The Operative Mechanic, and British Machinist: Being a Practical Display of the Manufactories and Mechanical Arts of the United Kingdom, Τόμος 1T. Desilver, jun., 1831 |
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Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
action angle aperture applied arms axis axle barrel beam boiler bottom brass bucket cast-iron centre centrifugal force circle circumference cistern cock cog-wheel column communication condenser construction crank cylinder descend diameter direction distance effect engine epicycloid equal fall fastened feet fixed flaunch flax float float-boards force four frame friction frustrum geer groove gudgeon hole horizontal inches inclined plane iron iron cross leather length lever lower machine machinery manner means mill mill-stone minute motion move Parcieux pass perpendicular piece pinion pipe piston placed plate pounds pounds weight pressure prevent produce pulley pump quantity of water radius raised ratchet-wheel resistance rising rollers rope round sails screw shaft shuttle side slide sluice space spindle square steam steam-engine stroke surface teeth thickness tion treadle trough tube turn upper valve velocity vertical vessel water-wheel weight wheel wind
Δημοφιλή αποσπάσματα
Σελίδα ii - District Clerk's Office. BE IT REMEMBERED, that on the tenth day of August, AD 1829, in the fifty-fourth year of the Independence of the United States of America, JP Dabney, of the said district, has deposited in this office the...
Σελίδα 245 - Elevation des eaux par toute sorte de machines, re'duite a la mesure, au poids, a la balance, par le moyen d'un nouveau piston et corps de pompe ; et d'un nouveau mouvement cyclo-elliptique, et rejetant l'usage de toute sorte de manivelle ordmaires, par le Chevalier Moreland.
Σελίδα 57 - He broke a rope of two inches in circumference ; though, from his awkward manner, he was obliged to exert four times more strength than was necessary. He lifted a rolling stone of eight hundred pounds' weight with his hands only, standing in a frame above it, and taking hold of a chain fastened thereto.
Σελίδα 142 - ... and a second quantity will be had. Multiply the area of the millstone by the weight of a cubic foot of the same stone, for a third quantity. Multiply the first quantity by the second, and divide the product by the third, and the quotient will be the weight required. 2. To find the number of cubic feet in the turning millstone, supposing it to have no eye : — From the weight of the spindle and lantern subtract the quantity found by the preceding rule, for the first number. Subtract this first...
Σελίδα 247 - ... the weight or pressure of the outward air upon the water in the vessel K ; and therefore at the first stroke the outward air will press up the water through the notched foot A into the lower pipe about as far as e; this will condense the rarefied air in the pipe between e and c to the same state it was in before ; and then, as its spring within the pipe is equal to the force or pressure of the outward air, the water will rise no higher by the first stroke ; and the valve...
Σελίδα 113 - ... 4. Divide the circumference of the wheel in feet by the velocity of its floats in feet per second, and the quotient will be the number of seconds in which the wheel turns round.
Σελίδα 176 - First, I use two vessels in which the steam is to act, and which in other steam engines are called cylinders. Secondly, I employ the steam after it has acted in the first vessel to operate a second time in the other, by permitting it to expand itself...
Σελίδα 224 - The buckets have a lateral orifice, to receive and to discharge the water. The axis of this wheel is embraced by four small beams, crossing each other at right angles, tapering at the extremities, and forming eight little arms. This wheel is near the centre of the horse-walk, contiguous to the vertical axis, into the top of which the...
Σελίδα 230 - Q be opened, the water and air rush out together with prodigious violence, and the drops of water are changed into hail or lumps of ice. It is a sight usually shown to strangers, who are desired to hold their hats to receive the blasts of air: the ice comes out with such violence as frequently to pierce the hat like a pistol bullet.
Σελίδα 7 - Powers, are certain simple instruments, commonly employed for raising greater weights, or overcoming greater resistances, than could be effected by the natural strength without them. These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw.