http://spiralbound.net/2005/10/05/mit-guide-to-lock-picking-chapter-4-basic-picking-the-binding-defect my digital notebook Mon, 26 Jul 2010 13:44:48 +0000 hourly 1 http://wordpress.org/?v=3.0 http://spiralbound.net/2005/10/05/mit-guide-to-lock-picking-chapter-4-basic-picking-the-binding-defect#comment-168 spiralbound.net » MIT Guide to Lock Picking - Chapter 9: Recognizing and Exploiting Personalit Traits Fri, 14 Oct 2005 15:40:35 +0000 http://spiralbound.net/?p=96#comment-168 [...] A general trick that lock makers use to make picking harder is to modify the shape of the driver pin. The most popular shapes are mushroom, spool and serrated, see Figure 9.7. The purpose of these shapes is to cause the pins to false set low. These drivers stop a picking technique called vibration picking (see section 9.12), but they only slightly complicate scrubbing and one-pin-at-a-time picking (see chapter 4). [...] [...] A general trick that lock makers use to make picking harder is to modify the shape of the driver pin. The most popular shapes are mushroom, spool and serrated, see Figure 9.7. The purpose of these shapes is to cause the pins to false set low. These drivers stop a picking technique called vibration picking (see section 9.12), but they only slightly complicate scrubbing and one-pin-at-a-time picking (see chapter 4). [...]

]]> http://spiralbound.net/2005/10/05/mit-guide-to-lock-picking-chapter-4-basic-picking-the-binding-defect#comment-152 spiralbound.net » MIT Guide to Lock Picking - Chapter 6: Basic Scrubbing Sat, 08 Oct 2005 17:31:41 +0000 http://spiralbound.net/?p=96#comment-152 [...] The slow step in basic picking (chapter 4) is locating the pin which is binding the most. The force diagram (Figure 5.5) developed in chapter 5 suggests a fast way to select th correct pin to lift. Assume that all the pins could be characterized by the same force diagram. That is, assume that theyall bind at once and that they allencounter the same friction. Now consider the effect of running the pick over all the pins with a pressure that is great enough to overcome the spring and friction forces but not great enough to overcome the collision force of the key pin hitting the hull. Any pressure that is above the flat portion of the force graph and below the top of the peak will work. As the pick passes over a pin, the pin will rise until it hits the hull, but it will not enter the hull. See Figure 5.3. The collision force at the sheer line resists the pressure of the pick, so the pick rides over the pin without pressing it into the hull. If the proper torque is being applied, the plug will rotate slightly. As the pick leaves the pin, the key pin will fall back to its initial position, but the driver pin will catch on the edge of the plug and stay above the sheer line. See Figure 6.1. In theory one stroke of the pick over the pins will cause the lock to open. [...] [...] The slow step in basic picking (chapter 4) is locating the pin which is binding the most. The force diagram (Figure 5.5) developed in chapter 5 suggests a fast way to select th correct pin to lift. Assume that all the pins could be characterized by the same force diagram. That is, assume that theyall bind at once and that they allencounter the same friction. Now consider the effect of running the pick over all the pins with a pressure that is great enough to overcome the spring and friction forces but not great enough to overcome the collision force of the key pin hitting the hull. Any pressure that is above the flat portion of the force graph and below the top of the peak will work. As the pick passes over a pin, the pin will rise until it hits the hull, but it will not enter the hull. See Figure 5.3. The collision force at the sheer line resists the pressure of the pick, so the pick rides over the pin without pressing it into the hull. If the proper torque is being applied, the plug will rotate slightly. As the pick leaves the pin, the key pin will fall back to its initial position, but the driver pin will catch on the edge of the plug and stay above the sheer line. See Figure 6.1. In theory one stroke of the pick over the pins will cause the lock to open. [...]

]]> http://spiralbound.net/2005/10/05/mit-guide-to-lock-picking-chapter-4-basic-picking-the-binding-defect#comment-148 spiralbound.net » MIT Guide to Lock Picking - Chapter 5: The Pin Column Model Fri, 07 Oct 2005 13:03:25 +0000 http://spiralbound.net/?p=96#comment-148 [...] Back to Index > Chapter 4 > Chapter 6 > [...] [...] Back to Index > Chapter 4 > Chapter 6 > [...]

]]> http://spiralbound.net/2005/10/05/mit-guide-to-lock-picking-chapter-4-basic-picking-the-binding-defect#comment-140 spiralbound.net » MIT Guide to Lock Picking - Chapter 3: The Flatland Model Wed, 05 Oct 2005 12:37:46 +0000 http://spiralbound.net/?p=96#comment-140 [...] In order to become good at picking locks, you will need a detailed understanding of how locks works and what happens as it is picked. This document uses two models to help you understand the behavior of locks. This chapter presents a model that highlights interactions between pin positions. Chapter 4 uses this model to explain how picking works. Chapter 9 will use this model to explain complicated mechanical defects. [...] [...] In order to become good at picking locks, you will need a detailed understanding of how locks works and what happens as it is picked. This document uses two models to help you understand the behavior of locks. This chapter presents a model that highlights interactions between pin positions. Chapter 4 uses this model to explain how picking works. Chapter 9 will use this model to explain complicated mechanical defects. [...]

]]> http://spiralbound.net/2005/10/05/mit-guide-to-lock-picking-chapter-4-basic-picking-the-binding-defect#comment-139 spiralbound.net » MIT Guide to Lock Picking - Table Of Contents Wed, 05 Oct 2005 12:36:46 +0000 http://spiralbound.net/?p=96#comment-139 [...] 4 Basic Picking & The Binding Defect [...] [...] 4 Basic Picking & The Binding Defect [...]

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