Proper noun
Yablochkov (plural Yablochkovs)
A surname from Russian.
In 1876, Russian engineer Pavel Yablochkov invented a lighting system based on a set of induction coils where the primary windings were connected to a source of AC. Source: Internet
The secondary windings could be connected to several 'electric candles' (arc lamps) of his own design. citation citation The coils Yablochkov employed functioned essentially as transformers. Source: Internet