Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 66
171a. THE ST. JOHNS STEAMMETER.—An automatic recordingmeter of the amount of steam passingthrough it for all purposes. The Hft-ing of a conical valve by differentialpressure operates a marking indexthrough the lever on a small transfershaft through the projecting arm fromthe cylinder. See detailed… … 171&. DETAILS OF THE ST.JOHNS STEAM METER.—Thelifting of the conical valve by differ-ential pressure allows the requiredquantity of steam to pass through theannular area, which is the measure un-der the initial pressure. The valvelift is recorded on a strip of papermoved by a clock; the mean of…
Mechanical movements
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