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Τι (ποιος) είναι wigwag$91950$ - ορισμός
Wigwag (railroad)
![Arrow commuter rail service]].](https://commons.wikimedia.org/wiki/Special:FilePath/Dan redlands wigwag.jpg?width=200 "Arrow commuter rail service]].")
![Advertisement for the [[Hall Signal Company]], 1916](https://commons.wikimedia.org/wiki/Special:FilePath/Hall wigwag signal ad 1916.jpg?width=200 "Advertisement for the [[Hall Signal Company]], 1916")
!["Peach basket" variation primarily found on the Union Pacific, pictured in August 1999. This particular signal is operational and guards the main crossing of the [[Orange Empire Railway Museum]]](https://commons.wikimedia.org/wiki/Special:FilePath/Oerm peach basket.jpg?width=200 "\"Peach basket\" variation primarily found on the Union Pacific, pictured in August 1999. This particular signal is operational and guards the main crossing of the [[Orange Empire Railway Museum]]")
![Chicago & North Western]] in downtown [[Ames, Iowa]], September 1971. Signals were replaced by more modern devices in 1973.](https://commons.wikimedia.org/wiki/Special:FilePath/WRRS Autoflag 5 wigwag in Ames, IA.jpg?width=200 "Chicago & North Western]] in downtown [[Ames, Iowa]], September 1971. Signals were replaced by more modern devices in 1973.")
RAILROAD GRADE CROSSING SIGNAL
Magnetic Flagman; Wig wag (train); Wig wag (train).; Wig wag (crossing); Wig-wag (crossing)
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 the approach of a train. 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 safer railroad grade crossings.
![Albert J. Myer (center) during the [[Peninsula campaign]] (1862)<ref>Raines, p. 24</ref> of the American Civil War](https://commons.wikimedia.org/wiki/Special:FilePath/Albert J Myer in the field during American Civil War.png?width=200 "Albert J. Myer (center) during the [[Peninsula campaign]] (1862)<ref>Raines, p. 24</ref> of the American Civil War")
.jpg?width=200 "US Army Signal Corp insignia featuring crossed wigwag flags and torch")
![Elk Ridge]], Maryland, during the [[Battle of Antietam]]](https://commons.wikimedia.org/wiki/Special:FilePath/Signal station Elk Mountain.jpg?width=200 "Elk Ridge]], Maryland, during the [[Battle of Antietam]]")
 (14782789933).jpg?width=200 "The Cobb's Hill wigwag tower, 1864")
![A Union [[cipher disk]]](https://commons.wikimedia.org/wiki/Special:FilePath/UnionCipherDisk.nsa.jpg?width=200 "A Union [[cipher disk]]")
![Richmond]]Myer (1868), frontispiece](https://commons.wikimedia.org/wiki/Special:FilePath/Wigwag 130 ft tower.png?width=200 "Richmond]]Myer (1868), frontispiece")
![Wigwag station in a tree on the [[Upper Potomac River]]Myer (1872), frontispiece](https://commons.wikimedia.org/wiki/Special:FilePath/Wigwag tree station, upper Potomac.png?width=200 "Wigwag station in a tree on the [[Upper Potomac River]]Myer (1872), frontispiece")
Wigwag (flag signals)
METHOD OF FLAG SIGNALING
Wigwagging; Wig-Wag Signaling
Wigwag (more formally, aerial telegraphy) is an historical form of flag signaling that passes messages by waving a single flag. It differs from flag semaphore in that it uses one flag rather than two, and the symbols for each letter are represented by the motion of the flag rather than its position.
