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James Macara Christie
Richard Rock
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21,757. Christie, J. M., and Rock, R. Oct. 15. Drawings to Specification. Steam pumps. - Relates to valves for the cylinders of piston-pump &c. engines. The main valve is hollow, and has four pistons.-a small one which is always subjected to steam pressure and a large one which is acted upon by exhaust or steam pressure according to the position of a secondary valve having three pistons and operated by the engine piston.
GB189821757D1898-10-151898-10-15Improvements in Cylinder Valves for Direct Acting Fluid Pressure Engines and Pumps.
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