Linus Yale, Inventor of The Pin Tumbler Lock

Linus-YaleLinus Yale invented pin tumbler lock also known as Yale lock. Linus Yale, was born in Salisbury, New York, on April 4, 1821. During his childhood, Yale was inquisitive about lock and keys, as his father Linus Yale Sr., opened a shop and began to manufacture bank locks in Newport, N.Y., during 1840. His father, Linus Yale Sr., was a successful lock inventor.

During 1840s Yale invented one of the first modern locks based on pin-tumble design. He opened the Yale Lock Shop in Newport, New York and Shelburne, Massachusetts, in 1847 and 1860 repectively. His lock shop in Shelburne Falls, developed Yale Magic Bank Lock and the Yale Double Treasury Bank Lock. In 1862 he introduced the combination lock.

Yale’s shops specialized in bank locks. Linus Yale invented the “Yale Infallible Bank Lock” for safes and vaults.

Yale Lock Manufacturing Company

In 1868, he founded a lock company with Henry Robinson Towne called the Yale Lock Manufacturing Company in the South Stamford, CT. The name of the Yale Lock was later changed to Yale & Towne. Today, Yale lock company is owned by Assa Abloy, a Swedish lock manufacturer.

Yale patented more than 20 lock designs and mechanisms, first on 6 May 1851 (Pat. #8071) in Newport, New York.

Yale Lock or Pin Tumbler Lock

Yale’s most important invention is the cylinder lock, based on the pin-tumbler mechanism. The pin-tumbler lock mechanism is derived from primitive forms of tumbler locks used during 4000 BC in Egypt. It consisted of a wooden post affixed to the door, and a horizontal bolt that slid into the post that was used as the key. In 1848, Linus Yale, Sr. invented the modern pin-tumbler lock which was later modified by Linus Yale, Jr. in 1861.  Linus Yale, Jr. modified the original pin-tumbler lock designed by his father, by inventing a smaller flat key with serrated edges as well as pins inside the lock itself. The modified design was patented by Linus Yale, Jr. and the same the pin-tumbler lock design is still being used even today.

Yale patented his cylinder pin-tumbler lock in 1861. Yale was awarded by National Inventors Hall of Fame, Inducted 2006. Yale died of a suddent heart attack in the same year, the Yale Manufacturing Company was founded.

Say Thanks to These Five Famous Locksmiths For Securing the World

Robert Barron

Robert Barron Lock

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Robert Barron was an English locksmith notable for his invention of the double–acting tumbler lock in 1778

Joseph Bramah

Joseph Bramah Locksmith

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Joseph Bramah is best known for the invention of the hydraulic press and the Bramah lock. The Bramah lock was patented in 1784 and was considered unpickable for more than 65 years until A.C. Hobbs picked it, taking over 50 hours.

Jeremiah Chubb

Jeremiah Chubb_Chubb Detector Lock

Jeremiah Chubb invented the first detector lock in 1818. He invented the lock as the result of a Government competition to create an unpickable lock and it remained unpicked until 1851. A Chubb detector lock was the most advanced and secure tumbler lock. When someone tries to pick the lock or to open it using the wrong key, the lock is designed to jam in a locked state until either a special regulator key or the original key is used.

In 1820, Jeremiah Chubb and his brother Charles Chubb made some modification to their original lock design. The new version of the lock didn’t needed a regulator key to reset the lock, once it has been tried to open without it’s key. The number of lever tumblers was also increased to 6 (original lock had four). This modified version of lock was called combined Bramah–Chubb lock

Combined Bramah Chubb Lock

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James Sargent

James Sargent described the first successful key-changeable combination lock in 1857, the prototype for those used in contemporary bank vaults. The combination lock became popular with safe manufacturers and the United States Treasury Department.

Linus Yale Sr. & Linus Yale Jr.

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Linus Yale, Sr. invented a pin tumbler lock in 1848. Linus Yale, Jr. improved his father’s lock in 1861, using a smaller, flat key with serrated edges that is the basis of modern pin-tumbler locks. Yale developed the modern combination lock in 1862.

How Well Do You Know Barbara Millicent Roberts, Your “Barbie” Doll?


Everyone knows Barbie. She is classy, sassy, fashionable and desirable. But, have you ever heard of Barbara Millicent Roberts. I guess, No.
Barbie’s full name is Barbara Millicent Roberts. Her parents’ names are George and Margaret Roberts from the town of Willows, Wisconsin, says the novels published by Random House in the 1960s. Barbie attended Willows High School and also the fictional Manhattan International High School in New York City.

90 percent of girls ages 3-10 who own at least one Barbie doll. Barbie doll has represented more than 40 different nationalities and 110 number of poses.

Barbie was created by an American businesswoman Ruth Handler, using a German doll called Bild Lilli as her inspiration. Bild Lilli is the  predecessor of Barbie. Barbie got her name from Handler’s child, Barbara.  Barbie’s first boyfriend, Ken, debuted two years after Barbie in 1961 was named after the son of Ruth Handler.

The Bild Lilli Doll was a German comic-strip character, created by Reinhard Beüthien for a German tabloid- Bild-Zeitung. During early 1950s, it was transformed into a fashion doll by toy company O&M Hausser and produced from 1955 to 1964. Mattel acquired the rights to the doll and German production stopped.

Barbie was first launched in March 1959, by an American toy-company Mattel and only came in blonde or brunette. Total of 300,000 Barbie dolls sold in 1959. Just like Barbie, Bild Lilli Doll was also manufactured by the American toy-company Mattel, Inc. Although, it was first created by German toy company O&M Hausser and produced from 1955 to 1964.

A standard Barbie doll is 11.5 inches tall, giving a height of 5 feet 9 inches at 1/6 scale. Barbie’s vital statistics have been estimated at 36 inches (chest), 18 inches (waist) and 33 inches (hips). But, if Barbie was a real girl it would be impossible to have exact vital statistics of 36-18-38.

Barbie with bendable legs was first introduced in 1956 and Barbie with eyes that could open and shut, was introduced in 1967. The best-selling Barbie doll is Totally Hair Barbie, introduced in 1992.

According to Wikipedia, Barbie has had over 40 pets including cats and dogs, horses, a panda, a lion cub, and a zebra. She owns a wide range of vehicles, including pink Corvette. Barbie also holds a pilot’s license, and also works as a flight attendant. Not only this, Barbie operates commercial airliners.  Barbie’s Dream House was introduced in 1960.

Barbie doll was one of the first toys to advertised via television. Mattel claims, three Barbie dolls are sold every second. Over a billion Barbie dolls have been sold worldwide in over 150 countries.

The standard range of Barbie dolls and related accessories are manufactured to approximately 1/6 scale,  known as playscale.

Barbie products includes range of dolls with their clothes, accessories, Barbie branded goods such as books, apparel, cosmetics and video games. Barbie has also appeared in films, Toy Story 2 and Toy Story 3.

Guess What! Sarah Burge is a British woman who is popularly known as Human Barbie and has undergone over 100 plastic surgeries over the past 20 years just to look like Barbie. This mental condition is often termed as “Barbie Syndrome”. It is a term used to depict the desire to have a physical appearance and lifestyle as similar to the Barbie doll.

3 Mythological Origin Stories About Fruit You Must Know


When you eat a fruit you never think about their origin. But fruits have a very interesting origin stories about themselves. For example, coconut is said to have originated from a severed head and apple was originally yellow coloured and cast  radiant golden glow across the sky during sunset.

Let us learn about other interesting mythological origin stories about fruits.


Origin of coconut dates back to the One Thousand and One Nights story of Sinbad the Sailor. Sindabad, during his fifth voyage bought and sold coconuts. There are a number of myths about coconuts. Coconuts are said to be grew from a severed human head, two eyes and a mouth. The myth says, a head was buried and sprouted into the first coconut tree.

According to an Arapesh myth, coconuts grew form a severed head of a man who killed a woman for walking ahead of her husband, The man was then killed and beheaded. Another myth from the Admiralty Islands tells coconut grew from a head, which was cut down by his own brother. According to myth, two brothers steal a canoe to go fishing. The owner of the canoe chases them, and he throw all the fish they caught into the water. With no fish left, the younger brother cuts his older brother into pieces and comes back. He left his head and buried under the sand. The head which was buried, sprouted into a coconut tree.


Apple is said to be a heavenly fruit. According to Greek mythology, apple trees were created by Gaia-the Earth and given to Hera as a wedding present. Myth says the first apples were golden and the apple tree was under the care of three minor goddesses (the Hesperides) and a hundred-headed dragon (Ladon). It’s a well-known of Hercules, where he steals the golden apples, killing dragon. Interestingly, golden apples kept in a garden in the West direction cast their radiant golden glow across the sky during sunset.


Strawberries are the fruit associated with the Norse goddess Friga.According to christian mythology, strawberries were the fruits of the Virgin. their radiant golden glow across the sky during sunset.

Strawberry were the fruit of fertility, love and virginity. Strawberry was favourite fruit of many gods and goddesses such as Venus, Aphrodite, Freja, and the Virgin Mary. But, it was Virgin Mary’s favourite fruit, so much that she wanted all strawberries be left for her. She made a rule that anyone who approached Heaven with traces of strawberry juice or fruit on them would be banished and denied entrance to heaven. Strawberry was a holy fruit.