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 267
A A, are in one casting. The slide is drawn to and fro by means of the screw, similar to a slide-rest. This screw contains 10 threads to the inch, and has a divided head and pointer to indicate theamount of its revolution. Upon the face of the slide is a click-wheel in one piece with the nose… … upon a stout conical centre-pin firmly attached to the centre of the sliding plate, and is secured bya screw. E is a ratchet kept against the click-wheel by the spring D. The front of the dividing-wheel is commonly divided into 96 parts, of which each sixth division is numbered, and also into…
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