Mechanical movements, powers, devices and appliances (1901)
Hiscox, Gardner Dexter, 1822?-1908 · New York, N. W. Henley & company · leaf 308
1205. DRILL FOR CURVEDHOLES, used in coal mining. Thedrill is on the end of a curved tube, andis driven by a flexible shaft. The tubeis fed forward by a pivoted arm andworm gear. … 1206. BOX-WING BLOWER.—The dis-charge openings of the disc are rectangular,with the sides enclosed. Made of sheet metal.
Mechanical movements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
