Public domain
Transformer manufacture. It's a formidable task, but Jack Hassel can wind one of these asbestos insulated low volts coils in a day. Essential to America's war efforts, these asbestos coils are used in air cooled transformers which are explosion-proof, hence advantageous for use in ships, mines and l
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineTransformer manufacture. It's a formidable task, but Jack Hassel can wind one of these asbestos insulated low volts coils in a day. Essential to America's war efforts, these asbestos coils are used in. 1942-01-01. Palmer, Alfred T., United States. Office For Emergency Management. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.