Appleby's Illustrated Handbook of Machinery ...

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E. & F. N. Spon, 1878 - Machinery
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Page 129 - If the ram is fixed at a reasonable distance from the point where the water is to be delivered, the fall necessary to deliver a given quantity is approximately as follows* : — About one-seventh part of the water will be raised to five times the height of the fall, and so on in the same proportion. Thus, if the ram be placed under a head or fall of 10 feet, and the stream delivers 50 gallons per minute, about 7 gallons per minute can be raised to a height of 50 feet, or 3J gallons to a height of...
Page 129 - ... advisable to use a greater fall than is absolutely necessary to raise the required quantity of water to the desired height, as the ram is then subjected to an unnecessary amount of work, the wear and tear of all the parts is increased, and the durability of the whole is proportionately decreased. The proportion between the water raised and that running to waste depends mainly on the height of the spring or source of supply above the ram, relatively with the height to which the water is delivered....
Page 130 - The moment that the level of the water is as low as the horizontal orifice which leads to the discharge, the steam blows through with a certain amount of violence, and being brought into intimate contact with the water in the...
Page 130 - ... an instantaneous condensation takes place, and a vacuum is in consequence so rapidly formed in the just emptied chamber, that the steam ball is pulled over into the seat opposite to that which it had occupied during the emptying of the chamber, closing its upper orifice and preventing the further admission of steam...
Page 138 - Barker's mill. The measuring medium consists of a drum, working on an upright spindle at the bottom, and in a collar at the top. The water is conveyed by the conducting tube into the centre of the drum, and allowed to escape at three or more apertures on the periphery of the same, giving to it a rotary motion. At each revolution of the drum a certain number of cubic inches of water is delivered, so that it is only necessary to register the number of revolutions to ascertain the quantity; this is...
Page 129 - ... varies in proportion to the height to which it is conveyed with a given fall, and the length of the pipe through which the water is forced; the longer the pipe, the greater is the friction to be overcome. It is, however, not unusual to apply a ram for forcing water to a distance of 1,000 yards or more. If the ram is fixed at a reasonable distance from the point where the water is to be delivered, the fall necessary to deliver a given quantity is approximately as follows* :— About one-seventh...
Page 165 - Ibs. per square inch. A pressure of 1 Ib. per square inch is equivalent to a column of water 2 309 feet high = 27'7 inches high. One imperial gallon = '1605 cubic feet.
Page 142 - A, closed by the pressure of the water. For street purposes, this casing is attached to a vertical branch from the water main, and when not in use the outlet of the valve is closed by a loose cover or stopper, and the whole protected from injury by a cast-iron case, similar to the ordinary cases or covers for protecting street cocks or fire-plugs.
Page 164 - MEMORANDA. TABLE OF POWER REQUIRED TO RAISE WATER PROM DEEP WELLS.— This table is based on the assumption that a good class of treble or double barrel pump is used, with an additional retaining valve for lifts above 100 feet. Formula to find horse-power of pumping engines (Appleby) : G, equals the number of gallons required per hour. C, equals the number of cubic feet required per hour. F, equals the height in feet to which...
Page 36 - The jet system of condensation is used, the condensing chamber being formed in the bed-plate. The cock for regulating the supply of injection water, and the air pump are in the foreground of the engraving, the latter of the...

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