Building construction and superintendence, by F.E. Kidder ... (1896)
Kidder, Frank E. (Frank Eugene), 1859-1905 · New York, W.T. Comstock · leaf 515
olve on aball-bearing which re-duces the friction to aminimum. The arrange-ment of the pocket is ex-tremely simple, as theerection consists merelyin setting the box plumband casing it. A clearance space of 10inches over the box abovethe soffit of the opening is necessary for the coiling attachment,… … Fig 506.—Casing of Coil Box, Vertical FlexifoldPartitions.
Building
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