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Mechanical movements, powers, devices and appliances; (1903)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The N.W. Henley & co. · leaf 238
88;^. SAWMILL FEED.—By the revolu-tion or rocking of the crank ^, the adjustablebell-crank lever a is vibrated, which gives thehook pawl c the desired motion to turn theratchet wheel and pinion which, meshing inthe log bed-rack, feeds the log to the saw. Therate of feed is adjusted by the screw… … 884. RACK MOTION used for air pumps.The racks are directly connected with the pis-tons of a single-acting air or other pump, andoperated by a brake lever. 885. AIR-PUMP MOVEMENT.—Two racksconnected directly with the pistons, with guides,are operated by a pinion and lever. 23© GEARING.Mechanical movements
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