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 142
cause the draught doorto remain closed and the check door open, orso that a certain pressure of steam will operateboth doors automatically. In the constructionof this regulator, usually two castings in form HEATING AND VENTILATION 117 resembling an old-fashioned soup plate arebolted together, with… … Fig. 89. Spring or Pop Safety-Valve.
Architecture · Building
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
