American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 535
a full move-ment, and consequently the paper tube is not advanced, but when the letter is printedand the armature R of m is retracted, the paper is then fed. In the operation of receiving messages by this system, the attendant places thetelegraph blank in its tubular form over its support « until… … the end of the address, and at the end of the message, a double or line space is pro-vided in the perforated strip at the transmitting end. At these intervals the atten-dant operates the manual device m by the knob a, and advances the paper tube oneline. It is essential at such times that means be…
Telegraph
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