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Improvements in valve mechanism for controlling the admission of steam to and from steam engine cylinders
Improvements in valve mechanism for controlling the admission of steam to and from steam engine cylinders
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机译:阀机构的改进,用于控制进汽缸和进汽缸的进汽
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145,379. Patchett, W., and Stafford, W. March 1, 1920. Addition to 139,134. Exhaust pipes. - A non-return valve s is placed in each exhaust-pipe r so that the exhaust from one valve does not cause back-pressure on the other.
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