...
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Mechanics' Magazine, Volume 5

Technology - 1826 - 478 pages
...suspended from the rising pulleys. For according to Emerson, when pulleys are made use of in this manner "The power is to the weight, as 1 to the number of parts of the repe acting against the moveable block." Now by altering the disposition of the terms,...
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Mechanics Magazine, Volume 5

Industrial arts - 1826 - 490 pages
...suspended from the rising pulleys. For according to Emerson, when pulleys are made use of in this manner "The power is to the weight, as 1 to the number of parts of the rape acting against the moveable block." Now' by altering the disposition of the terms,...
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The Register of Arts, and Journal of Patent Inventions, Volume 3

Luke Herbert - Industrial arts - 1829 - 394 pages
...peripheries in equal spaces of time. In this system and all others where a single cord is employed, the power is to the weight as .1 to the number of parts of the cord acting on the lower block, or as 1 to twice the number of pullies in the lower block,...
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The Register of arts, and journal of patent inventions, ed. by L ..., Volume 3

Luke Hebert - 1829 - 392 pages
...peripheries in equal spaces of time. In this system and all others where a single cord is employed, the power is to the weight as .1 to the number of parts of the cord acting on the lower block, or as 1 to twice the number of pullies in the lower block,...
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Institutes of Natural Philosophy: Theoretical and Practical

William Enfield - Astronomy - 1832 - 282 pages
...velocity of the power will be quadruple ofthat of the weight, or as 4 to 1, &c. In all cases, therefore, when the power is to the weight, as 1 to the number of ropes passing from the upper to the lower pulleys, there will be an equilibrium. Or thus ; Every moveable...
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The Engineer's and Mechanic's Encyclopędia: Comprehending ..., Volume 2

Luke Hebert - Industrial arts - 1835 - 938 pages
...weight, and the power will be to the weight as 1 to 6. In every combination of this kind, therefore, the power is to the weight as 1 to the number of cords supporting the lower block, or as 1 to twice the number of sheaves in the fall. A modification...
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The Principles of Mechanics: Explaining and Demonstrating the General Laws ...

William Emerson - Mechanical engineering - 1836 - 498 pages
...against the moveable block ; and the rope ti or the power P acts with the force of one or unit. Therefore the power is to the weight, as 1 to the number of ropes pulling at the moveable block A. Cor. Hence the power is to the force by which the immoveable...
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A New System of Arithmetic: In which is Explained and Applied to Practical ...

Calvin Tracy - Arithmetic - 1842 - 306 pages
...effected. A double movable pulley is represented at Fig. 2. By such a pulley an equilibrium is produced, when the power is to the weight as 1 to the number of ropes sustaining the weight If a single movable pulley be employed the weight is sustained by two ropes...
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Iconographic Encyclopaedia of Science, Literature, and Art, Volume 1

Johann Georg Heck - Encyclopedias and dictionaries - 1851 - 712 pages
...38 and 31), the weight, W, is attached to the movable pulleys, and the power, P, acts upon the lasl fixed pulley : in fig. 40, the relation is just the...to the number of strings stretched by the weight. l\\fg. 38, or the power pulley, the pulleys are placed one above the other, and the statical relation...
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