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Modification on Medeco's biaxial concept

TOSL Project. A community project to "build a better mousetrap".

Modification on Medeco's biaxial concept

Postby vov35 » 6 Oct 2010 16:58

I thought the idea of having two dimensions in which you manipulate a pin was rather brilliant. (try plugging something in in the dark, you've got two dimensions in which you miss the plug, and if you really can't see you're screwed, right?)

However, from what I've seen the system has a picking vulnerability as a result of the different mechanisms of the rotational and vertical axis. The pin tumbler action is picked and then followed up with a medecoder, which I'd say is simply a ridiculous design flaw.

One would observe that GM sidebar locks are similar in function of measuring vertical position to how medeco measures rotation. Those locks are a total pain to pick, and can't be bumped/vibrated as far as I understand the mechanism. Now rather than having medeco's vertical cuts in the bottom pin of a pin tumbler, or a the Briggs & Stratton (GM) horizontal cuts... why not have a sidebar with round pins that enter the manipulated pin (called "comb pins" in medeco? I think?) which would be drilled with round holes. Then the remainder of the bottom pin could be covered completely in false depth dimples, perhaps spaced in a fully random pattern (not grid...) to thoroughly confuse anybody picking.

The result is that both dimensions of the lock cut are manipulated by a single sidebar mechanism.

(I'll attach a picture if I figure out how to render my idea....)
The BiLock isn't the first bump proof pin tumbler because it isn't a pin tumbler.
And it's called a shear line, not a "sheerline".
vov35
 
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Joined: 29 Sep 2010 15:13

Re: Modification on Medeco's biaxial concept

Postby mh » 6 Oct 2010 23:01

Is this similar to the Medeco cam lock? (only key pins, that have holes for the side bar)

Cheers
mh
"The techs discovered that German locks were particularly difficult" - Robert Wallace, H. Keith Melton w. Henry R. Schlesinger, Spycraft: The secret history of the CIA's spytechs from communism to Al-Qaeda (New York: Dutton, 2008), p. 210
Image
mh
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Location: Germany

Re: Modification on Medeco's biaxial concept

Postby vov35 » 7 Oct 2010 20:27

that's almost exactly what I was thinking. Now how do we add another dimension to the key? xD
Something like mul-t-lock's concentric pins could be used to measure angle of cut, but the question is in how to make that mechanism operate the same sidebar simultaneously to the remaining mechanism...
To prevent the picking of one then the other...


Also the use of more false dimples paired with a second sidebar at a different height == false set hell.
The BiLock isn't the first bump proof pin tumbler because it isn't a pin tumbler.
And it's called a shear line, not a "sheerline".
vov35
 
Posts: 229
Joined: 29 Sep 2010 15:13


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