Barrows, F. W. (Frank Wilson), b. 1853 · New York, N.W. Henley Pub. Co. · leaf 262
ere neck joins body and centreof ball a; this locates the joint between hub and body,as line o p. CHAPTER II. TO LAY OUT A TRUE SPIRAL ON THE SURFACE OF ACYLINDER. For the sake of simplicity the Hne required is to be aspiral of 24 pitch, drawn on the circumference of a cylinder3.82 diameter and 2… … Fig. 123. a piece of cardboard, or if a permanent templet is requireuse a piece of tin or thin brass. Lay it smoothly andtightly on the surface of cylinder as shown in figure, andwith a sharp point mark along each end of cylinder, andmark also the points b and c. Then lay the cardboard 261 262…
Patternmaking
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