Stopwatch for measuring average speed of vehicle, has tacheometer scale with scale gradations in speed unit, particularly in kilometer or miles per second, which is arranged on dial

摘要

The stopwatch has a tacheometer scale (4,11) with scale gradations in a speed unit, particularly in kilometer or miles per second. The tachymeter scale is arranged on a dial (1). The stopwatch has pointers (3,8), which are driven along the tacheometer scale. The tacheometer scale relates to a predetermined measuring section, whose track length differs from stretching unit contained the in the speed unit by an integral multiple of ten.