How Pad-Lock key works

 :Padlock-Key working Principle:

       Introduction:                                                                   Subscribe đŸ˜Ž

  • The internal mechanisms of locks are generally made of brass or die-cast zinc.The cam,which is extend beyond for lock to secure it,is usually made of steel or stainless steel. The outer casing of a lock may be made of brass, chrome, steel, nickel or any other durable metal or alloy.
                               
       Types: 
  • There are many types of locks are available in market,but mostly commonly used are padlocks,dead bolts,cam lock,lever,knob lock etc. 

      Description:

  • When you open a lock with a key, do you ever think what's going on inside?Only the correct key will open the lock.Why is that?Each key has its own unique shape. The ridges/teeth on the key have to exactly match with with the lock for it to work. 
                         
Image source: Wikipedia

Padlock Key

  • There are many types of lock. But the most common one is known as the Pin Tumbler Lock.The pin tumbler lock is a lock mechanism that incorporates pins varying in different lengths to precent the lock from being cracked. Pin tumbler locks are the most commonly used in cylinder locks, but can also be found in a tubular pin tumbler lock.Let me explain how this works.
           Figure 1
                                                                                              
  • Refer figure 1,the outside part of the lock is called the case. The inside part of the lock is called the plug. This is the part that turns when the correct key is put in.The opening of the lock is called the key-way.
  • Inside there are few more parts.There are several vertical shafts that go through the case and the plug.Each shaft has a spring,driver pin and a key pin.
                         
  • The springs press all the pins down so they all rest on a ledge inside the lock. The pins meet at a different level for each shaft.For the plug to turn, the pins must line up with the sheer line.

                     


  • Now if we enter the wrong key,the pins do not line up and the plug do not rotate.When we insert the correct key, everything lines up and the plug turns.So we have covered the case of one key and one lock.
                             
Correct vs. Incorrect  key
  • Lets take another example.With reference to figure 2 assume that there is a building and there are different keys for different doors. But there is one extra key which can open all doors of the building.That key is known as the Master key.
                 
Figure 2
  • With reference to figure 3 mentioned below,that master key to work,there must be an extra pin attached with the vertical shaft or driver pin inside the lock is called extra driver pin or master pin.Figure elaborate the same.Now the plug will turn if there is a key that raises the pin.
                    
Figure -3-Difference between master key and normal key

  • So if one uses the normal key and the Master key,in both cases,the lock will open. Some master key have more than one extra driver pin or master pin installed in shaft. So in this way pin tumbler lock works.
  • OK,lot to discuss regarding this,however many more journals,video,books    are available in market,you can go through it for detail study. I hope I  could explain to you in better-way.
                         
Translate In Bengali                    

āĻĒ্āϝাāĻĄāϞāĻ• āĻ•ী āĻ•াāϰ্āϝāύিāϰ্āĻŦাāĻšী

      āĻ­ূāĻŽিāĻ•া:

  • āϤাāϞাāϰ āĻ…āĻ­্āϝāύ্āϤāϰীāĻŖ āĻĒ্āϰāĻ•্āϰিāϝ়াāĻ—ুāϞি āϏাāϧাāϰāĻŖāϤ āĻĒিāϤāϞ āĻŦা āĻĄাāχ-āĻ•াāϏ্āϟ āĻĻāϏ্āϤা āĻĻিāϝ়ে āϤৈāϰি āĻšāϝ়।  āϞāĻ•েāϰ āĻŦাāχāϰেāϰ āφāĻŦāϰāĻŖāϟি āĻĒিāϤāϞ, āĻ•্āϰোāĻŽ, āχāϏ্āĻĒাāϤ, āύিāĻ•েāϞ āĻŦা āĻ…āύ্āϝ āĻ•োāύāĻ“ āϟেāĻ•āϏāχ āϧাāϤāĻŦ āĻŦা āφāϞোāϰ āĻĻ্āĻŦাāϰা āϤৈāϰি āĻšāϤে āĻĒাāϰে। 

     āĻĒ্āϰāĻ•াāϰ:
  • āĻŦাāϜাāϰে āĻ…āύেāĻ• āϧāϰāĻŖেāϰ āϞāĻ• āĻĒাāĻ“āϝ়া āϝাāϝ় āϤāĻŦে āĻŦেāĻļিāϰāĻ­াāĻ— āĻ•্āώেāϤ্āϰে āĻŦ্āϝāĻŦāĻšৃāϤ āĻšāϝ় āĻš'āϞ āĻĒ্āϝাāĻĄāϞāĻ•āϏ,āĻŽāϰা āĻŦāϞ্āϟāϏ, āĻ•্āϝাāĻŽ āϞāĻ•, āϞিāĻ­াāϰ, āύāĻŦ āϞāĻ• āχāϤ্āϝাāĻĻি। 
   āĻŦিāĻŦāϰāĻŖ:
  • āφāĻĒāύি āϝāĻ–āύ āĻ•োāύāĻ“ āĻ•ী āĻĻিāϝ়ে āĻ•োāύāĻ“ āϞāĻ• āĻ–োāϞেāύ, āφāĻĒāύি āĻ•ি āĻ•āĻ–āύāĻ“ āĻ­াāĻŦāĻ›েāύ āϝে āĻ­িāϤāϰে āĻ•ী āϚāϞāĻ›ে? āĻ•েāĻŦāϞ āϏāĻ িāĻ• āĻ•ী āϞāĻ•āϟি āĻ–ুāϞāĻŦে āĻ•েāύ āĻāϟি? āĻĒ্āϰāϤিāϟি āĻ•ীāϟিāϰ āύিāϜāϏ্āĻŦ āϏ্āĻŦāϤāύ্āϤ্āϰ āφāĻ•াāϰ āϰāϝ়েāĻ›ে। āĻ•ীāϤে āĻĨাāĻ•া āĻļ্āϝাāĻ“āϏ / āĻĻাঁāϤāĻ—ুāϞিāϰ āĻ•াāϜ āĻ•āϰাāϰ āϜāύ্āϝ āϞāĻ•āϟিāϰ āϏাāĻĨে āĻšুāĻŦāĻšু āĻŽিāϞ āĻ•āϰāϤে āĻšāĻŦে।
  • āϞāĻ• āĻ…āύেāĻ• āϧāϰāĻŖেāϰ āφāĻ›ে। āϤāĻŦে āϏāϰ্āĻŦাāϧিāĻ• āϏাāϧাāϰāĻŖ āĻĒিāύ āϟাāĻŽ্āĻŦāϞাāϰ āϞāĻ• āĻšিāϏাāĻŦে āĻĒāϰিāϚিāϤ āĻĒিāύ āϟাāĻŽ্āĻŦāϞাāϰ āϞāĻ•āϟি āĻāĻŽāύ āĻāĻ•āϟি āϞāĻ• āĻŽেāĻ•াāύিāϜāĻŽ āϝা āϞāĻ•āϟি āĻ•্āϰ্āϝাāĻ• āĻšāĻ“āϝ়াāϰ āĻšাāϤ āĻĨেāĻ•ে āĻŦাঁāϚাāϰ āϜāύ্āϝ āĻŦিāĻ­িāύ্āύ āĻĻৈāϰ্āϘ্āϝে āĻĒāϰিāĻŦāϰ্āϤিāϤ āĻĒিāύāĻ—ুāϞি āĻ…āύ্āϤāϰ্āĻ­ুāĻ•্āϤ āĻ•āϰে। āĻĒিāύ āϟিāĻŽ্āĻŦāϞাāϰ āϞāĻ•āĻ—ুāϞি āϏিāϞিāύ্āĻĄাāϰ āϞāĻ•āĻ—ুāϞিāϤে āϏāϰ্āĻŦাāϧিāĻ• āĻŦ্āϝāĻŦāĻšৃāϤ āĻšāϝ়। āϤāĻŦে āĻāϟি āϟিāωāĻŦুāϞাāϰ āĻĒিāύ āϟাāĻŽ্āĻŦāϞাāϰ āϞāĻ•āϟিāϤেāĻ“ āĻĒাāĻ“āϝ়া āϝাāϝ়। āĻ•ীāĻ­াāĻŦে āĻāϟি āĻ•াāϜ āĻ•āϰে āϤা āφāĻŽাāĻ•ে āĻŦ্āϝাāĻ–্āϝা āĻ•āϰāϤে āĻĻিāύ।
  • āϚিāϤ্āϰ 1 āĻĻেāĻ–ুāύ, āϞāĻ•েāϰ āĻŦাāχāϰেāϰ āĻ…ংāĻļāϟিāĻ•ে āĻ•েāϏ āĻŦāϞা āĻšāϝ়। āϞāĻ•েāϰ āĻ­িāϤāϰেāϰ āĻ…ংāĻļāϟিāĻ•ে āĻĒ্āϞাāĻ— āĻŦāϞা āĻšāϝ়। āϏāĻ িāĻ• āĻ…ংāĻļāϟি āĻ•ী āϝুāĻ•্āϤ āĻ•āϰা āĻšāϞে āĻāϟি āϏেāχ āĻ…ংāĻļāϟি āϘুāϰিāϝ়ে āĻĻেāϝ়। āϞāĻ•āϟি āĻ–োāϞা āĻ…ংāĻļāĻ•ে āĻ•ী-āĻ“āϝ়ে āĻŦāϞা āĻšāϝ়।
  • āĻ­িāϤāϰে āφāϰāĻ“ āĻ•āϝ়েāĻ•āϟি āĻ…ংāĻļ āϰāϝ়েāĻ›ে,āϝেāĻ–াāύে āĻŦেāĻļ āĻ•āϝ়েāĻ•āϟি āωāϞ্āϞāĻŽ্āĻŦ āĻļ্āϝাāĻĢ্āϟ āϰāϝ়েāĻ›ে āϝা āĻ•েāϏ āĻāĻŦং āĻĒ্āϞাāĻ—েāϰ āĻŽāϧ্āϝ āĻĻিāϝ়ে āϝাāϝ়।āĻĒ্āϰāϤিāϟি āĻ–াāĻĻে āĻāĻ•āϟি āĻŦāϏāύ্āϤ, āĻĄ্āϰাāχāĻ­াāϰ āĻĒিāύ āĻāĻŦং āĻāĻ•āϟি āĻ•ী āĻĒিāύ āĻĨাāĻ•ে।
  • āϏ্āĻĒ্āϰিংāϏāĻ—ুāϞি āϏāĻŽāϏ্āϤ āĻĒিāύāĻ—ুāϞি āύীāϚে āϟিāĻĒুāύ āϝাāϤে āϤাāϰা āϏāĻ•āϞেāχ āϞāĻ•েāϰ āĻ…āĻ­্āϝāύ্āϤāϰে āĻāĻ•āϟি āĻ–েāϜুāϰ āωāĻĒāϰ āĻŦিāĻļ্āϰাāĻŽ āĻ•āϰে। āĻĒিāύāĻ—ুāϞি āĻĒ্āϰāϤিāϟি āĻļ্āϝাāĻĢāϟেāϰ āϜāύ্āϝ āφāϞাāĻĻা āϏ্āϤāϰে āĻŽিāϞিāϤ āĻšāϝ়। āĻĒ্āϞাāĻ—āϟি āϘুāϰিāϝ়ে āφāύাāϰ āϜāύ্āϝ, āĻĒিāύāĻ—ুāϞি āĻ…āĻŦāĻļ্āϝāχ āύিāĻ›āĻ• āϰেāĻ–াāϰ āϏাāĻĨে āϞাāχāύ āĻ•āϰāĻŦে।
  • āĻāĻ–āύ āφāĻŽāϰা āϝāĻĻি āĻ­ুāϞ āĻ•ী āĻĒ্āϰāĻŦেāĻļ āĻ•āϰি, āĻĒিāύāĻ—ুāϞি āϞাāχāύ āĻ•āϰে āύা āĻāĻŦং āĻĒ্āϞাāĻ—āϟি āϘোāϰāĻŦে āύা।āϝāĻ–āύ āφāĻŽāϰা āϏāĻ িāĻ• āĻ•ীāϟি āϏāύ্āύিāĻŦেāĻļ āĻ•āϰি āϤāĻ–āύ āϏāĻŽāϏ্āϤ āĻ•িāĻ›ু āϞাāχāύ āĻšāϝ়ে āϝাāϝ় āĻāĻŦং āĻĒ্āϞাāĻ—āϟি āωāϞ্āϟে āϝাāϝ়।āϏুāϤāϰাং āφāĻŽāϰা āĻāĻ•āϟি āĻ•ী āĻāĻŦং āĻāĻ•āϟি āϞāĻ•েāϰ āĻ•েāϏāϟি āĻ•āĻ­াāϰ āĻ•āϰেāĻ›ি।
  • āĻ…āύ্āϝ āĻāĻ•āϟি āωāĻĻাāĻšāϰāĻŖ āύিāϤে āĻĻিāύ। āϚিāϤ্āϰ 2 āĻāϰ āϰেāĻĢাāϰেāύ্āϏেāϰ āϏাāĻĨে āϧāϰে āύিāύ āϝে āĻāĻ–াāύে āĻāĻ•āϟি āĻŦিāϞ্āĻĄিং āϰāϝ়েāĻ›ে āĻāĻŦং āĻŦিāĻ­িāύ্āύ āĻĻāϰāϜাāϰ āϜāύ্āϝ āφāϞাāĻĻা āĻ•ী āϰāϝ়েāĻ›ে। āϤāĻŦে āĻāĻ•āϟি āĻ…āϤিāϰিāĻ•্āϤ āĻ•ী āϰāϝ়েāĻ›ে āϝা āĻ­āĻŦāύেāϰ āϏāĻŽāϏ্āϤ āĻĻāϰāϜা āĻ–ুāϞāϤে āĻĒাāϰে। āϏেāχ āϚাāĻŦিāϟি āĻŽাāϏ্āϟাāϰ āĻ•ী āĻšিāϏাāĻŦে āĻĒāϰিāϚিāϤ।
  • āύীāϚে āωāϞ্āϞিāĻ–িāϤ āϚিāϤ্āϰ 3 āĻāϰ āωāϞ্āϞেāĻ–েāϰ āϏাāĻĨে, āϏেāχ āĻŽাāϏ্āϟাāϰ āĻ•ীāϟি āĻ•াāϜ āĻ•āϰāϤে āĻšāĻŦে, āϞāĻ•েāϰ āĻ…āĻ­্āϝāύ্āϤāϰে āωāϞ্āϞāĻŽ্āĻŦ āĻļাāĻĢāϟ āĻŦা āĻĄ্āϰাāχāĻ­াāϰ āĻĒিāύেāϰ āϏাāĻĨে āϝুāĻ•্āϤ āĻāĻ•āϟি āĻ…āϤিāϰিāĻ•্āϤ āĻĒিāύ āĻĨাāĻ•āϤে āĻšāĻŦে āϤাāĻ•ে āĻ…āϤিāϰিāĻ•্āϤ āĻĄ্āϰাāχāĻ­াāϰ āĻĒিāύ āĻŦা āĻŽাāϏ্āϟাāϰ āĻĒিāύ āĻŦāϞে। āϚিāϤ্āϰāϟি āĻāĻ•āχāĻ­াāĻŦে āĻŦ্āϝাāĻ–্āϝা āĻ•āϰুāύ the āĻĒিāύ āωāϤ্āĻĨাāĻĒāύāĻ•াāϰী āĻ•োāύāĻ“ āĻ•ী āĻĨাāĻ•āϞে āĻāĻ–āύāχ āĻĒ্āϞাāĻ—āϟি āϚাāϞু āĻšāĻŦে।
  • āϏুāϤāϰাং āϝāĻĻি āĻ•েāω āϏাāϧাāϰāĻŖ āĻ•ী āĻāĻŦং āĻŽাāϏ্āϟাāϰ āĻ•ী āĻŦ্āϝāĻŦāĻšাāϰ āĻ•āϰে āϤāĻŦে āωāĻ­āϝ় āĻ•্āώেāϤ্āϰেāχ āϞāĻ•āϟি āĻ–ুāϞāĻŦে। āĻ•িāĻ›ু āĻŽাāϏ্āϟাāϰ āĻ•ীāϤে āĻļ্āϝাāĻĢāϟে āĻāĻ•াāϧিāĻ• āĻ…āϤিāϰিāĻ•্āϤ āĻĄ্āϰাāχāĻ­াāϰ āĻĒিāύ āĻŦা āĻŽাāϏ্āϟাāϰ āĻĒিāύ āχāύāϏ্āϟāϞ āĻĨাāĻ•ে। āϏুāϤāϰাং āĻāχāĻ­াāĻŦে āĻĒিāύ āϟাāĻŽ্āĻŦāϞাāϰ āϞāĻ• āĻ•াāϜ āĻ•āϰে।
  • āĻ িāĻ• āφāĻ›ে, āĻ āϏāĻŽ্āĻĒāϰ্āĻ•ে āĻ…āύেāĻ• āφāϞোāϚāύা āĻ•āϰা āĻšāϞো। āϤāĻŦে āφāϰāĻ“ āĻ…āύেāĻ• āϜাāϰ্āύাāϞ, āĻ­িāĻĄিāĻ“, āĻŦāχ āĻŦাāϜাāϰে āĻĒাāĻ“āϝ়া āϝাāϝ়, āφāĻĒāύি āĻŦিāĻļāĻĻ āĻ…āϧ্āϝāϝ়āύেāϰ āϜāύ্āϝ āĻāϟিāϰ āĻŽাāϧ্āϝāĻŽে āϝেāϤে āĻĒাāϰেāύ। āφāĻŽি āφāĻļা āĻ•āϰি āφāĻŽি āφāĻĒāύাāĻ•ে āφāϰāĻ“ āĻ­াāϞ āωāĻĒাāϝ়ে āĻŦ্āϝাāĻ–্āϝা āĻ•āϰāϤে āĻĒাāϰāϞাāĻŽ। 


                                                āϧāύ্āϝāĻŦাāĻĻ

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