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A motorcycle headlamp modulator (or simply headlamp modulator) is an accessory device that oscillates the intensity of a motorcycle headlamp at 240 ±40 cycles per minute (~4 Hz) [1] between approximately 20% and 100% of full intensity. The headlight operates at full intensity 50-70% of the time. [2]
Headlight design in the U.S. changed very little from 1940 to 1983. [ 7 ] [ 16 ] In 1940, a consortium of state motor vehicle administrators standardized upon a system of two 7 in (178 mm) round sealed beam headlamps on all vehicles—the only system allowed for 17 years.
The Auto Four [2] is a motorcycle designed and built by engineer and motorcycle enthusiast Wild Bill Gelbke during the early 1970s. Approximately seven examples were built. Gelbke, who had attended engineering school in Wisconsin and at University of Southern California, had worked for McDonnell Douglas and also owned two motorcycle shops in Chicago and Hammond, India
William "Wild Bill" Gelbke (1936–1978, born in Green Bay, Wisconsin) was an American engineer and motorcycle designer.He is noted for having designed and constructed large motorcycles powered by automobile engines, particularly the Roadog [2] and the Auto Four, the latter a motorcycle intended for mass production.
The first Ford Model T used carbide lamps for headlights and oil lamps for tail lights. It did not have all-electric lighting as a standard feature until several years after its introduction. Dynamos for automobile headlights were first fitted around 1908 and became commonplace in 1920s automobiles.
The following is a list of vehicles that feature hidden headlamps (also called pop-up headlights). [1] The vast majority of hidden headlamps are on cars, however, there are a handful of vehicles included in the list that do not fit this category. These include motorcycles, buses and trains.
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