padlocks

Padlock From Wikipedia, the free encyclopedia Padlocks are portable locks with a shackle that may be passed through an opening (such as a chain link, or hasp staple) to protect against unauthorized use, theft, vandalism, or harm. Contents 1 History 2 Rating 3 Components 4 Combination locks 5 Padlock icon symbolising a secure web transaction 6 See also 7 External links 8 References History There are padlocks dating to the Roman Era, 500 BC – 300 AD. [1] They were known in early times by merchants traveling the ancient trade routes to Asia and China. [2] Padlocks have been used in China since the late Eastern Han Dynasty (25–220 AD). According to Hong-Sen Yan, director of the National Science and Technology Museum, early Chinese padlocks were mainly "key-operated locks with splitting springs, and partially keyless letter combination locks". [3] Padlocks were made from bronze, brass, silver, and other materials. The use of bronze was more prevalent for the early Chinese padlocks. [3] Padlocks with spring tine mechanisms have been found in York, England, at the Jorvik Viking settlement, dated 850 AD. During this period between 850 AD and the early 1000 AD was when the name 'padlock' was coined. It was contrived during this period to initially hold livestock within its quarters of the paddock, whereby the word ad was derived and applied to form the current word. [4] Smokehouse locks, designed in England, were formed from wrought iron sheet and employed simple lever and ward mechanisms. These locks afforded little protection against forced and surreptitious entry. Contemporary with the smokehouse padlocks and originating in the Slavic areas of Europe, "screw key" padlocks opened with a helical key that was threaded into the keyhole. The key pulled the locking bolt open against a strong spring. Padlocks that offered more key variance were the demise of the screw lock. Improved manufacturing methods allowed the manufacture of better padlocks that put an end to the Smokehouse around 1910. Around the middle of the 19th century, "Scandinavian" style locks, or "Polhem locks", invented by the eponymous Swedish inventor Christopher Polhem, became a more secure alternative to the prevailing smokehouse and screw locks. These locks had a cast iron body that was loaded with a stack of rotating disks. Padlock - Wikipedia, t he f ree encyclopedia h tt p://en .wik ipedia.org/wiki/Padlock 1 of 4 3/11/2015 1:15 PM

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snapshot of basic padlock info. just the basics, need to go to wiki for more than that.

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PadlockFrom Wikipedia, the free encyclopedia

Padlocks are portable locks with a shackle that may be passed through an opening (such as a chain link, orhasp staple) to protect against unauthorized use, theft, vandalism, or harm.

Contents

1 History2 Rating3 Components4 Combination locks5 Padlock icon symbolising a secure web transaction6 See also7 External links8 References

History

There are padlocks dating to the Roman Era, 500 BC 300 AD.[1] They were known in early times bymerchants traveling the ancient trade routes to Asia and China.[2]

Padlocks have been used in China since the late Eastern Han Dynasty (25220 AD). According to Hong-SenYan, director of the National Science and Technology Museum, early Chinese padlocks were mainly"key-operated locks with splitting springs, and partially keyless letter combination locks".[3] Padlocks weremade from bronze, brass, silver, and other materials. The use of bronze was more prevalent for the earlyChinese padlocks.[3]

Padlocks with spring tine mechanisms have been found in York, England, at the Jorvik Viking settlement, dated850 AD. During this period between 850 AD and the early 1000 AD was when the name 'padlock' was coined. Itwas contrived during this period to initially hold livestock within its quarters of the paddock, whereby the wordpad was derived and applied to form the current word. [4]

Smokehouse locks, designed in England, were formed from wrought iron sheet and employed simple lever andward mechanisms. These locks afforded little protection against forced and surreptitious entry. Contemporarywith the smokehouse padlocks and originating in the Slavic areas of Europe, "screw key" padlocks opened witha helical key that was threaded into the keyhole. The key pulled the locking bolt open against a strong spring.Padlocks that offered more key variance were the demise of the screw lock. Improved manufacturing methodsallowed the manufacture of better padlocks that put an end to the Smokehouse around 1910.

Around the middle of the 19th century, "Scandinavian" style locks, or "Polhem locks", invented by theeponymous Swedish inventor Christopher Polhem, became a more secure alternative to the prevailingsmokehouse and screw locks. These locks had a cast iron body that was loaded with a stack of rotating disks.

Padlock - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Padlock

1 of 4 3/11/2015 1:15 PM