Natural philosophy. including statics, hydrostatics, pneumatics, dynamics, hydrodynamics, the general theory of undulations, the science of sound, the mechanical theory of music, etc. : designed for the use of normal and grammar schools, and the higher classes in common schools (1861)
Sangster, John Herbert, 1831-1904 · Montreal : J. Lovell · leaf 47
the two screws. For instance, in Fig. 14, the part B works within the part A. Xow, if Bhave a pitch of -^^th of an inch and A a pitch of J^, then at each revolu-tion of the handle the weight will be raised tlirough -jL—jL.—.^_^ of aninch, and the whole instrument has the same mechanical efiect as a… … Hence P = Wxd 1X2 X3-1416 and W=z -PX/X2X3-1416 .lET. 131.] THE ENDLESS SCREW. 45 Example 101.—What power will exert a pressure of 20000 lbs,by means of a diflferential screw having a power lever 50 inchesin length, the exterior screw a pitch of -f^ of an inch, and theinner screw a pitch of ^^th of…
Physics
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