Public domain
Three-inch A.A. cartridge cases. Loading antiaircraft cartridge cases into a stress-annealing furnace to make them soft, uniform and ductile, ready for succeeding machine operations. The equipment possessed by this big Midwest plant was well suited for producing these cases in large volume
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Credit lineThree-inch A.A. cartridge cases. Loading antiaircraft cartridge cases into a stress-annealing furnace to make them soft, uniform and ductile, ready for succeeding machine operations. The equipment pos. 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.
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Three-inch A.A. cartridge cases. Antiaircraft cartridge cases are unloaded from a stress-annealing furnace which has made them soft, uniform and ductile, ready for succeeding machine operations. The big Midwest plant doing this work is ideally equipped for volume production of war necessities like t