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Henry James Martin
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17,076. Martin, H. J. Aug. 14. Pistons.-In the piston packing described in Specification No. 500, A.D. 1869, the doublebeat valve admitting steam behind the packing is replaced by a solid plug b, and the inner expanding ring f is formed with peripheral flanges e, e'. The steam is admitted to the space d at the back of the packing through ports a, a<1>, c, c' controlled by the plug b.
GB190817076D1908-08-141908-08-14Improvements in Tightening Piston Rings
ExpiredGB190817076A
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