 | Luke Hebert - 1836 - 942 頁
...construction of the various parts of machinery : they are usually considered to be six in number ; viz. the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw. It may be easily shewn, however, that these are capable of being reduced to greater... | |
 | Denison Olmsted - 1837 - 374 頁
...the great Pyramid of Egypt. Compare the labor of a man aided by the steam engine with the Egyptians. the Wheel and Axle, the Pulley, the Inclined Plane, the Screw, and the Wedge. THE LEVER. 117. The LEVER is an inflexible bar or rod, some point of which being supported, the rod... | |
 | R T. Linnington - 1837 - 274 頁
...that on which all the other mechanical powers depend. The Mechanical Powers are six in number; viz., the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw: in the various combinations of these all machines exist. The Lever is chiefly... | |
 | Leonard Dunnell Gale - 1838 - 308 頁
...as long to lift it through the same H»ce. LXXII. There are usually reckoned six mechanical powers : the lever ; the wheel and axle ; the pulley ; the inclined plane ; the wedge ; and the screw. THE LEVER. LXXIII. THE LEVER is a bar of iron or wood, supported by and moveable... | |
 | George Leonard (Jr.) - 1839 - 362 頁
...SOMETIMES CALLED MECHANICAL POWERS. LESSON 185. There are usually reckoned six simple machines — the lever, the wheel and axle, the pulley, the inclined plane, the screw, and the wedge. The force that raises a weight, or overcomes a resistance, is called the power. The power is usually... | |
 | Benjamin Greenleaf - 1839 - 356 頁
...The body which receives motion from another, is called the weight. The mechanical powers are five, the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Screw and the Wedge. LEVER. The lever is a bar, movable about a fixed point, called its fulcrum or prop. It is in theory... | |
 | James Ferguson - 1839 - 554 頁
...made. 1 he me' The simple machines, usually called mechanical powers, powers, are six in number, viz. the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screws.0 — They are called mechanical powers, because they help us mechanically to... | |
 | Society for the diffusion of useful knowledge - 1839 - 380 頁
...manner at another point, is a machine. The simple machines or mechanical powers are six in number — the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw. These are the elements of all machines, however complicated. See Mcch., Treat.... | |
 | Frederick Emerson - 1840 - 302 頁
...effected by the direct application of natural strength. They are usually accounted six in number; viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw. The advantage gained by the use of the mechanical powers, does not consist in... | |
 | Frederick Augustus Griffiths - 1840 - 436 頁
...be effected by the natural strength without them. They are usually accounted Six in number ; viz. : The Lever ; the Wheel, and Axle ; the Pulley ; the Inclined Plane ; the Wedge ; and the Screw. Weight, and Power when opposed to each other, signify the body to be moved,... | |
| |
These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw. 
