American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 102
that of a typewriter. One key is shown at c. Each key is pivoted at theright hand end, as shown at c. It is held in its normal position by spring c^ Nearthe center of each key is attached a rudder-shaped, thin piece of metal f, having por-tions of its lower edge insulated, as shown by the thick… … letters of the Morse alphabet. The insulated portion a^ is directly over a metal cyl-inder H which extends under all of the keys, and which cylinder, when in use, iskept in constant rotation by a suitable spring or motor shown at the right of Fig. 5 7.A flat metal spring, or brush k, rests on the…
Telegraph
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