Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 187
, A, to the nose piece, and slid ing this in V grooves in a bos att he back <>t the body. A horizontalmicrometer screw with a milledhead, K, acts on a vertical bentlexer, D, on which a stud, E, fixedto the prism bar bean. There is also an adjust tnent tor Fig. 124.— Swifts patent fine… … FINE ADJUSTMENTS enables wear and tear to be compensated. It is obvious that tin-slowness of the motion is here controlled by three factors : (1) thelength of the lever, D; (2) the distance of the lifting-stud, E, fromthe pivot or fulcrum ; and the pitch of the screw-thread on F. Manifestly, where…
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