Zinsco

Zinsco was a manufacturer of circuit breakers and electrical distribution panels, founded by Emile Martin Zinsmeyer and his son Martin Emile Zinsmeyer in the early 1930s. Originally the West Coast division of the Frank Adam Electric Company, whose main facility was in St Louis, Missouri, the company became independent as the Zinsmeyer Company following the onset of the Great Depression. The younger Zinsmeyer took over the company from his father in 1943 and renamed it Zinsco. The company was sold in 1973 to GTE-Sylvania, who continued to manufacture breakers and panels to the original Zinsco design for some years; this product line is now discontinued.