Mechanical movements, powers, devices and appliances (1901)
Hiscox, Gardner Dexter, 1822?-1908 · New York, N. W. Henley & company · leaf 62
nted with anumber dial and all covered by a perforated plate, showing the topfigures of each dial. The spring pawl checks the first wheel in thetrain, to hold the number in place while the lever pawl takes its backmotion. 164. OPERATION OF A COUNTER.—The wheel B, with its ten pin teeth, isthrown…
Mechanical movements
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