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polarity of the current sent into the cable. The middle row engages a star wheel, by which the ribbon is drawn along The second form of automatic transmitter is novel in form and construction. It is the invention of Mr. Charles Cuttriss, and possesses important advantages. A valuable feature is the substitution of indentations in |
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place of perforations in the ribbon. Perforators require constant sharpening and easily get out of order. Indenters never require sharpening, and, being simple in construction, require but little attention. Another important feature is the intermittent motion imparted to the ribbon, by which it is possible to vary the duration of current and earth contacts in any proportion of one to the other. |
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