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A welding helmet in use. A welding helmet is a piece of personal protective equipment used by welders to protect the user from concentrated light and flying particles. . Different welding processes need stronger lens shades with auto-darkening filters, while goggles suffice for
Easily shaped with heat, it is cost-effective to manufacture. In 1952, MSA offered the Shockgard Helmet to protect linemen from electrical shock of up to 10,000 volts. In 1961, MSA released the Topgard Helmet, the first polycarbonate hard hat. 1962 brought the V-Gard Helmet, which today is the most widely used hard hat in the United States.
They were cheap and easy to produce and thus much used by commoners and non-professional soldiers who could not afford more advanced protection. Anecdotally, medieval literature credits the invention of the cervellière to astrologer Michael Scot c. 1233 , [ 1 ] though this is not seriously entertained by most historians. [ 1 ]
There are also safety glasses for welding, which are styled like wraparound sunglasses, but with much darker lenses, for use in welding where a full-sized welding helmet is inconvenient or uncomfortable. These are often called "flash goggles" because they provide protection from welding flash. [6]
Soviet soldiers in SSh-40 helmets at 1945 Victory Parade. The SSh-40 was the most commonly seen in-service helmet used by the Soviet Union during World War II. [citation needed] The only external difference between the SSh-39 and the SSh-40 was the six rivets near the bottom of the helmet, as opposed to the three near the top of the SSh-39 shell.
Firecracker welding [1] Firecracker welding is a rarely used form of shielded metal arc welding (SMAW). A flux-coated electrode, as used for SMAW (manual stick welding), is laid horizontally above a close-fitting butt weld. An arc is struck at one end of the electrode, which then burns along the length of the electrode. [2]
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