Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 66
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… … 171C. BELT SHIPPER.—A taper pinwith a flange at the large end and attachedto a pole. This handy device enables thethrowing of a belt off or on with safety. 56 MEASUREMENT OE POWER. J
Mechanical movements
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