. Popular electricity magazine in plain English. Iry.—J. R. 1346 POPULAR ELECTRICITY and the WORLDS ADVANCE ELECTRIC SIGNALS IN SKYSCRAPERCONSTRUCTION In the construction of the Municipal Buildingin New York, a system of electric signaling hasbeen used, of deep interest to construction engi-. Button Blocks, Siren Horns and Lamps neers. It seems to do away with all uncertaintywith regard to signals and is regarded by many asa long step in the safety first movement. This system comprises five essential parts, i. e.,the button block; the electric cable; the signalbox; the recorder and the safety
. Popular electricity magazine in plain English. Iry.—J. R. 1346 POPULAR ELECTRICITY and the WORLDS ADVANCE ELECTRIC SIGNALS IN SKYSCRAPERCONSTRUCTION In the construction of the Municipal Buildingin New York, a system of electric signaling hasbeen used, of deep interest to construction engi-. Button Blocks, Siren Horns and Lamps neers. It seems to do away with all uncertaintywith regard to signals and is regarded by many asa long step in the safety first movement. This system comprises five essential parts, i. e.,the button block; the electric cable; the signalbox; the recorder and the safety device. Thebutton block is either a pear shaped block or arectangular one, fastened to a belt and wornaround the waist of the signal man. This blockcontains a series of seven signals. The first three
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectelectri, bookyear1912
