American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 289
ain,correspond to the pole-changers and transmitters used here in battery-key systemsexcept that they are operated manually by the Morse operator. The reversing keyKK is shown in end view for clearness ; the increment key IK in side view ; thenecessary contact points being carried on the end of the… … middle as outlined, e is connected to earth and L to line. It will be seen that asthe lever I of rk is opened and closed, the entire battery b b, or the short end bonly, will be rever.-^ed, depending upon the position of the increment key ik. AVhenIK is open, as in the figure, only the small end of…
Telegraph
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