Rudimentary Treatise on the Power of Water: As Applied to Drive Flour Mills, and to Give Motion to Turbines and Other Hydrostatic EnginesJ. Weale, 1853 - 148 Seiten |
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Seite 8
... arms cross , by a concentric circle , and the ends of the arms or spokes are secured to the two rims . The spokes proceeding from the inner end of the axis next to the river's bank support the larger or outer rim , and those from the ...
... arms cross , by a concentric circle , and the ends of the arms or spokes are secured to the two rims . The spokes proceeding from the inner end of the axis next to the river's bank support the larger or outer rim , and those from the ...
Seite 38
... arm or crank , and the millstone , which , in such cases , is fixed in an inclined position of 10 or 15 degrees to the horizon , is forced round by it . With these mills they prepare the coarse meal , which , being cooked in steam ...
... arm or crank , and the millstone , which , in such cases , is fixed in an inclined position of 10 or 15 degrees to the horizon , is forced round by it . With these mills they prepare the coarse meal , which , being cooked in steam ...
Seite 50
... arms , also closed at the outer ends , and placed opposite to each other , at right angles with the vertical tube , so as to form a cross . Near to the end of each horizontal pipe , and on one side of it , is a round hole , 50 TURBINES ...
... arms , also closed at the outer ends , and placed opposite to each other , at right angles with the vertical tube , so as to form a cross . Near to the end of each horizontal pipe , and on one side of it , is a round hole , 50 TURBINES ...
Seite 51
... arms , causes the machine to revolve rapidly on its axis , with a velocity nearly equal to that of the effluent water , and with a force proportionate to the hydro- static pressure given by the vertical column , and to the area of the ...
... arms , causes the machine to revolve rapidly on its axis , with a velocity nearly equal to that of the effluent water , and with a force proportionate to the hydro- static pressure given by the vertical column , and to the area of the ...
Seite 52
... arm . This can only be done by the motion already in the arm , and at its expense . Thus there must be a velocity which cannot be over - passed , even by an unloaded machine . But it is also plain , that by making the horizontal arms ...
... arm . This can only be done by the motion already in the arm , and at its expense . Thus there must be a velocity which cannot be over - passed , even by an unloaded machine . But it is also plain , that by making the horizontal arms ...
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aperture applied Archimedean spiral arms axis axle bottom breast-wheel buckets cast-iron cent centre centrifugal force Chew Magna circumference co-efficient column of water conical constructed cubic feet cubic foot curved cylinder depth descending discharge driven effect equal erected experiments fall of water feet in diameter feet long feet per minute fixed float-boards floats flour foot force gallons George Rennie gravity height holes hydraulic impulse inches in diameter inclined iron lower machine machinery meal means mill miller millstones millwrights mode motion nearly Newcastle-on-Tyne notch opening orifice overfall pair passed pipe piston pivot placed Poncelet pressure pressure-engine proportion pumps quantity of water rain rain-gauge raised regulated Rennie requisite reservoir revolutions per minute revolving river Robert Kane round screws shaft sluice Smeaton speed spindle square stream stroke supply of water surface tractory turbine undershot upper stone valve velocity vertical water power water-wheel Westgarth
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Seite 26 - All the rivers run into the sea; yet the sea is not full; unto the place from whence the rivers come, thither they return again.
Seite iii - QC A New, Revised, and considerably Enlarged Edition (the 6th), with very numerous Illustrations. 4s. 6d. cloth limp; 5s. 6d. cloth boards, gilt. 82. THE POWER OF WATER, as applied to drive Flour Mills, and to give motion to Turbines and other Hydrostatic Engines.
Seite 2 - No man shall take the nether or the upper millstone to pledge : for he taketh a man's life to pledge.
Seite 3 - Cease your work, ye maids, ye who laboured in the mill : sleep now, and let the birds sing to the ruddy morning, for Ceres has commanded the water nymphs to perform your task ; these, obedient to her call, throw themselves on the wheel, force round the axle-tree, and by these means the heavy mill.
Seite 66 - ... and, consequently, all those powers are equal, whose products, made by such multiplication, are equal : for if a power can raise twice the weight to the same height, or the same weight to twice the height, in the same time that another power can, the first power is double the second : and if a power can raise half the weight to double the height, or double the weight to half the height, in the same time that another can, those two powers are equal. But note, all this is to be understood in case...
Seite 77 - ... inches, and there impinging upon another body, would be capable of producing an equal effect by collision, as if the same cubic inch had descended through the same space with a slower motion, and produced its effects gradually ; for, in both...
Seite 69 - It is somewhat remarkable, that though the velocity of the wheel, in relation to the water, turns out greater than -J- of the velocity of the water, yet the impulse of the water in the case of a maximum is more than double of what is assigned by theory ; that is, instead of -j- of the column, it is nearly equal to the whole column.
Seite 7 - Great for means of defence against his irresistible legions) would appear to be entirely with a view to raise water sufficiently at low seasons to give it impetus, as well as a more abundant supply to the wheels, and their effect at those times is to create a fall in every part of the width, save the opening left for commerce, through which the water rushes with a moderately irregular surface.
Seite 66 - The raising of a weight, relative to the height to which it can be raised in a certain time, is the most proper measure of power, or, in other words, if the weight raised be multiplied by the height to which it can be raised in a given time...
Seite 68 - ... less, they approach nearer to a coincidence ; and, consequently, in the large openings of mills and sluices, where great quantities of water are discharged from moderate heads, the head of water, and virtual head determined from the velocity, will nearly agree, as experience confirms.* • OBSEEV.