American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 103
is also intended for those who mayhave writers cramp, or who may not be expert senders. This transmitter isshown in front view in Fig. 57, in which r indicates the rudder-shaped pieces ofmetal. H is the cylinder. THE YETMAIs^ KEYBOARD TEAKSMITTER. This modification and improvement of the La Dow… … DOUBLE ACTION-KEY. of the La Dow transmitter, the mechanism of the Yetman transmitter is so arrangedthat the depression of a key transmits the complete Morse letter. In the latest typeof the Yetman keyboard transmitter it is combined with an ordinary typewriter sothat the one keyboard serves as a…
Telegraph
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