WebEdwin L. Wiegand, Pittsburgh, Pa. assignor to Edwin L. Wiegand Company, Pittsburgh, Pa., 3. corporation of Pennsylvania Application December 12, 1940, Serial No. 369,764 - 15 Claims. (CI. 226-23) - - My invention relates to the manufacture of electric heaters, and more particularly to the manufacture of electrical heating elements com The company traces its origin to 1915 when a Pittsburgh engineer, Edwin L. Wiegand, received a patent for a resistance heating element embedded in an insulated refractory enclosed in a metal sheath. This electric heating method would eventually be applied to home cooking and heating as well as manufacturing processes. Chromalox incorporated in 1917, with the company's first order for a strip heater used in a product that became the modern household clothes iron. The produc…
EDWIN L. WIEGAND COMPANY in Allegheny, PA
http://waywiser.fas.harvard.edu/people/7143/edwin-l-wiegand-company WebMar 23, 2024 · Wiegand founded the company in Pittsburgh, Pa., in 1917. “The innovative spirit of Edwin L. Wiegand continues on today as Chromalox continues to pioneer new … topo maths
US2413477A - Electric hot-plate unit - Google Patents
WebOct 6, 2024 · Raised in Greenfield, Regis graduated from Central Catholic High School and enlisted in the US Navy on his 18th birthday, serving on the USS Hamblen during WWII. Post-war, he worked for E.L.... WebEdwin L. Wiegand, a self-taught engineer from Pittsburgh, PA, had always shown an intense curiosity in electrical conductivity. In his makeshift laboratory off his family’s dining room, … WebEdwin L. Wiegand Company is a Pennsylvania Domestic Business Corporation. The company's filing status is listed as Withdrawn - Consolidated Inactive and its File … topo maps of connecticut