Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 90
. Fig. 254 is a vertical section of a wooden blast machine ; A, A, are two simple working cyl-inders, in each of the pistons of which there are two valves. On the top of these cylinders there arevalves which lead to the regulator B, in which a piston moves ;hat is connected by an iron… … The whole machine is fastened to substantial timbers, which rest upon a good foundation of hewn stones.These cylinders and the regulator, are from 3^ to 5 feet in diameter, and not often of more than 3 feetstroke. The cylinders are constructed of segments of circles cut out of 1£ inch plank of dry…
Mechanical engineering
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