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![Drill press operator, Allegheny Ludlum Steel[e] Corp., Brackenridge, Pa., 1941?. Creator: Alfred T Palmer.](https://d21cmcylgnyv91.cloudfront.net/d0T5tLPiUcTgr1JztBg8Cylt2pc=/fit-in/224x/2910381.jpg "Drill press operator, Allegheny Ludlum Steel[e] Corp., Brackenridge, Pa., 1941?. Creator: Alfred T Palmer.")
![Bessemer converter (iron into steel), Allegheny Ludlum Steel[e] Corp., Brackenridge, Pa., (1941?). Creator: Alfred T Palmer.](https://d21cmcylgnyv91.cloudfront.net/0KjWPde_2oIJMDIosKpX8P8UI20=/fit-in/224x/2910385.jpg "Bessemer converter (iron into steel), Allegheny Ludlum Steel[e] Corp., Brackenridge, Pa., (1941?). Creator: Alfred T Palmer.")