Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 984
handle. The rotation of the screw by the milled cylinder shown causes the movement of the jawalong the shank. Fig. 4323 represents a tap-wrench, for holding taps (see Screw-cutting Taps and Dies) during … the cutting of inside threads. The jaws A and B have rectangular notches, which unite to form asquare opening, which may be enlaiged, while always retaining its shape, by the movement of the 950 ZINC FURNACE. adjusting screw shown. Fig. 4324 is another form of tap-wrench, made by the Wiley &…
Mechanical engineering -- Dictionaries
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