Mechanical jack's
Steam era signaling about as close to 1890's technology as one could get and used at interlockings around the U.S. but popular with the New Haven railroad during the 1930's .
Two locations in Massachusetts Framingham center and Walpole signals just like these but updated with electric lamps were still being used up to 1983.
In 1984 new signaling made by modern industries and up grading railroad programs stripped the state of any remaining signals of antiquity .
Mechanical jack's
Steam era signaling about as close to 1890's technology as one could get and used at interlockings around the U.S. but popular with the New Haven railroad during the 1930's .
Two locations in Massachusetts Framingham center and Walpole signals just like these but updated with electric lamps were still being used up to 1983.
In 1984 new signaling made by modern industries and up grading railroad programs stripped the state of any remaining signals of antiquity .