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The solution developed for high-speed steam engines was the "automatic" governor. Rather than controlling the flow rate of steam, it controlled the timing or 'cut-off' of the inlet valves. [6] [7] This governor was interspersed between the crankshaft and the eccentric driving the valve gear. It was often made as part of the engine's flywheel.
Officials in American and Canadian football formerly used a starting pistol to end each quarter of a game. In the NFL this was first done in 1924, to avoid confusion with the whistles and air horns used for other signals; at the time the stadium clock did not show the official game time, which was kept by the officials on the field.