Otto Blathy

Ottó Titusz Bláthy (1860 to 1939) was a Hungarian electrical engineer and one of the most productive inventors of early power engineering. He is credited as co-inventor of the modern electric transformer, the voltage regulator, the AC watt-hour meter, the turbo generator, the high-efficiency turbo generator and the motor capacitor for single-phase alternating-current motors. His career as an inventor began at the Ganz Works in Budapest in 1883, where he experimented with transformers, and the word transformer is credited to him. In 1885 the ZBD alternating-current transformer was invented with the Hungarian engineers Miksa Déri and Károly Zipernowsky, the name ZBD coming from their initials. In autumn 1889 he patented the AC watt-meter.