This Clock Made Power Grids Possible
Cars That Think
FEBRUARY 29, 2024
The 60-hertz standard (or 50 hertz in most of the rest of the world) is taken for granted today, but in the early days of electrification—before the invention of the master station clock—the standard was seldom standard. The black hand is connected to a standard mechanical pendulum clock; the gold hand is driven by a synchronous motor.
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