Hill, John A. (John Alexander), 1858-1916, Sinclair, Angus, 1841-1919 · New York : American Machinist Pub. Co · leaf 402
nge of action of the valve. On the iTtihof Sept., 1806. Riehar^lson obtained apatent on this device. The engraving on thispage. Fig. 1. shows the valve as it was then made;this engmvfng as well as fig. >2, which showsthe valve as usi-d with relieving lever, was madefrom the original drawing… … Fiff, 1. visions were made on most locomotives topartially unload the valve by hand. At first thought it would s<em as if theway to overcome this dilUculty would be tomake the valves larger, but this made thematter worse instead of better; this arisesfrom Ibe fact that the load, (he springor…
Railroads · Locomotives
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