Benjamin, Charles Henry, 1856- [from old catalog], Hoffman, James David, 1868- [from old catalog] joint author · New York, H. Holt and company · leaf 167
s evident that the tangent PQ to the curveis a constant and = r^ Also -^—p, = r.. sino 148 MACHINE DESIGN Let a pivot be generated by revolving the curve around itsaxis SL. As in the case of the conical pivot it can be provedthat the normal pressure on an element of convex surface is ip_ SWrdr… … wear proportional to But IS Fig. 62. dP = dT = sind sind a constant, therefore the vertical wearwill be the same at all points. Thisis the characteristic feature and advan-tage of this form of pivot.As shown in equation (a) SWr^drdf^JSWfVj^ rdr and T= dl —d 8TF/ri Wfd, (85) dl-dl 2 2 T is thus…
Machine design
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