A catechism of the steam engine and its various applications to mines, mills, steam navigation, railways, and agriculture (1876)
Bourne, John, civil engineer. [from old catalog] · New York, D. Appleton and company · leaf 244
Trunk Air Pump. Scaled inch to 1 foot. DISO VALVES FOPw AIR PUMPS. 229 Fi^. 42. … Penns Disc Yalye for Air Pump. Section. Fig. 48. India rubber rings closing on a grating. The trunk in the airpump enables guide rods to be dispensed with. 458. Q.—The air pump, when double acting, has of courseinlet and outlet valves at each end ? A.—Yes; and the general arrangement of the valves…
Steam engineering · Steam-engines
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