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Johann Stumpf
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21,554. Stumpf, J. Oct. 12. Valves, distributing.-In a steam-engine having exhaust ports h covered and uncovered by the piston in its motion, an auxiliary exhaust valve f opens ports g to the exhaust space i to reduce the back-pressure when the cut-off occurs later than normal. In the form shown, the valve f is carried by the cam-rod d which operates lift admission valves b.
GB190821554D1908-10-121908-10-12Improvements in Steam Engines with Exhaust Ports Controlled by the Piston.
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