. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. nct notes, which may be in harmony, or discord, and whensounded together may be heard a long distance. It is important that the whistle shall sound as soon as thesteam is turned on; to ensure this great care must be taken tokeep the whistle-pipe free from water. Maxims and Instructions. i8i THE STEAM GAUGE. The principle of construction of the dial steam gauge is,that the pressure may be indicated by means of a pointer in adivided dial similar to a clock face, but marked in d
. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. nct notes, which may be in harmony, or discord, and whensounded together may be heard a long distance. It is important that the whistle shall sound as soon as thesteam is turned on; to ensure this great care must be taken tokeep the whistle-pipe free from water. Maxims and Instructions. i8i THE STEAM GAUGE. The principle of construction of the dial steam gauge is,that the pressure may be indicated by means of a pointer in adivided dial similar to a clock face, but marked in division,indicatmg pounds pressure per square inch instead of hoursand minutes. Figs. 87 and S show the ordinary style of gauge wliich con-sists of an elliptical tube, connected at oae end to a steam pipein communication with the boiler pressure and at the otherend with gearing to a pointer spindle as shown m cut. An inverted syphon pipe is usually formed under the gauge,its object being to contain water and thus prevent the heat ofthe steam injuring the machinery of the gauge, or distortingits action by Fig. 87. Fig. 86. A small drain cock should be fitted to theleg of the syphon of a steam gauge, leadingto the boiler, at a level with the highestpoint the water can rise in the other leg,otherwise an increased pressure will be indi-cated, due to the head of water which wouldotherwise collect in the boiler leg of thesyphon. Fig. 89. Steam gauges indicate the pressure of steam
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsteamen, bookyear1917
