A text book of elementary mechanics, for the use of colleges and schools (1881)
Dana, Edward Salisbury, 1849-1935 · New York, J. Wiley & sons · leaf 269
larger screw will descenda distance equal to the distance between its threads (p),and the smaller screw will ascend the distance betweenits threads (p); hence the difference of these two willrepresent the distance through which weight is raised(or resistance moved). P_ _ h p-pW ~~~~ s Z %7tR~ The… … Fig. 187 an endless screiv. Here there is a cylinder with a uni-form thread fitting into the teeth of a toothed wheel.The number of threads in the screw of the cylinder AB 243.] SCREW. 251 will determine the number of teeth of the wheel C,which will be advanced in one revolution of the former.Upon…
Mechanics
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