Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 468
Fig. 1061. Fig. 1062. of the gate is H thick, the ribs 6 deep, the gate-stems 2^ diameter. Thenuts by which the gates are raised are geared together, and actuated by adouble crank. The gates and guides are faced with brass, about -^ thick. Similar gates are very common, plates of casf-iron…
Mechanical drawing
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