disk detainer design v3

[98AB49DC5A]

I think I finally stumbled upon a simple effective high security disk detainer cylinder design. Each disk has two parts loosely coupled, as in my other design. there is one sidebar which can move into and out of the disk pack and can move a little bit laterally within the cylinder.

here are links to the pics all modeled in phun
http://www.postimage.org/image.php?v=PqIb3aA

the red disks have angled cuts as shown in the cross section. the green ones which are loosely coupled to them have cuts corresponding to those of the key the sidebar descends into thered disk cuts freezing these disks in place. once the sidebar hits the angled surfaces it begins to move diagonally and if the disk groups are at the correct combo the sidebar can retract fully.
incorrect combo(http://www.postimage.org/image.php?v=PqIcrtA)
correct one(http://www.postimage.org/image.php?v=TsUwrVi)

in retrospect to prevent attacks like this(http://blackbag.nl/?p=319) The green disks cuts should be on the inner side of the disk, that would ensure that the sides of the disk groups provide no hints to the combo. Also there should be spacers between the disk groups.

[98AB49DC5A]

I ought to mention that this type of thing would work for any lock employing disks or wafers. high security mechanical combination locks(single dial) would be very easy to make using this principle. each wheel is already made using a three layer sandwich and the outer two layers contain gates. Using this design the contact points would yield no useful information.

[inverseentropy]

So, if I understand correctly, the red and green discs are coupled together with maybe a peg or something that allows for a tiny bit (maybe one degree) of rotation between them?

There is an area where the red discs are nearly touching each other. Perhaps you could add a sort of zigzag interface between them so that people can't poke probes up through there. That is assuming that there isn't any reason that you don't want any friction between the red discs. Of course this makes the machining of the discs more complicated.

[98AB49DC5A]

I was a little lazy there, This is very similar in concept to an abloy, just with modified disks and sidebar so you need a spacer between each disk pair. a rotationallty symetrical zigzag pattern would be a good thing thogh. I will incorporate that in my next model.