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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. [ citation needed ] Today, most hard hats are made from high-density polyethylene (HDPE) or advanced engineering resins, such as Ultem .
Standard diving dress, also known as hard-hat or copper hat equipment, deep sea diving suit or heavy gear, is a type of diving suit that was formerly used for all relatively deep underwater work that required more than breath-hold duration, which included marine salvage, civil engineering, pearl shell diving and other commercial diving work, and similar naval diving applications.
The SSh-39 was of simple, more modern design, and was much easier to manufacture than the SSh-36. The SSh-39 would be the standard design for Soviet helmets for the next 29 years, with only minor changes occurring during that time. [citation needed] It is also the design for the helmet on the Tomb of the Unknown Soldier in Moscow.
Bowler hat: A hard felt hat with a rounded crown created in 1850 by Lock's of St James's, the hatters to Thomas Coke, 2nd Earl of Leicester, for his servants. More commonly known as a Derby in the United States. [19] Breton: A woman's hat with round crown and deep brim turned upwards all the way round.
Construction worker wearing an MSA Skullgard hard hat at Douglas Dam, Tennessee (), 1942. Mine Safety Appliances, or MSA Safety Incorporated, is an American manufacturer and supplier of safety equipment designed for use in a variety of hazardous conditions in industries such as construction, the military, fire service, and chemical, oil, and gas production.
Kettle hat: 12th century: Common all over medieval Europe. Morion: 16th and early 17th centuries: Europeans (esp. associated with Spanish Conquistadores) Nasal helmet: Early Middle Ages: Byzantine Empire, later common all over Europe. Pickelhaube [4] [5] 1842: especially by Prussia & German Empire and other Europeans until 1918 Raupenhelm: c ...
By 1886, Stetson's hat company was the largest globally and had mechanized the hat-making industry ("producing close to 2 million hats a year by 1906"). [2] The Stetson Hat Co. ceased production in 1968 and licensed another hat company. [2] However, these hats still bear the Stetson name, with the hats produced in St. Joseph, Missouri.
The Brodie helmet is a steel combat helmet designed and patented in London in 1915 by Latvian inventor John Leopold Brodie (Leopolds Janno Braude).A modified form of it became the Helmet, Steel, Mark I in Britain and the M1917 Helmet in the US.