Chester Greenwood - Earmuffs
By Mary Bellis
Chester Greenwood was born in Farmington, Maine in 1858. A grammar school dropout, he invented earmuffs at the age of 15 (1873). While testing a new pair of ice skates, he grew frustrated at trying to protect his ears from the bitter cold. After wrapping his head in a scarf, which was too bulky and itchy, he made two ear-shaped loops from wire and asked his grandmother to sew fur on them. He patented an improved model with a steel band which held them in place and with Greenwood's Champion Ear Protectors, he established Greenwood's Ear Protector Factory. He made a fortune supplying Ear Protectors to U.S. soldiers during World War I. He went on to patent more many other inventions. In 1977, Maine's legislature declared December 21 "Chester Greenwood Day" to honor a native son and his contribution to cold weather protection.
Farmington Maine is now the Earmuff Capital of the World. There is a parade that celebrates Chester's birthday the first Saturday in December, with local police cruisers in the parade decorated as giant earmuffs.
Info From : inventors.about.com
Tuesday, October 5, 2010
Monday, September 27, 2010
Adhesives and Glue - What Sticks?
Archeologists excavating burial sites from 4000 BC have discovered clay pots repaired with glue made from tree sap. We know that the ancient Greeks developed adhesives for use in carpentry, and created recipes for glue that included the following items as ingredients: egg whites, blood, bones, milk, cheese, vegetables and grains. Tar and beeswax were used by the Romans for glue.
Around 1750, the first glue or adhesive patent was issued in Britain. The glue was made from fish. Patents were then rapidly issued for adhesives using natural rubber, animal bones, fish, starch, milk protein or casein.
Superglue - Synthetic Glue
Superglue or Krazy Glue is a substance called cyanoacrylate that was discovered by Dr. Harry Coover while working for Kodak Research Laboratories to develop an optically clear plastic for gunsights in 1942. Coover rejected cyanoacrylate because it was too sticky.
In 1951, cyanoacrylate was rediscovered by Coover and Dr Fred Joyner. Coover was now supervising research at the Eastman Company in Tennessee. Coover and Joyner were researching a heat-resistant acrylate polymer for jet canopies when Joyner spread a film of ethyl cyanoacrylate between refractometer prisms and discovered that the prisms were glued together.
Coover finally realized that cyanoacrylate was a useful product and in 1958 the Eastman compound #910 was marketed and later packaged as superglue.
Hot Glue - Thermoplastic Glue
Hot glue or hot melt adhesives are thermoplastics that are applied hot (often using glue guns) and then harden as they cool. Hot glue and glue guns are commonly used for arts and crafts because of the wide range of materials that hot glue can stick together.
Procter & Gamble chemical and packaging engineer, Paul Cope invented thermoplastic glue around 1940 as an improvement to water-based adhesives that were failing in humid climates.
Info From : inventors.about.com
Monday, September 6, 2010
Semoga geng-geng atau kengkawan atau sedara mara atau jiran-jiran blog saya di dalam keadaan sihat-sihat belaka... Yela da nak dekat raya kan... Kalau xsihat, rajin2 la makan ubat yer.... kang xdapek nak rayo plak....
Maka, di kesempatan ini saya nak ucapkan selamat hari raya kepada korang semua. Maaf zahir dan batin... Mana tau sepanjang saya bergiat dalam dunia blog ni semenjak 2007 ada yang terasa ati ngan saya...
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Nilai..... Soromban... tunggu.... den pulang esok....