Few days ago, I was with a locksmith of my friends and a client asked him to make
a key for a safe lock and to find and change the combination.
So we had some fun with this lock, quite old (50 years maybe), made by Vigie Picard.
Here is a dismantling report :
As you can see, there is 4 dials and a keyway for a Bramahâ€™type lock, or a Pumpsâ€™Lock.
Under that, the locking mechanism :
Here are all the elements taken apart :
The rear gear of a dial :
The back of the lock, with the gears, here scrambled :
And here aligned for receiving the locking plate' teeth :
The locking plate :
The lock ready to unlock :
Here the plate pushed with the hand for changing the code :
Here the front of the keyâ€™lock :
Here the back of the lock :
The pumps and the blocking plate (shear line) :
The pumps in the lock, not at the shear line (we can see them in the groove)
And here the key done for the lock !
How to open this lock without the proper key and code cannot be discussed here,
but I want just to show a better view of the pumps :
We can see that the bottom part of all the pumps has the same length, so we can easily
find the combination of the key when the lock is mounted. It is probably advanced
(although itâ€™s easy) so I will not tell you how to, but you may find yourself
The using of an umbrella can be useful but not necessary.
If you have question about this lock, feel free to askHappy to share it with you
NB : The client gave the right to share pictures.
NB2 : Some information has been hidden to avoid photographical decoding of the key