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Mechanical laboratory methods; a testing of instruments and machines in the mechanical engineering laboratory and in practice (1918)

Smallwood, Julian Chase · New York, D. Van Nostrand company · leaf 49

An illustration from Mechanical laboratory methods; a testing of instruments and machines in the mechanical engineering laboratory and in practice, 1918, leaf 49 — Fig. 14.—Mechanism ofPressure Rec:rder. 4. Draft Gage Calibration Principles. Draft gages are generally special forms of manom-eters used to measure the reduced pressure (less than atmosphere)in chimne3^s, which creates the draft. This is expressed in inchesof water and, as it is usually only a few… … 28 SCALES AND PRESSURE GAGES 4 U-tube will not do. Fig. 15 shows a favored type. It is the ordi-nary manometer with one leg on a slant, so that the travel of ther-r _<---yn level of the liquid used is magnified. In use, the instrument should be settrue to its designed level and thehquid adjusted…

Mechanical engineering laboratories

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