Extruded padlocks in Visual Studio .NET

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Extruded padlocks
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Extruded locks are made from a single piece of metal, usually brass. You will need the following tools to service these locks:
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Small nail with the point cut off Key blanks Pliers Small punch Hammer Small light (overhead lights are too bright; a flashlight is acceptable)
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To disassemble the extruded lock, first locate the plug pins or cover on the bottom of the case. Since the case is highly polished, this is sometimes hard to do. Tilting the lock under the light will show a faint outline of the cover cap or plug pins. To assemble extruded locks held together by exposed pins, follow this procedure: 1. Determine the diameter of the plug pins. 2. Select a drill bit smaller than the diameter of the pin. 3. Drill slowly and only a fraction of an inch deep the pin does not extend very far into the lock. If you drill through it, you can damage the spring. 4. Extract the plug. 5. Remove each spring and pin. 6. Remove the cylinder. The cylinder is held by a pin that may be covered by a small pin plug. Rapping the lock against a hard surface may shock the plug loose. If not, dislodge the pin plug with a small screwdriver. 7. Make the necessary repairs. 8. Assemble the lock. 9. Fill the pin holes with brass wire. 10. File the wire flush with the case and polish. Extruded locks with a retaining plate over the pins require a slightly different procedure. If the lock is open, drive the plate out with a punch inserted at the shackle hole. If it is locked, follow this procedure: 1. Drill a small hole in the plate off-center. 2. Using an ice pick or other sharp instrument, drive the plate down toward the shackle. This will buckle the plate and cause the edges to rise. 3. Pry the plate loose by working a sharp instrument around the edges. 4. If the plate is not severely damaged, it can be reused. Bow the plate slightly so that the center bulges outward when the plate is installed. 5. Peen the edges of the plate to form a tight seam. Other locks mount the plug and cylinder by means of horizontal pins running across the width of the lock. These pins can be seen under strong light.
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Key fitting for pin tumbler padlocks
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Follow this procedure: 1. Insert the blank into the plug. 2. Place the No. 1 pin in its chamber.
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3. Using a blunted nail as a punch, drive the pin into the blank. A single light hammer tap is enough to impression the blank. 4. Remove the blank. 5. File the blank at the impression. 6. Insert the key and try to turn the cylinder. File as necessary. 7. Move to the next pin and repeat the process. Major Padlock Manufacturers and Their Products
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All American (Junkunc Brothers) padlocks share the same patented locking device two hardened steel balls fitting into grooves in the shackles. This arrangement is one of the best ever devised. Applying force on the shackle wedges the balls tighter. The H10 model, for example, requires more than 5000 pounds to force; test locks have been stressed to 6000 pounds and still worked. All H10 locks use a 10-blade tumbler. (The exceptions to these statements are those locks with a deadlock feature. The key must be turned to lock the shackle. These padlocks are made on an entirely different principle and are not discussed here.) American padlocks have a removable cylinder that simplifies servicing. If a customer wants keyed-alike locks, the modification takes only a few minutes. Locksmiths can also key-alike different models. These locks have three basic subassemblies: cylinder assembly, locking mechanism assembly, and the shackle assembly.
Cylinder removal and installation. Follow this procedure:
1. Open the lock, exposing the retaining screw at the base of the shackle hole. 2. Remove the retaining screw (I in Fig. 12.5). If the screw is stubborn, use penetrating oil and let it set a few moments before attempting to turn the retaining screw. 3. Strike the side of the lock with a leather mallet. The purpose is to force the retaining pin (C) into the space vacated by the retaining screw. Referring to the drawing, note how the pin retains the cylinder in the slot shown. 4. Withdraw the key together with the cylinder. Place a new cylinder in the case. 5. Assemble the lock in the reverse order of disassembly. Note: The H10 series uses a plated silver cap dimensionally identical to the brass caps on the other models.
The locking mechanism. The brass retainer is the heart of the assembly (E in Fig. 12.5). Retainers vary in size according to the lock model. A30 and AC20
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