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Galeaspida (from Latin, 'Helmet shields') is an extinct taxon of jawless marine and freshwater fish. The name is derived from galea , the Latin word for helmet , and refers to their massive bone shield on the head.
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.
In 2012, it was reported that the United States Marine Corps was researching and testing MTek FAST G3A ballistic face shields that could protect troops from 7.62×39mm rounds as well as from shrapnel. They were described as lighter and more compact versions of the face shields used by explosive ordnance disposal personnel.
For defensive purposes, the shield was the most common item used by warriors, although sometimes mail and helmets were used. Weapons also had symbolic value for the Anglo-Saxons, apparently having strong connections to gender and social status. Weapons were commonly included as grave goods in the early Anglo-Saxon burials. The vast majority of ...
The first recorded European reference to a helmet's visor in the Middle Ages is found in the 1298 will of Odo de Roussillon, which speaks of a heume a vissere. [4] Whether this statement refers to a pivoting visor or a fixed faceplate is not clear; but by the early fourteenth century artistic depictions of moving visors appear quite frequently. [4]
A riot shield is a lightweight protection device, typically deployed by police and some military organizations, though also utilized by protestors. Riot shields are typically long enough to cover an average-sized person from the top of the head to the knees, though smaller one-handed models may also be used.
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