51514 INTRODUCTION TO OXYACETYLENE WELDING 1950s EDUCATIONAL SHORT

This black and white vocational training film (with opening titles missing) aims to prepare beginner welders for safe and efficient handling of oxyacetylene torches with an educational tour of oxy-fuel welding techniques (TRT: 18:06).

A man dons goggles and tests an ignited oxyacetylene torch. Narration: “Engineers are placing more and more confidence in this method of joining metals together” (0:06). A torch welder repairs a piece of damaged metal. A blowtorch and filler rod in closeup. A group of two welders working in tandem. One wears a blast shield. “Metal welding is not just another trade, it is an art” (0:25). Tools of the trade sit upon a bench, laid out for easy viewing (1:21). A welder in a protective coverall suit, cap, googles, boots, and gloves fades into view. “Never do welding of any kind without goggles” (1:39). Setting up equipment and turning on gas tanks: Cracking cylinder valves to clear clogged dirt. Attaching nozzles and attaching hose lines to the regulator dials. Red is paired to acetylene, and green is paired to oxygen (2:26). Opening the cylinder valve slowly and adjusting the regulator screws (3:37). Connecting the hose to the torch and blowing out valves (4:28). Adjusting the regulators to match pressure (5:10). Lighting the torch with a spark lighter. Narration: “Tough guys burn just as easily as sissies” (5:34). A closeup of the torch’s flame as it is adjusted, with text indicating an “inner cone” and “envelope flame.” The “neutral” luminous cone melts a sheet of steel. A greater ratio of acetylene extends the flame’s envelope and boils metal (6:04). An oxidizing flame gives off sparks. A harsh flame creates a mess, a more controlled flame’s eye does better work (7:38). A flame is calibrated. As the valve closes, a neutral flame is formed (8:45). Setting up a welding table and lighting the torch (9:10). Calibrating the flame. Proper handling of the torch. “If a job is too tough and tiring, chances are you’re not doing it right” (9:40). The torche’s cone tip approaches steel. A puddle of molten steel forms and the torch is moved across the steel in small semicircles (10:45). The torch is raised at the end of the metal sheet. An example of steel ripples after a practice session (12:02). Beading is demonstrated. A straight welding rod is melted to a right angle. The welding rod is brought to a near liquid point, then deposited on the sheet of steel as the torch heats both surfaces (12:34). An improper splattering technique is demonstrated (14:03). Sparks fly. The welding rod sticks to the sheet, then is loosened (14:42). Proper technique is reviewed in closeup (15:10). Examples of good and bad beading results are compared and contrasted. A bad example shows holes and inconsistency. An underheated weld shows lumpiness (15:25). Quitting time. Closing valves, draining both torch lines (16:22). A closeup on the torch nozzle as it is cleaned with soft metal. Hanging up the torch and removing protective gear (17:14).

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