Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 138
ce through which the handle moves will be about 4 1 inches, and for one tthe wheel the handle must pass through 5 X 44 =220. The wheel carries a pinion of. say, 3 Iof a pitch of \ of an inch, working the rack that carries the weight; one turn of the pinion will, there-fore, raise the rack one inch,… … 132 JACK, TRAVERSING SCREW. JACK, TRAVERSING SCREW. Figs. 2415and 2416 exhibit a side view and plan of thescrew modification. The screw-jack A is boltedto the plank C; at the other end of the plank isfixed the rack G, in which the toe of the strut Fadvances as the screw B is elevated; the…
Mechanical engineering
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