when did they start putting odometers in cars
Odometer In 1903 Arthur P. and Charles H. Warner, two brothers from Beloit, Wisconsin, introduced their patented Auto-meter. The Auto-Meter used a magnet attached to a rotating shaft to induce a magnetic pull upon a thin metal disk. Measuring this pull provided accurate measurements of both distance and speed information to automobile drivers in a single instrument. The Warners sold their company in 1912 to the Stewart & Clark Company of Chicago. The new firm was renamed the Stewart-Warner Corporation. By 1925, Stewart-Warner odometers and trip meters were standard equipment on the vast majority of automobiles and motorcycles manufactured in the United States.
Event data recorder Event data recorders were introduced to American open-wheel championship CART in the 1993 season,[10] and the Formula One World Championship in 1997.[11] This allowed to study crashes that allow to develop new car rules and track safety measures that reduce damages.