Five-watt, ten-volt bulb in signal lamp with reflector gives daylight indication up to 5000 ft.; approach lighting is accomplished in different ways; track is curved throughout greater portion of recent installation so that spread-light cover glass lenses were required.
Frisco installs semaphores with color-light indication
Ry. Signaling
Railway Signaling ; 22 , n 1
1929
3 Figs.
Aufsatz (Zeitschrift)
Englisch
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Frisco installs retarding barriers
Engineering Index Backfile | 1938
Frisco installs retarding barriers
Engineering Index Backfile | 1938
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G.N. Replaces Semaphores With color-light signals
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