Luggage locks

Whitchurch Lock is a lock and weir situated on the River Thames in England. The lock is located in the Oxfordshire village of Whitchurch-on-Thames but the weir crosses the river to the Berkshire village of Pangbourne. Both lock and weir are owned and managed by the Environment Agency.

The long serving lock keeper is Brian Butcher who has worked on the river for more than forty years starting as an apprentice engineer for Bert Bushnell’s hire fleet based in Maidenhead in the 1960s.

Access to the lock

Whitchurch Lock is one of the few locks on the River Thames which has no public access other than by boat.

Reach above the lock

The reach passes along the Chiltern Hills, culminating in Goring Gap. On the Oxfordshire side are Hartslock beech woods, named after a lock that was removed in 1910. On the Berksire side is Child Beale Wildlife Park. The Thames Path crosses Whitchurch Bridge into Oxfordshire and continues through Whitchurch away from the river as it goes round Coombe Park, returning to the river at Hartslock. It continues on the Oxfordshire river bank to Goring.

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The Windsor Locks, Connecticut tornado struck on October 3 1979. The short-lived, but intense F4 tornado (see Fujita scale) caused 3 deaths, 500 injuries, and - with more than $300 million in property damage along an 11-mile path - ranks as one of the most expensively destructive tornadoes in American history.

The tornado touched down in the town of Poquonock, Connecticut, just north of Hartford, Connecticut in the Connecticut River valley. It traveled north through the town of Windsor Locks, Connecticut before dissipating in the town of Suffield, Connecticut, just south of the Massachusetts state line.

The path of the tornado crossed the northern portion of Bradley International Airport, and many vintage aircraft at the nearby New England Air Museum were damaged or destroyed by the storm.

Backpacking may refer to:

• Backpacking (wilderness), hiking or camping overnight in the wilderness
• Backpacking (travel), low-cost, generally urban, travel with minimal luggage and frugal accommodations
• Ultralight backpacking, backpacking while carrying very few or very light supplies
• Backpacking in Canada, travel backpacking in Canada

A lock puzzle is a type of mechanical puzzle. It consists of a lock with unusual or hidden mechanics. Such locks are sometimes called trick locks, because opening them is like performing a magic trick. A matching key may or may not be used in this trick.

Lock puzzles have a long history.

Chinese jewelry boxes often contain trick locks and hidden drawers. An example of such a box is an integral part of the plot of the movie Shanghai Knights. Clive Barker has written a number of horror stories (including The Hellbound Heart, which was made into the movie Hellraiser) centered around Lemarchand’s box which appears to be such a puzzle box but in fact opens the gates to Hell when manipulated.

Other lock puzzles stem from the necessity to invent secure locks in the Middle Ages.

Lock puzzles are closely related to puzzle boxes.

Zero Halliburton was originally a metal fabrication company called Zierold Company, which in 1946 changed its name to Zero Corporation. In 1952 Zero, which until then had no relation to Halliburton, bought the luggage division of Halliburton, the Texas oilfield services company. On December 29, 2006, Zero Corporation sold its consumer division to ACE Co. Ltd., a Japanese luggage manufacturer. Today Zero Halliburton is a wholly owned subsidiary of ACE Co. Ltd. of Osaka and Tokyo.

Erle P. Halliburton, the founder of Halliburton, had commissioned the aluminum case in 1938 from aircraft engineers because other luggage could not endure the rough travel through Texas oil fields in a pickup truck. In addition to being more durable than a leather or cloth case due to its rigidity, the aluminum case seals tightly against dust and water.

Today the aluminum cases, which have appeared in over 200 Hollywood movies, are also available in carbon-fiber. They have been seen in wrestling as well - in one ‘angle’, Steve McMichael turned on fellow NFL’er Kevin Greene for a Halliburton stuffed with cash and a 4 Horsemen t-shirt. McMichael used the case to ensure victory several times. Although lighter, the carbon-fiber briefcases cost about $2000 USD, about seven times the cost of the standard aluminum Zero Halliburton briefcases. Famously, the Nuclear Football (the briefcase used to order a nuclear attack) is a modified Zero Halliburton case.

Locks Heath F.C. is a football club based in Fareham suburb of Locks Heath, Hampshire, England. They won the Hampshire League title in 1991. Currently, they are members of the Hampshire Premier League Division One. They play their home games at The Recreation Ground, found on Hunts Pond Road. They play in red and black shirts

A skeleton key is a key that has been filed in such a way as to bypass the security measures placed inside a warded lock. Today, this is also known as a bump key.

A Skeleteon Key can also be used as a key that opens every lock in a house

The term skeleton key is also often misused to describe ‘bit’ type keys.

This misnomer, perhaps, stemmed from its resemblance to a skeletal figure, with an open loop at its end distal to the lock into which it is inserted to open, and possessed of two or more teeth, projecting as perpendicular tusks off the slender shaft attached to the loop, with interstitial spaces approximating the width of each tooth, to engage the tumblers of the lock when inserted. The hole of it is most resemblant of a lion’s shape in certain medieval heraldry, and likely draws its origin from same or vice versa. The lock’s hole into which the skeleton key is inserted is fashioned in the shape of a circle at the top, with flared lines projecting down from it to form the sides of an isosceles triangle, the circle at the top then circumscribing the triangle at about one-third the vertical length of the two sides.

These keys were common in both cabinetry and door locks in early Colonial America and remained in common usage within the United States through the 1940’s, giving way after World War II to the more common house-key locks in use today, as manufactured by Schlage and others. It was uncommon to see skeleton keys and their locks formed of materials other than brass, although pewter was sometimes used as well. Most usually, skeleton keys today are associated with fine cabinetry, not other types of locks; they are insecure locks, not being capable of being ground to unique shapes to form a unique key pattern. Their common usage in earlier times therefore conveys the notion of less need for security than preoccupies the world today and since World War II, generally.

A joint lock is a grappling technique involving manipulation of an opponent’s joints in such a way that the joints reach their maximal degree of motion.

In budo these are referred to as, 関節技 kansetsu-waza, “joint locking technique”Ohlenkamp, Neil. Classification of Techniques in Kodokan Judo. judoinfo.com. Accessed February 26 2006.) and in Chinese martial arts as Chin na su which literally means “technique of catching and locking”.

These typically involve isolating a particular joint, and leveraging it in an attempt to force the joint to move past its normal range of motion. Joint locks usually involve varying degrees of pain in the joints, and if applied forcefully and/or suddenly, may cause injury, such as muscle, tendon and ligament damage, even dislocation, or bone fractures.

Joint locks can be divided into five general types according to which section of the body they affect:

• Armlocks
• Leglocks
• Small joint manipulation
• Spinal locks
• Wristlocks

These general types can be further divided into subtypes according to which specific joint(s) they affect, or the type of motion they involve.

Usage

Joint locks are commonly featured in all forms of grappling, whether it be in martial arts, self-defense, combat sport or hand to hand combat application. The variants involving lesser leverage on a smaller joint (such as wristlocks) are often featured in law-enforcement or self-defense application, where they are used as pain compliance holds. Joint locks that involve full body leverage can on the other hand be used in hand to hand combat to partially or fully disable an opponent, by tearing major joints such as knees or elbows.

Common martial arts featuring joint locks include Aikido, Brazilian Jiu-Jitsu, Catch Wrestling, Hapkido, Jiu-Jitsu, Judo, Ninjutsu and mixed martial arts. They are usually practiced in a maximally safe manner, with controlled movements, and releasing the joint lock once it is apparent that it has been effectively applied. In combat sports, joint locks are used as submission holds, and are intended to force the opponent to submit; the lock will be controlled and held until an opponent submits or a referee recognizes the threat of injury and intervenes. The types of joint locks allowed in competitions featuring them varies according to the perceived danger in their application. Armlocks are generally considered safer, while small joint manipulation and spinal locks are banned in nearly all combat sports.

A deadbolt is a special kind of locking mechanism, providing more security than an ordinary key-operated lock because the weight of the locking bar is usually sufficient to increase break-in time to 10 or 15 minutes.

Unlike most spring-bolt locks, in which the bolt is held in place only by the pressure of a spring and can easily be retracted, a deadbolt lock cannot be opened except by rotating the lock cylinder.

A variant of the standard deadbolt is the vertical deadbolt, which generally rests on top of a door. Vertical deadbolts resist jimmying (in which an intruder inserts a pry bar between the door and the frame and tries to pry the bolt out of the jamb).

Security Features

Many designs are available from manufacturers. Various manufacturers have patented designs offering unique solutions to prevent the locks from being defeated by picking, lock bumping prying, and other forceful attacks.

Record locking is the technique of preventing simultaneous access to data in a database, to prevent inconsistent results.

The classic example is demonstrated by two bank clerks attempting to update the same bank account for two different transactions. Clerk 1 and clerk 2 both retrieve (ie, copy) the account’s current balance. Clerk 1 applies one transaction and refiles the new balance. Clerk 2 applies a different transaction and refiles a new balance that obliterates the information saved by clerk 1. The resulting account balance no longer reflects the first transaction.

To prevent inconsistencies created by that kind of unlimited access, the account’s record can instead be immediately locked upon being retrieved for any subsequent update. Anyone attempting to retrieve the same record for editing is denied access because of the lock (although, depending on the implementation, they may be able to view the record without editing it). Once the record is saved or edits are canceled, the lock is released, thereby always insuring consistent data within the record being edited.

Use of locks

Record locks (hereafter lock(s)) need to be managed between the entities requesting the records such that no entity is given too much service via successive grants, and no other entity is effectively locked out. Care should also be used to avoid a deadlock condition which can bring the application or system to a halt. The entities that request a lock can be either individual applications (programs) or an entire processor.

The application or system should be designed such that any lock is held for the shortest amount of time possible. Given that there may be considerable overhead to the process of requesting, and subsequent granting of a lock, it may make sense to investigate if an entity can forego a lock if the purpose is simply to read non-critical data.

There are two main types of locks that can be requested:

Exclusive locks

Exclusive locks are as the name implies, exclusively held by a single entity. If the locking schema was represented by a list, the holder list would contain only one entry. Since this type of lock effectively blocks any other entity that requires the lock from processing, care must be used to:

• Ensure the lock is held for the least amount of time possible
• Do not hold the lock across system/function calls where the entity is no longer running on the processor - this can lead to deadlock
• Ensure that if the entity is unexpectedly exited for any reason, the lock is freed otherwise deadlock will likely occur.

Non-holders of the lock (aka waiters) should perhaps be maintained in a list that is serviced in a round robin fashion. This would ensure that any possible waiter would get equal chance to obtain the lock and not be locked out. To further speed up the process, if an entity has gone to sleep waiting for a lock, performance is improved if the entity is notified of the grant, instead of discovering it on some sort of system timeout driven wakeup.