Delta Star Electric Company

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Chicago-based company Delta Star was founded in 1908 to produce electrical devices that generated and distributed electrical energy.  Early on, the company produced "a complete line of high-voltage indoor and outdoor switches including disconnects, transfers, interrupters, and disrupters for single and group operation."  In the 1950's, the company was purchased by the H.K. Porter Company, renamed, and moved to Belmont, California.  Subsequent plants were opened and in 1980, the Chicago plant was closed.  Though the original plant was closed, the Delta Star name was used at other plants in California and Virginia.