Engineering reminiscences contributed to "Power" and "American machinist" (1908)
Porter, Charles T. (Charles Talbot), 1826-1910 · New York, J. Wiley · leaf 384
2 PATENT ON PRESSURE PLATE 293 the metal, so that the pressure of the steam on the upper sur-face of the pressure-plate may be relied on for giving to it theabove-described motion, and in employing an adjustable stopto prevent the pressure of the steam from forcing the pressure-plate into too close… … the section being on the line x x of Fig. 2, and Fig. 2 is a longi-tudinal section on the line y y of Fig. 1. The valve A is fitted upon its seat in the steam-chest B, andmoved to and fro over the ports in the usual manner. Theback of the valve is a plane surface, parallel with its face. Alongthe…
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