Hermann Aron
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Hermann Aron was a German researcher of electrical engineering.
Dr Aron's pendulum meter, as sold in Great Britain by GEC, from 1888. One pendulum bob is labeled as "B". Originally, the meter could be used only for direct current. Later, it was adapted for AC power.
Hermann Aron's grave in Weissensee (Berlin)
Specimen of Aron's pendulum meter
Late model of Aron's power meter
Hugo Hirst, 1st Baron Hirst
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Hugo Hirst, 1st Baron Hirst, known as Sir Hugo Hirst, Bt, between 1925 and 1934, was a German-born British industrialist.
Hermann Aron
…clockwork clocks that required manual winding monthly. Later models were self-winding by electricity. This meter was introduced into Great Britain by Hugo Hirst, and made and sold by his General Electric Company from 1888. He also invented another Wattmeter, the eponymous 'Aronschaltung' . This is a circuit for…
Sir Hugo Hirst, Bart, around 1930