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Conversion. Beverage containers to aviation oxygen cylinders. The first step in the manufacture of high-altitude-flying shatterproof oxygen cylinders in the metal department of a large rubber factory is the forming or stamping of the shell. Stainless steel sheets are blanked or cut into discs(left foreground). Before stamping, these discs are drawn through rolls where a drawing compound is added to both sides to facilitate the forming of the shell. The 750-ton toggle press, shown above, forms a half cylinder in one powerful stroke. Once the half cylinder is formed, it is trimmed and the value-fitting hole is punched into the spherical dome. A cleaning operation later removes the drawing compound. The cylinder halves are now ready for the various welding operations. Firestone, Akron, Ohio

Conversion. Beverage containers to aviation oxygen cylinders. The firs...

Picryl description: Public domain image of an industrial building, factory, workshop, workers, 19th-20th century, free to use, no copyright restrictions.

Conversion. Beverage containers to aviation oxygen cylinders. Before completion of the fourth and final welding operation in the manufacture of shatterproof oxygen cylinders for high altitude flying, all straps are subjected to physical tests to determine the strength of the weld. Occasional radiographic inspections are made to insure the quality of workmanship and materials after the atomic welding machine has brought the two halves of the cylinder together and made into one unit. The operator, looking through a specially designed dark safety glass, rotates the shell by sight to insure a perfect and uniform union of the two halves. Firestone, Akron, Ohio

Conversion. Beverage containers to aviation oxygen cylinders. Before c...

Public domain photograph - historical image of Ohio, United States, free to use, no copyright restrictions image - Picryl description

Conversion. Beverage containers to aviation oxygen cylinders. Before completion of the fourth and final welding operation in the manufacture of shatterproof oxygen cylinders for high altitude flying, all straps are subjected to physical tests to determine the strength of the weld. Occasional radiographic inspections are made to insure the quality of workmanship after the two halves of the cylinder are brought together in this atomic welding machine and made one unit. Here, the operator has just completed the union and is about to remove the whole cylinder. Firestone, Akron, Ohio

Conversion. Beverage containers to aviation oxygen cylinders. Before c...

Picryl description: Public domain image of workers, labor, 1940s, economic conditions, free to use, no copyright restrictions.

Conversion. Beverage containers to aviation oxygen cylinders. The first step in the manufacture of high-altitude-flying shatterproof oxygen cylinders in the metal department of a large rubber factory is the forming or stamping of the shell. Stainless steel sheets are blanked or cut into discs(left foreground). Before stamping, these discs are drawn through rolls where a drawing compound is added to both sides to facilitate the forming of the shell. The 750-ton toggle press, shown above, forms a half cylinder in one powerful stroke. Once the half cylinder is formed, it is trimmed and the value-fitting hole is punched into the spherical dome. A cleaning operation later removes the drawing compound. The cylinder halves are now ready for the various welding operations. Firestone, Akron, Ohio

Conversion. Beverage containers to aviation oxygen cylinders. The firs...

Picryl description: Public domain image of a worker, labor, factory, plant, manufacture, industrial facility, 1930s, mid-20th-century industrial photo, free to use, no copyright restrictions.