Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 612
spindles may be driven in either direction independently of each other, and may be employedat the same time to screw-bolts and mils of different sizes and pitches of thread. SCREWING MACHINE, DOUBLE. G05 The Bcrewing-spindles are of malleable iron to insure strength, an 1 arbolts to pass into them… … but that for the larger spin! v. ill 1, ■ obs< rve 1 from the face view of it given in Fig. S287. This consists of a strong plate W, annularis recessed to n ceive a ring X, flushwith its exterior surface. Th • ring X has a portion <>f its circumference cut. into teeth to geer with aworm…
Mechanical engineering
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