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Automatic Switch Indicator
Patent for an automatic switch indicator. This invention is designed to "prevent accidents resulting from misplaced switches, due to the carelessness of the railroad employees or the inability of the engineer to see the customary track-signals" (line 14-19). Illustrations included.
Date:
October 23, 1906
Creator:
Coffin, Edward F.; Shaw, Carey & Green, Samuel
System:
The Portal to Texas History