Trafficators
![](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Trafficator.jpg/220px-Trafficator.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f8/Armstrong_Siddeley_Sapphire_Winker.jpg/220px-Armstrong_Siddeley_Sapphire_Winker.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b8/Austin_A30_22_February_2014.jpg/220px-Austin_A30_22_February_2014.jpg)
Trafficators are
History
They first appeared in the 1900s, when they were actuated either mechanically or pneumatically. In 1908, Alfredo Barrachini in Rome added electric lights inside the arms that turned on as they extended, but operation was still by a cable system.[1] Electric operation came in 1918 when the Naillik Motor Signal Company of Boston added electric motor drive. This system was superseded by two French inventors, Gustave Deneef and Maurice Boisson, who used a linear solenoid in 1923. The final complete system came in 1927 when Berlin-based Max Ruhl and Ernst Neuman combined internal illumination and solenoid operation: (but see Gladstone Adams).
The shape of the trafficator arm is closely based upon the shape of the semaphore signal arm used by the Royal Bavarian Railway beginning in 1890. The only difference from the railway arm is that it has only one 'blade' of the rail signal's terminal 'arrowhead', so that the retracted trafficator sits flush with the vehicle's exterior.
They were common on vehicles until the introduction of the flashing amber, red or white
References
- ^ Motavalli, Jim (3 October 2019). "The Strange but True History of the Turn Signal". Car Talk.
- The Motor Car: Its Evolution and Engineering Development. John Day. Bosch Ltd., 1975. ISBN 0-00-435016-2.
External links
The dictionary definition of trafficator at Wiktionary