Machine design; a manual of practical instruction in designing machinery for specific purposes, including specifications for belts, screws, pins, gears, etc., and many working hints as to operation and care of machines (1918)
Wallace, Ernest L · Chicago, American technical society · leaf 25
rm in feet, the momentis in foot-pounds; if the force is expressed in pounds and its arm ininches, the moment is in inch-pounds. A sign is given to the moment of a force for convenience. Therule used herein is as follows: The moment of a force about a pointis positive or negative according as it… … *By clockwise direction is meant that in which the hands of a clock rotate; and bycounter-clock wise, the opposite direction. MACHINE DESIGN 15 Principle of Moments. If a line or point in a body is taken asan axis about which the body may be considered as tending to rotate,then the sum of the…
Machine design
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