National Telegraphic Union · New York : N.T.U. · leaf 277
PATENT AXTI-IKrXXIOS KEY, WITH ECCE>TKIO CIRCUIT CLOSEB. They above KEY has recently been patented, and is believed tobe the best form of Key yet presented for adoption and use byTelegraph Companies or Operators. … PATENT ANTI-TRUNNION KEY, WITH AUTOMATIC CrSCUIT CLO*EK. This cut represents the Anti-Trunnion Key, with an AutomaticCircuit Closer. Ey the use of this Key an absolute certainty ofexemption from accidental opening of circuit, either throughcarelessness or otherwise, at the Key, is secured. We would…
Telegraph
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![An illustration from The Telegrapher [microform], 1864, leaf 277](https://img.insideoutlibrary.com/img/1024/ia-telegrapher05nati-277-179.webp)
