American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 428
uit is broken 29 times, but at the fifty-eighth second it is notbroken. This indicates that the first beat after the pause is the beginning of the nextmiinite. The w^ieel hw is so geared as to make one revolution every five miinites. Itsperiphery is notclied for a distance equal to one-fifteenth of… … arrives at a certain point in its revolution the flat spring s drops into it. This com-pletes, at s, a circuit through the relay. Hence so long as the spring s remains in thenotch the second-hand wheel w cannot open the relay circuit. The notch on hw is soarranged that it arrives at the point…
Telegraph
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