Mechanical movements, powers, devices and appliances; (1903)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The N.W. Henley & co. · leaf 38
30 TRANSMISSION OF POWER. ^L V^^ 1 7^ 55. ROPE SPROCKET WHEEL, several modi-fications of which are in use in old-style hoists. L m 3 56. r-GROOVED ROPE PULLEY, havingcorrugated groove faces to increase the adhesion ofthe rope.
Mechanical movements
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