American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 448
hes forward the extension F, thereby removing the left end of lever l from the path of the rotating arm p, which at once releases the clock-work. It will be under-stood that as long as signals follow each other in quick succession the extension, n, will continue to strike against f, thereby keeping… … MULTIPLE CALL BOX. MULTIPLE CALL BOXES. When it is desired to furnish a subscriber witli more than simple messenger ser- 374 AMERICAN TELEGRAPHY. FIG. 287.
Telegraph
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