Ludy, Llewellyn V., 1875- [from old catalog], American Technical Society · Chicago, American technical society · leaf 48
t of one indicationfrom one side of the engine piston, say the head end side. Thediagram for the crank end would be quite similar, but reversed inposition on the paper. The reference lines are the atmosphere line A B, boiler pressureline Y K, clearance line 0 Y, and the vacuum or absolute… … Fig. 35. Typical Indicator Card uring all pressures, it should be carefully located. The vacuum orabsolute pressure line OX, the zero line of pressure, is drawn byhand below and parallel to the atmosphere line a distance by scaleequal to the barometric pressure, which at sea level is 14.7 poundsper…
Indicators for steam-engines · Steam-engines
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