combo lock manipulation resistance

[kwoswalt99-]

Why don't manufacturers do this?

This way, the fence only contacts the wheel pack at a very small point, and doesn't everywhere else, eliminating feel. Has this been done before?
Also, how about a lock where the dial has to be pushed in to tension the lock, and when tensioned, doesn't allow the dial to be turned. I didn't draw this one, but I can if needed. I know of locks with push in dials, is this how they work? I don't know how these could be manipulated. Any ideas on how these could be manipulated, that aren't advanced, would be appreciated.

[GWiens2001]

It would be an advanced topic lock. But there is a lock (actually several) that work along those lines.

Gordon

[kwoswalt99-]

Safe locks in general, or the manipulation part?

[GWiens2001]

Both.

The "push in dial" is used in several manipulation resistant safe locks.

Gordon

[kwoswalt99-]

I figured this must have been done before, but I hadn't seen one. Most of the locks in my collection (pictures, I can't afford real ones) are antiques. Could you at least name some of the ones you are thinking of, so I can look them up?

[kwoswalt99-]

I figured this must have been done before, but I hadn't seen one. Most of the locks in my collection (pictures, I can't afford real ones) are antiques. Could you at least name some of the ones you are thinking of, so I can look them up?

Or maybe a pm, if you don't want to say here.

[GWiens2001]

S&G 8500 and 8550 are two of them.

Gordon

[mh]

I didn't understand the first part. What do they not do?

[tomasfuk]

Why don't manufacturers do this?

This way, the fence only contacts the wheel pack at a very small point, and doesn't everywhere else, eliminating feel. Has this been done before?

As I know this is exactly what they do. All combo locks of Group 2, Group 2M and Group 1 which I have held in my hands were done this way. Group 2M and Group 1 have additional measures against manipulation.