Railroad Signal Lights, Detroit, Toledo & Ironton Railroad, February 1927
Add to SetSummary
Traffic on many railroads is controlled by an automatic block signaling system. A railroad line is sectioned into blocks, and an electrical circuit in the track detects whether a train is in a given block. The circuit then operates differently colored signal lights, like these, that instruct an engineer how to proceed -- similar to an automobile traffic light.
Traffic on many railroads is controlled by an automatic block signaling system. A railroad line is sectioned into blocks, and an electrical circuit in the track detects whether a train is in a given block. The circuit then operates differently colored signal lights, like these, that instruct an engineer how to proceed -- similar to an automobile traffic light.
Artifact
Photographic print
Date Made
08 February 1927
Subject Date
08 February 1927
Keywords
Collection Title
On Exhibit
By Request in the Benson Ford Research Center
Object ID
64.167.548.P.833.48456
Credit
From the Collections of The Henry Ford. Gift of Ford Motor Company.
Material
Paper (Fiber product)
Linen (Material)
Technique
Gelatin silver process
Color
Black-and-white (Colors)
Dimensions
Height: 7.875 in (book)
Width: 11.25 in (book)
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