Company Description. Scully Signal Company, established in 1936, is a leader in engineering, manufacturing, and sales of safety control systems for the fueling, storage and transport of petroleum products worldwide. Scully has pioneered major technological inventions and advancements involving the transfer of volatile and hazardous liquids. Headquartered in Wilmington, Massachusetts, all products are made in the U.S.A. Scully has been certified t...