Hutton, Frederick Remsen, 1853- [from old catalog] · New York, J. Wiley & sons; [etc., etc.] · leaf 650
weight with a long arm, while theeffort of the valve to overcome the weight has but a shortlever-arm. This does away with the inconvenience of a greatweight, and makes adjustment of the pressure to hold thevalve shut both easy and rapid. It is probably the mostwidely prevalent form of safety-valve… … Fig. 494. objection to it that the weight may be so easily increasedby sliding out the regular weight or by hanging other weightsupon the lever. It is also easy to stop the valve from operat-ing by wedging it so that it cannot open under any pressurewhatever. The lever-valve construction lends…
Mechanical engineering · Steam power plants
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