Iron key dating

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The ideas and development of the principals of what actually made a lock secure began to appear from the early 1750s and culminating in the great lock picking challenges of the 1850s. At the same time fixed wards and tumblers were the norm.

The humble ward had been presented in every way imaginable, and in every quality.

In an effort to further enhance these fixed obstructions all sorts of secondary devices were added to locks to back up a security principal that could never offer any great security.

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First models of wooden keys and locks originate from Ancient Egypt, where they first managed to take advantage from the technique of falling pins to control the movement of the security bolt.

The bolt could be freed from locked position by inserting large and cumbersome wooden key into the lock, and manually lifting it upwards, displacing the pins that were held down by gravity.

Invented about 1792 and were still made at the end of the Victorian period. This class of key was a utility item common throughout the 18th/19th century, although specimens with a lose ring bow exist back to roman times. Once turned in the lock the ring bow could be used to pull the door open and then left in the lock where the ring would lie flat against the door and wouldn't be a danger to people, or to animals when used in rural applications such as stables etc., in much the same way as some modern office furniture keys are hinged to prevent injury and snagging.

The Georgian to Victorian period was pivotal in so many areas of English social and industrial life, especially so, as far as locks and keys were concerned.

The object is entirely covered in corrosion products, and the undisrupted state of this thick coating may suggest the form of the object to be well preserved. The stem is badly corroded, but is essentially sub-circular in cross-section and has a projecting tip beyond the bit. At the opposite terminal the bit is formed of two downwards pointing projections, rectangular in cross-section, both of which terminate in worn breaks. The key has a 'D' shaped' bow at the end of the circular cross sectioned stem. The bit has two projections in the form of rectangular uncrossed G shapes facing each other. The bit of the key, which is broken, extends at right angles from the shaft. Further fragments of teeth were found in association with this object. The attachment loop has an external diameter of 22mm. A large iron key, probably dating from the Medieval period, AD1400 - 1550. Similar keys, attributed to the fifteenth and early sixteenth centuries, are illustrated in Wheeler, 1940, London Museum Medieval Catalogue, page 135, number 7B, and again in plate XXXI of the same catalogue, numbers… This key weighs 83.29g, has a length of 138.4mm, maximum thickness of 12.5mm and height of 55.4mm.

The shank tapers from the loop to the bit, which is curved to a near right-angle from the shank.

There are three upright rectangular bits projecting from the shank bit, all of which show signs of use. Similar examples are illustrated in Ward-Perkins (199 figure 45). A complete Post Medieval iron key dating to the 16th century.

Many variations of this kind of key have been found in archeological digs in Greece and elsewhere. Used with combination locks to hamper attempts to open it without the correct combination. A bar can be placed in two brackets attached to the door or on both sides of it, then slid back and forth, or into a recess in the wall. The front edge often has an eyelet closure that can be padlocked. The modern bicycle with chain-operated gears and air-filled tires was conceived and developed in the 1880s, and was fitted with a lock almost from the start. There are also scanners for personal codes, fingerprints, voice or retinal patterns. A method of decoration in which grooves are cut into a metal (or wood) surface with a sharp cutting tool called a burin or graver. Usually a forged key for a wooden sliding-bolt lock. However, in public places only trained locksmiths on duty are allowed to carry picks. Masterpieces were given three stamps on passing inspection. In and around it were over 200 smith’s tools and iron objects. These locks open and close via a key with a long, narrow bit at a right angle to the shaft (latch-lifter), which is inserted into a hole above the bolt and turned. In the Middle Ages, fines were the most common punishment for theft, and one that was not considered dishonorable. A type of padlock with ward springs and a screw mechanism that compresses the springs. The key is small, thin and easy to carry in a pocket or key case.

Can consist of buttons or bars that must be positioned before the rings in the lock can be turned. Locking a door with a beam is the oldest locking principle and was invented along with the door. The earliest locks consisted of a chain and a lock with a key. Padlock with a chain to protect valuable, handwritten books in Cloisters from theft in the Middle Ages. The electronic code is read by the scanner, processed by the control unit, which checks it against the preprogrammed code and then sends a signal to the motor-powered bolt or latch, electromagnetic bolt or handle, or electronically controlled striking plate. There is no raised edge, as there would be with impressing. These locks open and close via a key with a long, narrow bit at a right angle to the shaft (latch-lifter), which is inserted into a hole above the bolt and turned. The first time lock picks and unpickable locks are mentioned in connection with Swedish locks is in the marketing of Christoffer Polhem’s padlocks, called Polhem or Scandinavian locks. Often they went on to be included as works of art in fancy armories or curio collections. A thin lock housing that is inserted and fastened in an opening (mortise) in the front edge of the door. The key bit moves the bolt using the notches, pins or holes on the bolt. Many local smiths in the Swedish province of Dalarna made special iron “pull locks” for storehouses and lofts. More severe cases could be punishable by flogging, the cutting off of one or both ears or a hand, or death by hanging. The safety of these locks has increased from the original four pins to today’s seven.

The key has a D-sectioned, heart-shaped loop, with a knop on the point of the heart.

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