American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 117
operative in the presence of acciden-tal contact of an alternating current circuit since the rapidity of the alternationsprevents the magnet from acting upon its armature. Electko-THERMIC AKEESTER.—An aiTcstcr sliowii in Fig. 72 has recently beendevised to respond to either continuous or… … 7d/as(rumenfy
Telegraph
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