American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 391
t the station as a prolonged buzz when the key or trans-mitter K is closed, but, when that key is opened, the buzz ceases, as, at such times, thesecondary coil is open. Thus, by opening and closing the key k, long and short noisescorresponding to the dot and dash of the Morse alphabet, may be… … e^ ^^ _j—-_-__^^ X^ f- Yir 1: i ii 1 i 1 -^ \ j n iSST
Telegraph
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