Hutton, Frederick Remsen, 1853- [from old catalog] · New York, J. Wiley & sons; [etc., etc.] · leaf 586
the gasesthrough it, which checks the flow of air through the fire. It is usually made in one of two forms. The sliding orguillotine damper is a flat plate sliding in grooves across aframe in the flue (Fig. 436). The pivoted or balanced dam-per is a plate mounted upon an axis through its centre of… … Fig. 465•usually is the harder to move, and if it slides vertically has tobe counterweighted in order to be balanced. The other formis in equilibrium in any position. The damper is oftenarranged not to close entirely even when it is nominally shut,in order that there may still be a tendency for a…
Mechanical engineering · Steam power plants
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