Voltage Standards: A Brief History

摘要

From 1905 to 1972, the national standard of EMF or voltage used by the USA was the Weston Cell, a wet chemical primary cell or "battery" developed in 1893 by Edward Weston, of Newark in New Jersey. Weston had improved on an earlier "voltage standard" cell which had been invented by English engineer Josiah Latimer Clark in 1873. Weston cells were adopted as the International Standard for EMF/voltage in 1911.