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Protective Eyewear

Protective Eyewear

Background

In 1880, P. Johnson invented eye protectors with two layers of semi-opaque cloth. Reducing the light intensity for those exposed to intense light but without impact protection.

 

 

Ballistic Eyewear

In 1885, Arthur T. Fullicks bonded several pieces of glass together while John Crane Woods had patented the idea of bonding sheets of transparent cellulose nitrate between two sheets of glass seemingly with safety of the users in mind.

 

From 1910-1914, Edouard Benedictus, a French chemist, obtained French, British and US patents for manufacturing of laminated safety glass. Using gelatin and other adhesives in the laminated glass.

 

In the early 1960s, Polycarbonate became the standard material for ballistic eyewear after the U.S. government sponsored experiments testing the performance of various plastics and glass for potential use and these tests which are similar to current U.S. military standard. Examining the effects of manufacturing and layering techniques on ballistic performance of polycarbonates.

 

Research into improving protection of ballistic eyewear continued in the early 1970s by Wigglesworth using 3mm and 2mm thicknesses of allyl resin and tempered glass for ballistic resistance. Injuries from laser light reaching the eyes were protected by new ballistic eyewear in 1996 described by Belkin. In 2001, Kelly investigated into a much greater level of ballistic protection than previously available. And advances in manufacturability were still needed to make it affordable and plentiful.

 

In 2006, Hartley et al. were awarded a US Patent for Eyewear for ballistic and light protection such that it allowed easier interchange of lenses

 

 

Applications
Goggles

The Inuit and Yupik people carved Inuit snow goggles from caribou antler, wood, and shell to help prevent snow blindness. The goggles were curved to fit the user's face and had a large groove cut in the back to allow for the nose. A long thin slit was cut through the goggles to allow in a small amount of light, diminishing subsequent ultraviolet rays. It was held to the head by a cord made of caribou sinew.

 

Around 1930, goggles were worn by drivers of uncovered cars to prevent irritation of the eyes by dust or wind. Likewise in the first ten years after the invention of the airplane in 1903 goggles became a necessity as wind blow became more severe as aircraft speeds increased and as protection against bugstrikes at high altitudes. The first pilot to wear goggles was probably Charles Manly in his failed attempt to fly Samuel Langley's aerodrome in 1903.

 

The First Safety Goggle called SANIGLAS was developed by Julius King Optical Company in collaboration with American Optical in 1909.

 

In 1914, Garrett Morgan (1877-1963) an African American patented the Gas Mask, a mask which had a lens made from safety glass. On July 25, 1916, Morgan made national news for using a gas mask he had invented to rescue several men trapped during an explosion in an underground tunnel beneath Lake Erie. After the rescue, Morgan’s company received requests from fire departments around the country who wished to purchase the new masks. The Morgan gas mask was later refined for use by U.S. Army during World War I. In 1921, Morgan was awarded a patent for a Safety Hood and Smoke Protector. Two years later, a refined model of his early gas mask won a gold medal at the International Exposition of Sanitation and Safety, and another gold medal from the International Association of Fire Chiefs.

 

 

Application in military
 

During World War I, laminated glass was used to make small, round lenses in gas masks and for windshields in military motor vehicles and aircraft. Protective Face Mask WWI: Tank Mask ‘Masks were worn by British crews in tanks during the First World War. The leather mask is shaped to fit around the eyes and nose and the chain mail was used to protect against splinters from explosions as the tank came under fire. Life inside these primitive vehicles would have been extremely uncomfortable as well as dangerous.’ Military personnel may be required to use ballistic eyewear especially when in combat.

 

Application in industry
 

In the 1940s, manufacturers figured out how to sand and make safety glasses and goggles for welders, construction workers, and the like. In 1935, furnace goggles for forge workers and steel melters to protect them from glare and impact hazards even sparks. Hunters are also frequent users of ballistic eyewear because of the possibility of a ricochet or the recoil of the firearm that may result in injury.

 

Application in security
 

Law enforcement officers also use ballistic eyewear for confrontations.

 

 

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