American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 620
heavy traffic. Thesame battery is utilized for the catch magnets. The Hall Company have recently utilized gasat a pressure of 700 pounds, contained in a cylin-der placed beside the signal pole, to operate theblades in place of the pneumatic pressuie de-scribed. The pressure is reduced to forty or… … MILLER CAB SIGNAL SYSTEM. This is a system by which when two trains are within a certain prearranc^eddistance of each other a red incandescent lamp is automatically lighted in the cab ofthe rear engine. The electrical circuits, etc., for this system are shown in Fio-. -82/^;.Track batteries h h,…
Telegraph
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