What type of lock is this?

[Pow]

What type of lock is this?

http://www.dafor.net/win/product/technology.shtml

(I'd guess it's pretty much impossible to pick)

[WhiteHat]

this was posted a while ago - I think it was some sort of lever lock where you had to turn the key through four revolutions to open it.

I think the conclusion was you just had to pick it 4 times.

[logosys]

My Russian is a little rusty, but I'll do my best to translate...

All articles of the locks are equipped with the protection from drilling of the rack of a shaft. Since 2002 the rack has a freely rotating steel ball inside which prevents a drill from drilling it. The force of a drill on the ball of the rack of the shaft, the drilling will fail because of the rotation of the ball together with a drill. The ball in the rack can withstand heat treatment up to hardness 60-62. Until 2002 all racks of a shaft were equipped with a bolt that also had hardness 56 - 60 that prevented their destruction.

In addition, four are inserted into each lock on a special variational combination with reduced whiplash(?) of a groove until the size is .29 mm on one side of the racks of a shaft.

On the lock there are false grooves which prevent the opening of the lock by a master key (Except for a series 120 and 112).

The locking mechanism is made of a steel stock of mark DC 01+ZE 25/25 APC electroplated zinc from two sources, covering of 2.5 microns from each source, and is coated with protective greasing. Finnish firm ASVA is responsible for the preparation of the stock for manufacture.

The accuracy of the secrets (code?) of a key is smaller than +/- 0.002 mm on Italian equipment

All keys are packed into a special polyethylene package with the purpose of preventing the removal and manufacturing of illegal copies of keys. The package can be opened only by the buyer of the lock.

In addition locks can be completed with "assembly" keys which open and close locks on first two revolutions. It allows the buyer to give an assembly key to a serviceman for installation of the lock to a door. This way, the buyer can be confident that there was no removal and manufacturing of illegal copies of the original keys even until the moment of installation on a door.

The combinational secrets(code?) on a key with step depth of 2 and 1 mm is applied. The chance of visual reading of the secret(code?) of a key is practically impossible.

As a result of the new application and smaller steps of depth of cuts, there are more than 5,000,000 combinations for a key. Actually each key and its set of confidential combinations are individual for each buyer and a repeated key, will not be released earlier than 35 years

Manual adjustment of the secrets(code) of a key or the lock are impossible.
Selection of a key or opening by master keys, in view of ultrahigh privacy of the lock and accuracy of manufacturing of details is practically impossible.

The casing of the locks are covered by a powder paint made by Italian firm "ARSONSISI"

The crossbar of the lock isbprotected against twisting by a rotating core made of a firm alloy

Locks come with a complete set of keys of Italian firm "Pezziardi Ottavio s.n.c. di Pezziardi Ermanno C. Officina Meccanica" The keys have a nickel coating. Manufacture of keys is carried out according to the international requirements on ISO 9001.

Well, there goes my numerical methods class. Hope my crude (and probably wrong in parts) translation is helpful!

[hzatorsk]

...well... four 'half' revolutions....

This looks to be sort of a variation of a lever lock, except the post is designed to move through four consecutive fence positions. A position for each half turn of the key for two full key revolutions.

Seems that since the key is rotated twice, that the gate positions in the first and third positions and the second and fourth positions must match as the same edge of the key is used twice.

I can't tell for sure how many levers there are inside the lock, but it does appear that the levers are on both sides of the retractor. Both in front of and behind it.

I'd venture a guess the key must be inserted the correct way or it won't turn at all... as it is not symmetrical.

...in any case... if somebody can get their hands on one of these State side. I'd like a crack at it.

Harold

[Pow]

these are very common in europe.

it has total of 8 levers.