 | Edward Cresy - 1847 - 912 pages
...and the several machines described for defence, show a thorough acquaintance with the properties of the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw ; and Euclid's Elements, collected about 280 years before Christ, for the instruction of the pupils... | |
 | James Bates Thomson - Arithmetic - 1847 - 432 pages
...the breadth 35 ft., and the depth 25 ft. ? MECHANICAL POWERS. 648. The Mecfianical powers are six, viz: the lever, the wheel and axle, the pulley, the inclined plane, the screw, and the wedge. 649. When the pmtxr and weight, act perpendicularly to the arms of a straight,... | |
 | Miles M. Rodgers - Agriculture - 1848 - 306 pages
...and beautiful pieces of machinery which have ever been constructed. These few elementaiy powers are, the lever, the wheel and axle, the pulley, the inclined plane, the wedge and the screw. The lever is a straight bar placed upon a supporting point called a fulcrum, with the resistance which... | |
 | Olinthus Gilbert Gregory - 1848 - 572 pages
...301 bs., to the same height. 3. The number of the mechanical powers is usually reckoned to be six : viz. the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screrc. 4. In treating of these machines, we use the word power, to denote the force which is supposed... | |
 | James Bates Thomson - Arithmetic - 1848 - 432 pages
...ft., the breadth 35 ft., and the depth 25 ft. 1 MECHANICAL POWERS. G48. The Mechanical powers are six, viz: the lever, the wheel and axle, the pulley, the inclined plane, the screw, and the wedge. 649. When the pi.wer and weight act perpendicularly to the arms of a straight... | |
 | John Bonnycastle - Geometry - 1848 - 320 pages
...Powers are the most simple of mechanical applications to increase force and overcome resistance. They are usually accounted six in number, viz. The Lever —The Wheel and Axlt—The Pulley— The Inclined Plane — The Wedge — and the Screw. LEVER. To make the principle... | |
 | John Bonnycastle - Geometry - 1848 - 312 pages
...Powers are the most simple of mechanical applications to increase force and overcome resistance. They are usually accounted six in number, viz. The Lever —The Wheel and Axle—The Pulley— The Inclined Plane — The Wedge— and the Screw. LEVER. To make the principle... | |
 | Minard Lafever - Architecture - 1849 - 306 pages
...be effected by the natural strength without them. The simple machines, called Mechanical powers, are six in number ; viz. the lever, the wheel and axle,...pulley, the inclined plane, the wedge, and the screw ; and of these all the most compound engines consist. The general principle is, that the power or advantage... | |
 | Daniel Adams - Arithmetic - 1849 - 142 pages
...simple machines, employed to facilitate the moving of weights or the overcoming of resistance. They are six in number ; viz., the Lever, the Wheel and Axle,...Pulley, the Inclined Plane, the Wedge, and the Screw. In mechanical powers and in machinery, the thing to be moved, or the resistance to be overcome, is... | |
 | John Craig (F.G.S.) - 1849 - 1148 pages
...mechanics in philosophy ; acting by physical power. Mechanical powers, or elementary machines, are the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw: to which some writers have added the rope-machine and the balance. All these, however, may be reduced... | |
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MECHANICAL POWERS are certain simple instruments employed in raising greater weights, or overcoming greater resistance than could be effected by the direct application of natural strength. They are usually accounted six in number; viz. the Lever, the... 
