Ottó Titusz Bláthy (11 August 1860 – 26 September 1939) was a Hungarian electrical engineer.
In his career, he became the co-inventor of the modern electric transformer, the tension regulator, the AC watt-hour meter.motor capacitor for the single-phase (AC) electric motor, the turbo generator, and the high-efficiency turbo generator.Bláthy's career as an inventor began during his time at the Ganz Works in 1883.
There, he conducted experiments for creating a transformer.
It is noteworthy that the name "transformer" was created by Bláthy.
In 1885 the ZBD model alternating-current transformer was invented by three Hungarian engineers: Ottó Bláthy, Miksa Déri and Károly Zipernowsky.
(ZBD comes from the initials of their names).
In the autumn of 1889 he patented the AC watt-meter.