Hermann Aron

Aron was born in Kempen (Kępno), in modern-day Poland, at the time a shtetl in the Province of Posen.

He taught at the University of Berlin where he became professor of physics, and at the Prussian Army's school for artillery and engineers.

A differential gear mechanism measured the difference in speed between the two clocks and counted this on a series of dials.

[3] This meter was introduced into Great Britain by Hugo Hirst, and made and sold by his General Electric Company from 1888.

[2] At this time Nora had around 3,000 employees and a market share of around 8%, making them the fourth-largest manufacturer after Telefunken, SABA and Mende.

[2] Antisemitism continued to grow in Germany, and in 1935 the family sold the business to Siemens-Schuckert and fled to the USA.