Railroad Signal Lights, Detroit, Toledo & Ironton Railroad, February 1927
Add to SetSummary
The DT&I controlled train movements with an automatic block signaling system. The railroad line was sectioned into blocks. An electrical circuit in the track detected if a train was in a given block, or if the track was clear. The circuit then operated semaphore signals, like this one, that instructed an engineer how to proceed depending on the blade's position.
The DT&I controlled train movements with an automatic block signaling system. The railroad line was sectioned into blocks. An electrical circuit in the track detected if a train was in a given block, or if the track was clear. The circuit then operated semaphore signals, like this one, that instructed an engineer how to proceed depending on the blade's position.
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.833.48455
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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