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 642
cates by branch-pipes ff with the inside of the vacuum-box. In the lower part of the pipe G there isa throttle valve S, which closes or opens the communication between the fan and the vacuum-box E ;this valve has a lever g on its spindle, which is connected by a rod h to a long arm i of a lever…
Mechanical engineering
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