National Telegraphic Union · New York : N.T.U. · leaf 92
IWilASD tua PATENT ANTI-TEUNNION KEY, WITH ECCENTRIC CIRCUIT CLOSER. 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-TKTJNION KEY, WITH AUTOMATIC CIRCUIT CLOSER. This cut represents the Anti-Trunnion Key, with an AutomaticCircuit Closer. By 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 92](https://img.insideoutlibrary.com/img/1024/ia-telegrapher05nati-92-45.webp)
