Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 185
tube. The differential-screw mechanism consists <•! a steel rod, V (connected with D), which has two screw threads at the lower end, oneworking in a thread cut in the end of the inner tube, G, and theother in the block, H, which is soldered within the sheath, J.When the milled head is turned to… … Fig. 122. Fig. L28. Schroeders fine adjustment for the Jai b onmodel. FIXE ADJUSTMENTS tively to forty-five and fifty-two threads to the inch, the resultantmotion is equivalent to the difference between the motion of the twoscrews—that is, to the motion of a screw of nearly 33o threads tothe inch.…
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