Information AboutHelmet |
| CATEGORIES ABOUT HELMET | |
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| headgear | |
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A helmet is a form of Protective Gear worn on the Head . Traditionally, helmets have been made of Metal . In recent decades helmets made from Resin or Plastic and typically reinforced with Aramid fiber (e.g. Twaron or Kevlar ) have become preferred for most applications. Designed for protection of the head in combat, or in civilian life, from sports injuries, falling objects or high-speed collisions. Helmets are common in the Military , Construction , Mining , and some sports, including American Football , Baseball , Ski , Snowboarding , Ice Hockey , Equestrian Sports , Motorsports , and Rock Climbing . Motorcycle Helmet s and Bicycle Helmet s are compulsory headgear in some jurisdictions; in the United Kingdom only Sikh s are allowed to ride Motorcycle s without wearing motorcycle helmets. Bicycle Helmet compulsion and even strong promotion has been a heated subject of debate amongst cyclists and scientists since at least the 1990s, lately focusing on alleged net protective effect at the population level. MILITARY ORIGINS AND SYMBOLISM See Also: Combat helmet Helmets were among the oldest forms of combat protection, and are known to have been worn by Ancient Greeks , Romans , throughout the Middle Ages , and up to the end of the 1600s by many combatants. At that time, they were purely military equipment, protecting the head from cutting blows with Sword s, flying Arrow s, and low-velocity Musket ry. They were initially constructed from Leather , and then Bronze and Iron during the Bronze and Iron Ages, but soon came to be made entirely from forged Steel in many societies after about 950A.D. Military use of helmets declined after 1670, and rifled Firearms ended their use by foot soldiers after 1700. By the 18th century, cavalry units often wore steel body cuirasses, and frequently metal skull protectors under their hats, called "secrets". The Prussian spiked helmet, or '' Pickelhaube '', offered almost no protection from the increased use of heavy artillery during World War I , and in 1916 was replaced by the German steel helmet, or '' Stahlhelm '', and afterwards it was worn merely for tradition. The Napoleonic era saw ornate cavalry helmets reintroduced for Cuirassier s and Dragoon s in some armies; they continued to be used by French forces during World War I as late as 1915, when they were replaced by the new French Adrian Helmet . It was soon followed by the adoption of similar steel helmets by the other warring nations. World War I and its increased use of heavy artillery had renewed the need for steel helmets, which were quickly introduced by all the combatant nations for their foot soldiers. In the 20th century, such helmets offered protection for the head from shrapnel and spent, or glancing, bullets. The use of protective helmets by millions of fighting men in the two world wars increased awareness of "hard hat" protection. By the 1950s, hundreds of new applications for helmets were found. The helmet offered an unexpected advantage: Symbolism . It can signify that, like a soldier, the wearer is someone qualified for or capable of a certain task or activity, such as construction, operation of heavy machinery, or participation in certain sports. Today's militaries often use high-quality helmets made of ballistic materials such as Kevlar , which have excellent bullet and fragmentation stopping power. Some helmets also have good non-ballistic protective qualities, though many do not. Non-ballistic injuries may be caused by many things, including (but not limited to) concussive Shockwaves from Explosion s, motor vehicle accidents, or falls. FUNCTION AND STRUCTURE Despite various designs and requirements, helmets attempt to protect the user's head through a mechanical energy-absorption process. Therefore, their structure and protective capacity are altered in high-energy impacts. Beside their energy-absorption capability, their volume and weight are also important issues, since higher volume and weight increase the injury risk for the user's head and neck. Classical helmets from the ancient Greeks to today treat the head uniformly and are currently tested on rigid headforms. Anatomical helmets adapted to the inner head structure were invented by Neurosurgeons at the end of the 20th century. Since the materials are disposed according to the anatomical structure of the Head , they are smaller and lighter than the classical helmets. IMAGES |
Image:Casque 501590 Fh000009jpgBack Of A
| "http://wwwinformationdelightinfo/information/entry/SPECTRA_helmet" class="copylinks">SPECTRA Helmet currently used in the French Military |
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| "http://wwwinformationdelightinfo/information/entry/Gordon_Cooper" class="copylinks">Gordon Cooper in Helmet and Pressure Suit |
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| "http://wwwinformationdelightinfo/information/entry/Pith_helmet" class="copylinks">Pith Helmet of Harry S Truman |
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| "http://wwwinformationdelightinfo/information/entry/lacrosse" class="copylinks">Lacrosse helmet |
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Image:ClimbinghelmetsaajpegA Helmet Used For
| "http://wwwinformationdelightinfo/information/entry/rock_climbing" class="copylinks">Rock Climbing |
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Image:Aa Workhelmet VisorjpgWork
| "http://wwwinformationdelightinfo/information/entry/safety_helmet" class="copylinks">Safety Helmet with visor |
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| "http://wwwinformationdelightinfo/information/entry/Motorcycle_helmet" class="copylinks">Motorcycle Helmet |
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Image:Riotsquad Helmetjpg
| "http://wwwinformationdelightinfo/information/entry/Riotsquad_helmet" class="copylinks">Riotsquad Helmet with back-of-the-neck protector |
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Image:Bike HelmetjpgA
| "http://wwwinformationdelightinfo/information/entry/bicycle_helmet" class="copylinks">Bicycle Helmet |
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| "http://wwwinformationdelightinfo/information/entry/Equestrian_helmet" class="copylinks">Equestrian Helmet for Horseback Riding |
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Image:TThelmetpngRendering Of An American
| "http://wwwinformationdelightinfo/information/entry/College_football" class="copylinks">Football helmet |
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Image:US Vietnam Helmetjpg
| "http://wwwinformationdelightinfo/information/entry/M1_Helmet" class="copylinks">M1 Helmet in Vietnam |
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| "http://wwwinformationdelightinfo/information/entry/Pickelhaube" class="copylinks">Pickelhaube helmet |
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