National Telegraphic Union · New York : N.T.U. · leaf 368
Vol. IV-No. 44. New York, Saturday, June 27, 1868. Whole No. 102. BENTONS ANTI-TRUNNION TELEGRAPH KEY. The attention of the inventive portion of the telegraphicfraternity seems to have been mainly directed, for sometime past, to the improvement of the transmitting key. … We have already given descriptions in these columns ofseveral different inventions of this kind, and we now pre-sent our readers with another, and a decidedly novelarrangement, quite different from any hitherto broughtout, which is intended to obviate some of the evils causedby the manner in which…
Telegraph
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