Mechanical movements, powers, devices and appliances; (1903)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The N.W. Henley & co. · leaf 308
thrown by aported sector,moved by im-pact with therecessed shoul- ders on the piston. Sergeant model. MINING. 299 … 1203. COAL-CUTTING MACHINE, IngersoU-Sergeantmodel. The piston and drill rod are automatically operated by thealternating motion of two piston valves. Operated by compressedair, and only has to be held against the coal wall to under-cut, whenthe face can be broken down.
Mechanical movements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
