Motive Powers and Their Practical SelectionLongmans, Green, and Company, 1894 - 257 páginas |
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Página 18
... tions of power of electric energy , it is always necessary to bear in mind those losses which occur in all mechanism , due to friction , imperfections , and leakage . Thus , 10 effective horse - power employed to rotate 18 MOTIVE POWERS .
... tions of power of electric energy , it is always necessary to bear in mind those losses which occur in all mechanism , due to friction , imperfections , and leakage . Thus , 10 effective horse - power employed to rotate 18 MOTIVE POWERS .
Página 21
... necessary . The 11 per cent . is added to the result of the calculation to cover friction in the pumps and the pipes . A very good water lifter for human power is the " Noria , " which consists of an endless chain provided with buckets ...
... necessary . The 11 per cent . is added to the result of the calculation to cover friction in the pumps and the pipes . A very good water lifter for human power is the " Noria , " which consists of an endless chain provided with buckets ...
Página 24
... necessary to have extra multi- plying gear added , which increase the speed of the shaft to a proportionate extent . This multiplying gear is usually car- ried in a separate frame , but new designs are now arranged to carry the whole in ...
... necessary to have extra multi- plying gear added , which increase the speed of the shaft to a proportionate extent . This multiplying gear is usually car- ried in a separate frame , but new designs are now arranged to carry the whole in ...
Página 28
... necessary mechanism to make use of it . Constituent Features of Air.— Air is of unlimited compressibility and elasticity . Its elastic force is in direct proportion to the space it oc- cupies . A cubic foot at atmospheric pressure ...
... necessary mechanism to make use of it . Constituent Features of Air.— Air is of unlimited compressibility and elasticity . Its elastic force is in direct proportion to the space it oc- cupies . A cubic foot at atmospheric pressure ...
Página 38
... necessary . All the text - books give rules in the misleading form of theoretical results . The above rule makes allowance for the loss of work in the wheel or motor . Low falls are sometimes stated in pounds pressure per These are ...
... necessary . All the text - books give rules in the misleading form of theoretical results . The above rule makes allowance for the loss of work in the wheel or motor . Low falls are sometimes stated in pounds pressure per These are ...
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amount ampères apparatus arranged B.Sc calculation cast-iron cent CHAPTER Chemistry chimney coal compound engine condensation Cornish boilers cost crank Crown 8vo cubic feet cubic foot cylinder Diagrams Diam driving dynamo economy effective horse-power electric Elementary fall feed-water feet per minute flues ft.-lbs fuel furnace gas-engine gine grate area Heads in Feet heating surface HORIZONTAL ENGINES horse-power per hour horses Illustrations imperial gallons inch diameter indicated horse-power iron length LL.D Load machine machinery Maximum mill motive power motor nominal horse-power oil-engine oxen Pelton Wheel pipes piston plates portable pounds practical proportions published by Longmans pump Revolutions per Minute Science Scientific Works published shaft speed square feet square foot square inch steam-engine Strength of Materials Stroke supply thickness tions tubes turbine valve vaporizer velocity vertical engine volts water-wheels Watts weight wheel wind windmill Woodcuts ΙΟ
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