![]() This movement was transferred to the pointer to indicate speed. Some early mechanical speedometers operated on the governor principle where a rotating weight acting against a spring moved further out as the speed increased, similar to the governor used on steam engines. The early Volkswagen Beetle and many motorcycles, however, use a cable driven from a front wheel. Many speedometers use a rotating flexible cable driven by gearing linked to the vehicle's transmission. German inventor Otto Schultze patented his version (which, like Belušić's, ran on eddy currents) on 7 October 1902. His invention had a pointer and a magnet, using electricity to work. He presented his invention at the 1889 Exposition Universelle in Paris. The speedometer was originally patented by Josip Belušić (Giuseppe Bellussich) in 1888. The electric speedometer was invented by the Croatian Josip Belušić in 1888 and was originally called a velocimeter. boats use a pit log, while aircraft use an airspeed indicator.Ĭharles Babbage is credited with creating an early type of a speedometer, which was usually fitted to locomotives. Other vehicles may use devices analogous to the speedometer with different means of sensing speed, eg. Now universally fitted to motor vehicles, they started to be available as options in the early 20th century, and as standard equipment from about 1910 onwards. A digital, LCD speedometer in a Honda InsightĪ speedometer or speed meter is a gauge that measures and displays the instantaneous speed of a vehicle.
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