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 522
of thelever, which is done by the same handle : the lead is regulated by the degree of inclination of the par-allelogram, which might be changed by lengthening the lever on the reversing-shaft connected with thelower arm of the link, or by shifting it round on the shaft so as to throw the lower arm… … C<t;§=&=a?. Variable expansive action has recently been extensively introduced in locomotives, and the whole ofthe various expedients for its accomplishment operate either by altering the travel of the valve, or bythe introduction of superposed valves. The first mode is that adapted by…
Mechanical engineering · Mechanics · Engineering
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