The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 250
ying distinctly. On a cylindersix inches diameter, about one hundred letters might be written ina line, and that would amount to more than four hundred lettersper minute, with a single wire. In consequence of this rapidity ofaction, the patentee says that the copying telegraph affords pecu-liar… … The annexed woodcut (Fig. 1) represents a plan of the copyinginstrument. I, I, represent the frame containing the train ofwheels for giving motion to the cylinder C; D, the drum fromwhich the weight is suspended; and F, the fan which prevents ac-celeration. S, tlie screw on which the nut, N,…
Architecture · Civil engineering · Science
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![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-1043-467.webp)
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