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Topic: Lever tumbler lock

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Lock (device)

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	Locks and Keys Part IV, Padlocks : anvilfire iForge Demo
		This is a simple arrangement where the spring or a lever actuated by a spring latches the lock and a key simply pushes the spring to open the lock.
		In this lock the spring is a thin piece held in place by its fit in the lock case.
		When they are rotated clockwise far enough for the post on the locking lever to move in the slot the key should contact the dog-legged lever and lift the locking lever.
	www.anvilfire.com /iForge/tutor/jd_locks/index4.htm (1634 words)

	Locks - Hanna Homeschooling (Site not responding. Last check: 2007-10-16)
		The wafer lock, also known as a disk tumbler lock, uses the same principal as the pin tumbler lock: objects inside the lock must be properly aligned before the plug can rotate.
		One of the main differences between wafer tumbler and pin tumbler locks is that the wafers can obstruct the movement of the plug by being moved too low or too high, while the pins can only be moved too far up.
		The lock will not open of course (unless you are very lucky, and have come across a careless tenant, in which case you can skip the whole lock picking process), but it will turn the plug a very slight amount.
	www.hanna-homeschooling.com /locks.html (2936 words)

	Lock Picking for Lock Makers : Oldlocks.com
		One method that was used to make lever tumbler locks more difficult to pick was a series of teeth, like saw teeth on the end of the levers and on the matching face of the post.
		A well made custom lever tumbler lock that combines warding and keyhole protection along with the increased security of a system of wards would be a very good lock in the modern world.
		To reset the detector the levers must be properly aligned as in unlocking and the bolt's post B thrown into the over travel notch at I. This lifts the detector spring at F via the ramp on the bolt, thus releasing the detector.
	www.oldlocks.com /lockpicking.htm (1886 words)

	Notes on Picking Pin Tumbler Locks
		In an ideal lock, all of the pin holes in the plug would be in perfect alignment with the corresponding holes in the shell, the centerline of the plug would be exactly parallel to that of the shell, and all of the pins would be exactly the same diameter.
		These locks are no more or less inherently secure than standard pin tumbler locks, although the external exposure of their pins makes picking them (and designing sophisticated picking tools for them) somewhat simpler.
		Although combination lock manipulation exploits some of the same kinds of imperfections as pin tumbler lock picking, the principles and techniques are quite different and are well beyond the scope of this document.
	www.crypto.com /papers/notes/picking (10032 words)

	history of locks new york queens locks locksmith 24 hour emergency
		The oldest example of a mechanically lock was found among the ruins of the palace of Khorasabad in Niveveh.
		The tumbler, a lever that falls into a slot in the bolt, preventing any movement, until picked up by the key to the height of the slot.
		Most of the locks now in use are variations of the models produce in the 1800's: warded locks, lever tumbler locks and pin tumbler locks.
	www.queensnewyork.com /history/locks.htm (887 words)

	[No title]
		Lever locks, though limited in use, can still be found today in some hospitals, suitcases, cabinets, fine furniture, and attache cases.
		Lever locks are also used on safe-deposit boxes, often with fifteen or more levers and sometimes requiring two keys.
		To pick a lever lock requires that tension be placed against the deadbolt throughout the course of lifting one or more levers within the lock to the required alignment with the post.
	www.etext.org /CuD/Inform/inform-5 (7410 words)

	[No title]
		When the lock is locked, there is a curved piece of metal wedged inside the little notch on the horseshoe shaped bar that is pushed in to the lock when you lock it.
		Here the lever is moved to varying heights against a spring by a key, and then the bolt stump is free to be pushed through the aligned slots in the interior of levers from one cutout area to another.
		In a closing note for lever locks, let me just add that often you will come to what appears to be a small lever lock which is in actuality, merely a warded lock with a spring retainer that must be lifted before the bolt can be moved.
	www.textfiles.com /anarchy/LOCKPICKING/sanlock.txt (4715 words)

	TUMBLER - Definition
		[n] a movable obstruction in a lock that must be adjusted to a given position (as by a key) before the bolt can be thrown
		One who tumbles; one who plays tricks by various motions of the body; an acrobat.
		A movable obstruction in a lock, consisting of a lever, latch, wheel, slide, or the like, which must be adjusted to a particular position by a key or other means before the bolt can be thrown in locking or unlocking.
	www.hyperdictionary.com /dictionary/tumbler (235 words)

	Complete Guide to Lock Picking $14.95 (Site not responding. Last check: 2007-10-16)
		This complete illustrated manual covers lock picking techniques thoroughly, in an easy-to-understand manner.
		Common locations where disc tumbler* locks are found.
		The Complete Guide To Lock Picking is the very best book ever written on lock picking, and we are proud to offer it to our customers.
	www.fsbookco.com /COMPLETEGUIDETOLOCK.html (117 words)

	New Page 3
		Greeks and Romans refined the lock until the keys became the size that we are use to today.
		The degree of security is a function of the number of levers and the tension under which the lever are under…it is pickable.
		Safe locks are generally not opened by manipulation, it is faster to use lock pullers, core drillers, burning bars, and other ways to defeat such locks.
	pegasus.cc.ucf.edu /~cjreg/psalocks.htm (1276 words)

	writer (Site not responding. Last check: 2007-10-16)
		While locks of the day were made on special order, they could be expensive, not to say inconvenient to the lord or lady who had to carry around ten keys.
		The lock is fourteen inches long and bears the coats of arms of Henry VII and Henry VIII.
		Should a false key be inserted and raise the levers too high, the lever would be trapped in the upheld position, allowing the person with the real key to know immediately that his lock had been tampered with.
	www.romantictimes.com /g_writer/g7a_22.html (666 words)

	Professional Locksmithing \| Education Direct Distance Learning
		Construction and operation of warded locks, lever locks, disk tumbler locks, and pin tumbler locks; padlock construction and operation; how combination locks work.
		The mortise lock and the rib lock; operation of key-in-knob locks and tubular deadbolts; installation steps for key-in-knob locks, deadbolts, rim locks, and other door locks.
		Basic auto lock mechanisms; replacing lock cylinders in doors, ignitions, and trunks; troubleshooting of and servicing of auto lock cylinders; electronic security devices for auto protection.
	www.educationdirect.com /locksmith/ProgramOutline.html (521 words)

	Amazon.com: Books: Complete Guide to Lock Picking (Site not responding. Last check: 2007-10-16)
		Most books of this type open with a brief history of locks; what the Romans did, the Chubb lever lock, who invented the Yale lock (three guesses), and so on.
		You really have to have an actual lock and tools in front of you in order to follow what he says.
		For amateurs who are just interested in lock picking as a past time, this book is pretty good as it covers the normal locks that you will encounter in everyday life- pin tumblers, wafers and others, just the normal ones though.
	www.amazon.com /exec/obidos/tg/detail/-/0915179067?v=glance (1079 words)

	LIST Council Peer Review Terms List
		pertaining to a lever tumbler whose gate is pierced into the body of the tumbler.
		The lock case is installed in a pocket in the door or drawer v.
		The locking mechanism is a set of rotating disc tumblers which engage notches in the cast shackle and may be rotated by the angled cuts cast on the key.
	www.mfsales.com /release.html (5490 words)

	CSF Products - Lock Picks
		Basic lock design, lock picking, improvised lock picks, handcuffs, warded locks, pin tumbler locks, snap picks, pick guns, rapping, rocker picks, picks for tubular locks.
		Basic lock picking, concepts behind lock picking, picking procedure, tool design, common picking techniques.
		Surreptitious entry, forced entrances, Lock picking: doors, filing cabinets, desks, windows, Ward locks, disc tumbler locks, lever tumbler desk lock, pin tumbler locks, mushroom tumbler locks, making tools, skeleton keys, safes and manipulation.
	www.wvguns.com /products_lockpicks.htm (184 words)

	LSS+ MASTER EXHIBIT LISTING
		Examination of a lock and marks that are visible.
		LSS204: Brian Chan on the disassembly of a lock and derivation of the TMK
		Forensic implications of the bypass of lever locks.
	www.security.org /lss-tour/master_exhibit.htm (7267 words)

	Wholesome Communication--A Key to a Good Marriage - Jehovah's Witnesses Official Web Site
		In 1778, Robert Barron patented a double-acting, lever-tumbler lock that remains the basis of the modern key lock.
		His design called for the use of a single key capable of raising the lock's two tumblers together.
		SIMILARLY, a successful marriage depends on a husband and wife working together in unison.
	www.watchtower.org /library/w/1999/7/15a/article_01.htm (1081 words)

	Directors
		Chapter One, The Lock Companies of Terryville, CT Lewis McKee and Co.
		Chapter Three, The Lock Companies of New Britain, CT Stanley Co.
		Chapter Four, The Lock Companies of New Heaven, CT Blake Bros. Co.
	www.lockmuseum.com /hennessy.htm (35 words)

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