Notes on Picking Pin Tumbler Locks > 자유게시판

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We come into the present. And then we’ll come back to the real business of this gathering within that time. So, you see, what is billiards we’re always passing the buck and don’t realize that the past is caused by the present as the wake of a ship flows back from the prow. Because, you see, I seem to be pitching it to you as if it were something good for you, as if it would give you a better future, as if it would improve you. Civilization suffers easily from too much of a good thing. Scour the whole thing with nuclear energy. So a star eventually cools off or throws out some garbage that spins around, becomes planets, and that develops all this corrupt life on it which gets brainy, and thinks up all sorts of things, and finally discovers the secret of nuclear energy and then blows itself up, and it becomes a star. Most of you may be, or many of you may be, familiar with this one-which you can pick up, again, very quickly.

If you can pick all (or at least most) of the locks on this board, you are well prepared against the typical locks installed in residential and commercial buildings in the US. The lock mechanism can open when the notches on the disks are lined up at a particular rotation. While many of the principles of pin tumbler lock picking apply or can be adapted to other mechanical lock designs, a complete discussion of these locks and techniques for defeating them is beyond the scope of this document. If serrated bottom pins are used as well (as they are in, e.g., certain American brand padlocks), snap guns, bump keys, or sawtooth raking are likely the only picking techniques that will succeed, especially for the novice. A popular style of tool for these locks decodes them via impressioning techniques. Making keys for these locks often requires the use of special equipment and unusual, proprietary key blanks. The Architecture and Design Awards go to those establishments with the most unusual, innovative and beautiful poolroom aesthetics. The design is based on the late 18th century British Bramah lock (still in production and use today). Master keying does not introduce any significant complications for lock picking.

Picking locks with spool and mushroom pins takes practice, both to recognize them and to effectively neutralize them when they are encountered. Snap guns are occasionally successful as well. However, because they jam when false set, locks with serrated pins tend to impression very well (impressioning is a decoding technique that produces a working key based on marks left on a progressively cut key blank). The commercial lever lock mechanism dates back to the early 19th century Chubb lock (and, indeed, to well before). Just as you can’t have a front without having a back. Not, again, that thinking is something bad, but you have to stop thinking at certain times. You’ll be thinking of something else. Many inexpensive locks, especially low-security "cam" locks such as those used to secure furniture and cabinets, do not use pin stacks for their tumblers. Mechanical combination locks are common on inexpensive padlocks, safe locks, and to control access to high security vaults. The most common security pins are the "spool" and "mushroom" top pin designs, which are thinner in their mid-section. Many dimple key locks also incorporate secondary high security locking mechanisms. These locks must be picked at both the top and the bottom, sometimes alternating between them.

If only serrated top pins are used, reverse picking may be successful. But before we go into that, I just want to know if there are any questions; if I’ve made myself clear, and if there are any of you who find me utterly unintelligible? In fact, master keyed pin stacks are easier to pick than those that are single-keyed; there are two chances to lift a cut to the shear line. To determine which pin stacks have these pins, gently push up each "set" pin. While pins are usually set by raising the cut from the plug to the shear line, they can also be picked by first oversetting the cut to within the shell and then lowering it to the shear line. Instead, they use flat "wafers," typically extending across the full height of the plug. The sidebar must engage these grooves in order to retract and allow plug rotation. The Primus sidebar is keyed by additional side tumblers that engage a secondary bitting cut into the side of the key.