Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 858
It is, however, extremelyexpensive to operate, and in its simple form is somewhat objectionable from the fact that ifa train should leave the main track between any two lilock stations it would be necessary tosend the following train past a block station with a hand signal, for the reason that… … Fig. 4.—The Sykes block signal system. 828 SWITCHES AND SIGNALS, RAILROAD. and the Westinghouse pneumatic signal, both owned and manufactured by the UnionSwitch and Signal Co , and the Hall signal, owned and manufactured by the Hall Signal Co.The Uall Signal is described in Appletonn Cydpfedia of…
Mechanical engineering
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