Handbook on Engineering: The Practical Care and Management of Dynamos, Motors, Boilers, Engines, Pumps, Inspirators and Injectors, Refrigerating Machinery, Hydraulic Elevators ... Air Compressors ... and All Branches of Steam EngineeringH.C. Tulley & Company, 1902 - 906 páginas |
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Otras ediciones - Ver todas
Términos y frases comunes
adjusted alternating current amperes armature automatic belt binding post boiler brushes carbon cause cent check valve circuit coal commutator compound engine compression condenser connected Corliss engine crank cross-head cubic cubic foot curve dead center diagram diameter direction distance divide drum eccentric eccentric rod electromotive force elevator equal evaporated exhaust valves expansion fire furnace gauge governor horse power horse-power increase injector iron lamps length lever load low pressure cylinder lubrication machine magnetic flux main valve mean effective pressure motion motor move multiply number of teeth operation pipe piston plate poles port position pounds pulley pump regulator resistance revolutions revolutions per minute rivets rope rotation screw self-induction shaft shown in Fig side slide valve speed square inch steam pressure stop strength stroke suction switch temperature tensile strength thickness tion tubes turn velocity voltage volts weight wheel wire
Pasajes populares
Página 395 - CALORIE is the amount of heat required to raise the temperature of one kilogram of water one degree centigrade.
Página 402 - The ash pits should be thoroughly cleaned at once after starting. Before the end of the test the fires should be burned low, just as before the start, and the fires cleaned in such a manner as to leave the same amount of fire, and in the same condition, on the grates as at the start.
Página 322 - ... to be Used in the computation. All surfaces below the mean water level which have water on one side and products of combustion on the other are to be considered as water-heating surface, and all surfaces above the mean water level which have steam on one side and products of combustion on the other are to be considered as superheating surface.
Página 403 - The coal should be weighed and delivered to the fireman in equal proportions, each sufficient for not more than one hour's run, and a fresh portion should not be delivered until the previous one has all been fired. The time required to consume each portion should be noted, the time being recorded at the instant of firing the last of each portion.
Página 404 - ... corrected according to the average results of the calorimeter tests. On account of the difficulty of securing accuracy in these tests the greatest care should be taken in the measurements of weights and temperatures. The thermometers should be accurate...
Página 404 - The analysis of the flue gases is an especially valuable method of determining the relative value of different methods of firing, or of different kinds of furnaces. In making these analyses great care should be taken to procure average samples, since the composition is apt to vary at different points of the flue...
Página 401 - ... while the water is in a quiescent state, just before lighting the fire. At the end of the test remove the whole fire...
Página 777 - Divide the number of square inches of belt in contact with the pulley by two, multiply this quotient by velocity of the belt in feet per minute and divide the product by 33,000; the quotient is the number of horse-power.
Página 86 - If the break is in the coil itself, rewinding is generally the only cure. But this may be remedied temporarily by connecting together by wire or solder the two commutator-bars or coil terminals between which the break exists.
Página 403 - ... other boilers, so that in case of a rise in pressure the other boilers may blow off, and the pressure be reduced by closing their dampers, allowing the damper of the boiler being tested to remain