Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary (1917)
Hiscox, Gardner Dexter, 1822?-1908 · New York : The Norman W. Henley publishing co. · leaf 60
ted 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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