Radford's cyclopedia of construction; carpentry, building and architecture. Based on the practical experience of a large staff of experts in actual constrcution work (1909)
Johnson, Alfred Sidney, 1860-, Radford, William A., 1865- · Chicago Radford Architectural Co · leaf 141
Fig. 87. Steam Gauge. gauge as the pressure on the interior tubestraightens it, by this action indicating thepressure carried in pounds. A steam boiler should invariably be fittedwith an automatic damper-regulator, which … Fig. 88. Common Form of Automatic Damper-Regulator. opens or closes its draught doors according tothe pressure of steam on the boiler. This attach-ment may be so set as to cause the draught doorto remain closed and the check door open, orso that a certain pressure of steam will operateboth doors…
Architecture · Building
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