Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 487
by means of a short level with twclegs passing down from the edge of the beam. The lengths from the main centre are next ascertainedto be right, and the main centre is then put in, using the end centres as points to measure from.Finally, the keys are fitted. This is the mode of procedure when the… … done. The force acting at eachend of an engine-beam may betaken at 14 pounds per circularinch of the piston, or, if thebeam be supposed to be sup-ported at both ends, it may betaken at 28 pounds per circularinch acting at the centre. Thedepth of the beam at the endsbeing one third of the depthat…
Mechanical engineering · Mechanics · Engineering
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