How The WigWags Was Made? (Part 2) How The Griswold Rotate Stop Sign Was Made?
3How The Griswold Rotated Stop Sign Railroad Crossing Was Made
The Griswold Signal Company introduced the rotating banner signal in 1927. This signal was a combination of a rotating stop sign and highway flasher that would activate when a train approached. The stop sign would rotate 90 degrees to face traffic, and the signal would also produce red flashing lights and bells.
Griswold rotating banner signals were commonly used in the Midwestern United States, and were also installed in the Western United States. They were mostly used from the 1930s to the 1960s. The last mechanically operable Griswold stop signs were removed in late October 2016, but the signals themselves remain
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How WigWag Was Made?
The wigwag railroad crossing signal was invented in 1909 by Albert Hunt, a mechanical engineer at the Pacific Electric Railway in Southern California. The wigwag was designed to make railroad crossings safer by alerting drivers to an approaching train.
The wigwag's name comes from its pendulum-like motion, which was meant to mimic the swinging of a watchman's lantern. The wigwag was a common sight in the West, and often appeared in early Hollywood movies. The American Railway Association adopted the wigwag as a standard crossing device in 1923. However, wigwags have since been replaced by flashing signals and crossing gates.