Machinery and Processes of the Industrial Arts: And Apparatus of the Exact SciencesU.S. Government Printing Office, 1869 - 669 páginas |
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Página 11
... fact that , for more than ten years , owing to the impossibility of constructing a piston and cylinder steam - tight , the conception of the engine could not be realized in practice . This difficulty had nearly disheartened the inventor ...
... fact that , for more than ten years , owing to the impossibility of constructing a piston and cylinder steam - tight , the conception of the engine could not be realized in practice . This difficulty had nearly disheartened the inventor ...
Página 26
... fact that the supply of the cylinder con- sumes more than half the power developed . To this it may be added , that , while the efficiency of the machine depends upon the difference between the maximum and minimum temperatures , there ...
... fact that the supply of the cylinder con- sumes more than half the power developed . To this it may be added , that , while the efficiency of the machine depends upon the difference between the maximum and minimum temperatures , there ...
Página 27
... fact , when the elastic force of air or steam is employed as a motive power , the maxi- mum limit of possible advantage , and therefore of economy , is easily ascertained , by following the successive changes , in regard to volume and ...
... fact , when the elastic force of air or steam is employed as a motive power , the maxi- mum limit of possible advantage , and therefore of economy , is easily ascertained , by following the successive changes , in regard to volume and ...
Página 33
... fact , in order that the regenerator , sup- pose it for instance to be a succession of wire gauze sheets , should entirely absorb the excess of heat of the escaping air , the number of sheets should be very considerable . It is easily ...
... fact , in order that the regenerator , sup- pose it for instance to be a succession of wire gauze sheets , should entirely absorb the excess of heat of the escaping air , the number of sheets should be very considerable . It is easily ...
Página 35
... fact could not be , since no account was taken of the large amount of heat necessarily transformed into work . But there was a cause of failure superadded to this , arising from the difficulty of heating air at all by means of a furnace ...
... fact could not be , since no account was taken of the large amount of heat necessarily transformed into work . But there was a cause of failure superadded to this , arising from the difficulty of heating air at all by means of a furnace ...
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advantage amount angle apparatus applied armature atmosphere axis Bessemer process boiler calories carried cent centimetres circumference compression construction contrivance crank cubic metres cylinder diameter direction discharge disk distance effect electric employed engine equal exhibited experiments Exposition extremity feet force furnace furnished glass half heat horizontal horse-power hundred hydraulic hydraulic head illustrated inches increased instrument introduced invention inventor iron kilograms kilometres latent heat length lever light light-houses liquid machine manufacture means mechanical ment Messrs metal metres millimetres mode motion movable types movement necessary object observed operation ordinary Paris passes piston plate position pounds practical present pressure prism produced pulley pump purpose refrigerator reservoir revolution roller rotary engine rotation screw sextant shaft side Siemens space spherometer steam steam-engine steel surface telescope temperature tion tonometer tube turbine turn valve vapor velocity vertical vessel weight wheel Wicklow Head
Pasajes populares
Página 31 - B with the sound velocity where y is the ratio of the specific heat at constant pressure to the specific heat at constant volume, and p is the gas pressure.