507 Mechanical Movements. Mechanisms and Devices - download pdf or read online

By Henry T. Brown

ISBN-10: 0486164675

ISBN-13: 9780486164670

This 1868 compendium of inventive mechanisms employs easy drawings to provide an explanation for 507 of the small elements that represent advanced equipment. Left-hand pages characteristic illustrations, and dealing with pages provide short descriptions of use and operation. starting from basic to advanced, the mechanisms comprise cranks, pulleys, drills, wheels, and screws.

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Extra info for 507 Mechanical Movements. Mechanisms and Devices

Sample text

The power obtained by this contrivance is calculated as follows: Divide the weight by double the number of pulleys in the lower block; the quotient is the power required to balance the weight. 15. Represents what are known as White’s pulleys, which can either be made with separate loose pulleys, or a series of grooves can be cut in a solid block, the diameters being made in proportion to the speed of the rope; that is, 1, 3, and 5 for one block, and 2, 4, and 6 for the other. Power as 1 to 7. 16 and 17.

154. Circular motion into alternating rectilinear motion, by the action of the studs on the rotary disk upon one end of the bell-crank, the other end of which has attached to it a weighted cord passing over a pulley. 155. Reciprocating rectilinear motion into intermittent circular motion by means of the pawl attached to the elbow-lever, and operating in the toothed wheel. Motion is given to the wheel in either direction according to the side on which the pawl works. This is used in giving the feed-motion to planing machines and other tools.

111. Micrometer screw. Great power can be obtained by this device. The threads are made of different pitch and run in different directions, consequently a die or nut fitted to the inner and smaller screw would traverse only the length of the difference between the pitches for every revolution of the outside hollow screw in a nut. 112. Persian drill. The stock of the drill has a very quick thread cut upon it and revolves freely, supported by the head at the top, which rests against the body. The button or nut shown on the middle of the screw is held firm in the hand, and pulled quickly up and down the stock, thus causing it to revolve to the right and left alternately.

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507 Mechanical Movements. Mechanisms and Devices by Henry T. Brown

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