Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 223
me of steam, and there are gains of effect bycutting off the introduction of steam to the cylinder at some point of a partial stroke,which is completed ,by the expansion of the inclosed steam, but with a constantly di-minishing pressure. Under expansion, the volume of a confined gas is inversely… … Fig. 405. To determine the action of the steam within a steam-engine cylinder, an indicator isused. It consists of a small cylinder connected by a steam pipe with the main cylinder,with its piston controlled by a graduated spring, and recording by a pencil the varyingpressures in the main cylinder…
Mechanical drawing
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