The picture shows a Zipernowksy alternating current generator mark A6/20, with an output of 80 kW, from the early 1890s.

Károly Zipernowsky, physicist, engineer, professor, is the founder of the Hungarian heavy current electrotechnical industry. His most important inventions are transformers with changeable outputs and a closed iron core, and an alternating current divider system based on parallel connected transformers.

The lighting system of the Ganz factory’s foundry was constructed with the direct current dynamo and arc lamp created by Károly Zipernowsky, who was employed by the factory. Later the arch lamp lighting appeared on the Ice Rink as well.

In 1883, along with Miksa Déri, who was also an employee of the factory, he developed a self-exciting alternating current generator, then along with Déri, he patented a multi-phase electric divider system in 1889.