Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 50
^ … no. FRICTION GEAR, with variable speed bytraversing a pulley to or from the centre of the faceof a disc wheel. Leather or rubber facing for wheeland pulley makes best working condition. III. VARIABLE SPEED GEAR forsewing-machines, Wrights model.The upper shaft is the driver, the lowershaft carrying…
Mechanical movements
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