Transformer

The transformer, invented to shift voltage and amperage, enabled the efficient transmission of alternating current over long distances, while minimizing energy loss. This invention solidified the victory of alternating current over direct current.
 William Stanley United States 1885 Transformer

The transformer, invented to shift voltage and amperage, enabled the efficient transmission of alternating current over long distances, while minimizing energy loss. This invention solidified the victory of alternating current over direct current.