William Morris Mordey
Guest blog by Alex Mordey Look at almost any electrical device in your home. The phone charger, the kettle, the television, printed or moulded beside the voltage figures, you will find a small wavy line: ∿. The alternating current sinusoidal wave (or Sine wave). It is one of the most reproduced symbols on earth, stamped onto every mains appliance ever manufactured, and almost nobody knows its origin. It was proposed in a single sentence, one evening, in a lecture theatre at the Institution of Electrical Engineers in 1889, by a self-taught telegraph clerk named William Morris Mordey. Ninety six years later the same Institution sat on the British committee that wrote his symbol into law. The AC Sine wave is only the most visible of his legacies. Behind it sits a body of work that helped build…