Dunkerley, Stanley, 1870- · London, New York [etc.] Longmans, Green · leaf 410
ons of the contact surfacecut the line PP, whose trace in the longitudinal section is p. Itwill be.seen that there are no real lines of contact corresponding tosections of the worm surface cc and dd by planes CO and DD. Thedotted line didi and cici represent imaginary contact lines fulfillingthe… … 4^0 MECHANISM. The contact surface of the Fig. 437 is typical of the contactsurfaces common to all very steep pitched worms where thehelical angle at the pitch line approaches 45° (the angle in this casebeing 43° to 50°). Certain peculiarities should be noticed. Theuseful or effective portion of…
Machinery, Kinematics of
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