Source for glass plate?

[MartinHewitt]

This is the Fort Knox drive system: https://youtu.be/KSFvqYaqooQ?t=216 They say it is patented, but I can't find it.

[nothumbs]

https://patents.justia.com/assignee/fort-knox-inc
And the full text https://patents.justia.com/patent/9622577

But this appears to be for a shelving system in a safe, and not for the gearing inside the door.

Here's the direct link to the USPO for that same patent: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&co1=AND&d=PTXT&s1=%22FORT+KNOX,+INC%22.ASNM.&OS=AN/

Searching there for the Fort Knox assignee name does not find anything else, so if the gear system is patented, perhaps someone else holds the patent?

[joejo]

The one with a rack on each bolt is the executive or something, I forget at the moment.

I was thinking similar to this
http://www.tomziemer.com/wp-content/uploads/2015/09/Blog-boltworks-004-e1457378099356.jpg

I think this is a fort Knox, but maybe not.

[MartinHewitt]

That is the only patent I found in their name too. And it is clearly not for the bolt work.

But then I searched for the inventors of this patent and found following two patents:
https://patents.google.com/patent/US5094483A/en
https://patents.google.com/patent/US5067755A/en

And:
https://patents.google.com/patent/US5088776A/en
https://patents.google.com/patent/US5245846A/en

[nothumbs]

Nicely done. I'll remember that for future patent searches.

[MartinHewitt]

Looking at the patents they reference I have to say that I like the Fort Knox bolt work least. I don't like it, because of the chain of gears. If the chain is separated at one point all bolts afterwards are free to move.

This https://patents.google.com/patent/US533298A/en has also lots of gears. Even more so than the Fort Knox patent, but it is not so much a chain of gears. From a quick glance there could be a few gears on which most of the bolt work movement depends, but most of the gears are on their own.

This https://patents.google.com/patent/US4679415A/en is the direct precursor to the Fort Knox patents. Here the lock acts directly on the gear moving the bolt work. In the simple Fort Knox bolt work there is one gear in between increasing the attack possibilities.

[joejo]

Looking at the patents they reference I have to say that I like the Fort Knox bolt work least. I don't like it, because of the chain of gears. If the chain is separated at one point all bolts afterwards are free to move.

This https://patents.google.com/patent/US533298A/en has also lots of gears. Even more so than the Fort Knox patent, but it is not so much a chain of gears. From a quick glance there could be a few gears on which most of the bolt work movement depends, but most of the gears are on their own.

This https://patents.google.com/patent/US4679415A/en is the direct precursor to the Fort Knox patents. Here the lock acts directly on the gear moving the bolt work. In the simple Fort Knox bolt work there is one gear in between increasing the attack possibilities.

I agree completely. I am thinking 3 gears similar to your second link, one where the patent shows it, then 1 more at the top and 1 at the bottom, but all 3 the same size and all 3 tying left and right bolts together. 2 locks, with the bottom lock blocking the bottom and middle gears, and the top lock blocking the top gear. May as well put a glass and thermal relocker on each gear, plus an extra somewhere because... why not?

[joejo]

I just cant find ceramic wool to fit my budget right now, so going to have to hold off. I did find a glass shop that I can order glass from. Got a few pieces coming to test out.

[MartinHewitt]

The ceramic wool would be for fire insulation? I know ceramic wool, which is btw. an ugly material, only from the bottom end with a very unspecific fire resistance claim. The technology guy at AMSEC is arguing strongly for stuff containing water. This kind of material has a very long tradition in fire-proofing with using alum. Among the non-water-containing materials I don't think fibers will perform well, because host gases can pass through. It should be more like styrofoam, just really heat resistance. I think making a self-built safe burglary resistant is easier than making it fire-resistant. Thinking like a burglar is so much more easy for us than thinking like a fire.