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Wigwag is a nickname for a type of railroad grade crossing signal once common in North America, referring to its pendulum-like motion that signaled a train's approach. The device is generally credited to Albert Hunt , a mechanical engineer at Southern California 's Pacific Electric (PE) interurban streetcar railroad, who invented it in 1909 for ...
A special symbol in the center indicates an electric railroad crossing, cautioning road users about excessive height cargo that may contact the electric wires. In Australia, the crossbuck is a St Andrews Cross as in Europe, but uses words and the same color as the American crossbuck.
The Magnetic Signal Company was an American company based in Los Angeles, California, focused on railway signalling.The company was the manufacturer of the ubiquitous "Magnetic Flagman" wigwag railroad crossing (or level crossing) signal, seen all over California and the western states.
"Railroad Accessories Corporation" (RACO) merged with Griswold Signal Company in 1964. Manufacturing of crossing signals continued in Minneapolis. In 1971, RACO and Marquardt Industrial Products merged to form Safetran. Management, sales, and manufacture of crossing signals continued in Minneapolis until 2000, when the division moved to Kentucky.
It was installed in the mid-1930s by inventor Alonzo Billups over growing concern due to numerous accidents at the crossing involving trains and motor vehicles. Like nothing before, the Billups signal was a large gantry spanning the highway and was likely the first such use of a gantry-style crossing of the type now in relatively common use.
US&S position light signal, 1922 US&S built the first power interlocking system in the United States, a pneumatic design, in 1882 at East St. Louis, Illinois . Within several years the company developed an electro-pneumatic system, which was widely adopted by railroads across the country.
“Here is a perfect example,” the investigator said, “of the gigantic ripoff that is occurring with these railroad crossing upgrades all over the U.S. They are grossly misusing our federal ...
A Pennsylvania Railroad high signal displaying Approach Medium Amtrak colorized position lights at Trenton, New Jersey. Position light signals use rows of 5 + 3 ⁄ 8-inch-diameter (140 mm) lamps to simulate the positions of an upper quadrant semaphore blade.