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Title: |
1895 Article-B. W. Payne & Son Co., Corliss Steam Engine |
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Source: |
Modern Mechanism 1895 pg 314-315 |
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Insert Date: |
6/11/2011 5:24:00 PM |
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The Payne-Corliss Engine.—In the engine illustrated in Fig. 50 separate valves have been provided for the induction and exhaust; the steam-chest and induction-valves situated above, and the exhaust-chest and valves below, as in the conventional Corliss engine. There are, however, separate wrist-plates for the steam and exhaust valves. The wrist-plate, which gives motion to the exhaust-valves, derives its movement from a fixed eccentric upon the main shaft, and thus the points of release and compression may be adjusted without interfering with the functions of the steam-valve, and, once determined, are positive and fixed. The eccentric, which determines the movement of the steam-valves, is operated by a shaft-governor in such a manner as to open t he valves more or less according to the amount of steam required, varying the point of cut-off, while the amount of lead remains practically constant for all loads and pressures. The point of cut-off being varied by the greater or less movement of the wrist-plate instead of by means of a detachable motion, and the valves being closed by a positive connection with the wrist-plate instead of by dash-pots, high rates of rotation and the advantages of the high-speed engine, combined with a distribution of steam to which the economy of the 4-valve engine is due, are rendered possible, inasmuch as the engine is not limited by the inability of the detachable devices to act at high rotative speeds. |
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1895 B. W. Payne & Son Co., Corliss Steam Engine
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