达德利密码锁的工作原理

Dudley locks have three code-wheels inside them. When you pull up on the shackle, the latch presses into the stack of wheels. Each wheel has a deep notch in it (real gate). If the notches are lined up together at the right place, the latch is able to move in, and the lock can open. Also note that the front wheel is at the very front of the pack, and attached to the dial.

达德利（Dudley）密码锁内部有三个代码轮盘。当你向上提拉锁梁时，锁闩会压向这组轮盘。每个轮盘上都有一个深凹槽（即“真门”）。如果这些凹槽在正确的位置对齐，锁闩就能嵌入其中，锁便随之打开。另外请注意，前轮位于轮组的最前端，并与刻度盘直接相连。

The two rear wheels (corresponding to the first and second numbers of the combination) have two false gates, notches that are not deep enough to allow the lock to open. The front wheel has 9 false gates (making 10 total gates).

两个后轮（对应密码的第一和第二个数字）各有两处“假门”——即深度不足以让锁开启的浅槽。前轮则有 9 个假门（总计 10 个槽口）。

If the rear wheel is aligned so that the latch fits into a gate (real or false), then pulling the shackle up will make the latch press into the second wheel, making it difficult to move/manipulate. If both of the first wheels are aligned, then the front wheel will be difficult to move.

如果后轮对齐，使锁闩卡入其中一个槽口（无论是真门还是假门），那么向上提拉锁梁会使锁闩压向第二个轮盘，从而导致其难以转动或操作。如果前两个轮盘都已对齐，那么前轮（即与拨盘相连的那个）也将变得难以转动。

We can use this fact to quickly locate all the gates。

我们可以利用这一点快速找到所有凹槽的位置。

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I. Finding the First Number (确定第一个数字：复位与初步探测)

a. Pick a number to start with, say 0. Spin the dial clockwise at least twice to pick up all the wheels (reset), and point it at 0.
选择一个起始点，比如 0。顺时针转动拨盘至少两圈以带动所有轮盘（复位），最后停在 0 的位置。

b. Spin the dial counterclockwise to at least past 6 notches (until you feel the drive pin pick up the second wheel). Pull the shackle up and try to move the dial farther CCW. If it feels "scratchy", the wheel is in a gate. If it moves freely, 0 is not the right start.
逆时针转动拨盘至少越过 6 个刻度单位（即直到你感觉到驱动销带动了第二个轮盘）。向上提拉锁梁，并尝试继续逆时针转动。如果感觉有“磨擦感”，说明轮盘正处于槽口中。如果转动非常顺畅，说明起始位置不对。

c. Release the shackle and spin the dial CW, moving it 3 notches forward.
松开锁梁，顺时针转动拨盘，向后移动约 3 个刻度单位。

d. Repeat (b)-(c), adding 3 notches to your starting position each time, until you find a gate. This is your first number (50% probability).
重复步骤 (b) 到 (c)，每次顺时针增加 3 个刻度的位移作为新的起始点，直到找到槽口。这便是第一个数字。

II. Finding the Second Number (确定第二个数字：精准定位)

e. Move the dial CCW about 3 points, then return it 5-10 points back (to avoid disturbing the second wheel's position). Pull the shackle and wiggle the dial. If it wiggles easily, the second wheel is not aligned.
逆时针移动约 3 个刻度，然后往回转动 5-10 个刻度（确保不干扰第二个轮盘的新位置）。提拉锁梁并晃动拨盘。如果晃动轻松，说明第二个轮盘未对齐。

f. Repeat (e), moving CCW 3 more points each time, until it becomes "scratchy". This means you found a gate on the second wheel.
重复步骤 (e)，每次多逆时针移动 3 个刻度，直到感觉到明显的磨擦感。这说明你找到了第二个轮盘的槽口。

III. The Last Number (确定最后一个数字：开启尝试)

g. Move the dial CW one gate's distance at a time, pull the shackle, and wiggle. Continue until the dial wiggles free. This is the last number, guaranteed.
顺时针每次移动一个槽口的距离，提拉并晃动。重复此动作直到拨盘可以自由晃动。这确定就是最后一个数字。

i. If the lock opens, success! If not, return to step (f) to find the other gate on the second wheel, then try again.
如果锁开启了，恭喜成功！如果没有，请回到步骤 (f) 寻找第二个轮盘上的另一个槽口，然后再次尝试。