Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 311
tion of the steeltubular masts, the successive stages of erection being shown in Figs. 311, 312, 313, 314 and315. The mast is made up of steel cylinders (Fig. 311), constructed in quarter sections,flanged vertically and horizontally and secured together by bolts stayed with steel cables.These stand… … Fig. 311—Showing Steel Semi-Cylinders forthe Marconi Tubular Mast. the steel cylinders. The hoisting arms attachedto the upper end were fitted with blocks andhoisting cables. Attached to these arms werechain hoists supporting a square wooden cage(Fig. 312) for the workmen, which was loweredor…
Telegraph, Wireless
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