Millikan, Robert Andrews, Gale, Henry Gordon · Boston : Ginn and Co. · leaf 142
119 Let the student show from tlie principle of work, namely Es — Rs, that the mechanical advantage, that is, —, of such a device is circum. of a no. coos in d no. cogs in / X 5 X ^—__i£.. circum. of e no. cogs in c no. cogs m a (8) 140. The worm wheel. Another device of high mechanical advantageis… … Fig. 134. Train of gearAvheels Fk: 135. The wormo-ear This device is usedmost frequently whenthe primary object is todecrease speed rather than to multiply force. It will be seen that thecrank handle must make n turns while the cogwheel is making one. Theworm-gear drive is generally used in the…
Physics
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