Aron pendulum counter
The Aron pendulum counter is an electrical energy meter developed by Hermann Aron . It can be regarded as a forerunner of the electromotive electricity meters ( Ferraris meters ) used later. It has not been used for a long time.
function
In principle, it consisted of three clockworks . One for the time, and two for energy measurement. At the end of each pendulum there was a voltage coil and a current coil underneath. The current coils were polarized once with the field of the voltage coil and opposite in the other pendulum. As a result, the pendulum frequency increased with the product of current and voltage in one pendulum, and decreased equivalently in the other pendulum. The difference in time between these two movements was given on a counter via a differential gear . This largely compensated for the uneven running of the movements.
With this counter, the clock mechanism was used to switch between two counters. This made it possible to distinguish between day and night tariffs.
literature
- Hans-Heinrich Schmid : "Lexicon of the German watch industry 1850 - 1980: company addresses, production program, company logos, brand names, company histories." (3rd expanded edition 2017); Editor: German Society for Chronometry eV; ISBN 978-3-941539-92-1