FAQ  •  My feedback  •  Feedback
UKLockpickers.co.uk Lockpicking supplies such as Lockpicks, tools, and more! COMMANDOLOCK.COM Military grade padlock systems lockpickshop.com A source for lockpicking supplies such as lockpicks, locksmith tools, and more!

Friction-Fence Locks

<<

MartinHewitt

User avatar

Prolific Poster

Posts: 1657

Joined: Sat Nov 26, 2016 6:19 pm

Location: Germany

Post Fri Mar 12, 2021 11:40 pm

Re: Friction-Fence Locks

A bit more information about the CNAB-6.

This one shows nicely the friction fence mechanism. I colored blue, what would be the drive cam in a real friction fence lock. It has moved away from the spindle and drives only the friction fence. The friction is happening at the red location driving the big part. This big part is then connected to the part which has the actual fence, which I have marked pink.

fig4.jpg


The part marked in red is basically the "software" of the lock. The cogs on this barrel control which wheel is moved. It is interfacing with the cogs on the primary gear stack (green). The program counter is incremented by the blue hook.

fig20.jpg


This figure shows the two gear stacks. The connection between them determines the combination. The missing cog (pink) on the secondary gears are the gates. The part marked in green is rewinding the program barrel to the start.

fig9.jpg


There is are also mechanisms to turn the primary gear stack back, to change the combination and to lock and unlock the back cover.

It is quite difficult to show the operation, because the primary gear stack is fixed to the T plate which covers a lot of the lock's mechanics. I made a few videos showing an opening with details hoping, that it helps understanding the lock. I think with the help of the above figures it is possible to understand what is shown in the videos.

https://vimeo.com/521935515
https://vimeo.com/521935609
https://vimeo.com/521935676
https://vimeo.com/521935750
You do not have the required permissions to view the files attached to this post.
In case you wonder ... Martin Hewitt is a fictional detective in stories by Arthur Morrison:
Martin Hewitt, Investigator Chronicles of Martin Hewitt
<<

madsamurai

User avatar

Active Member

Posts: 365

Joined: Wed Jan 04, 2017 4:13 am

Location: Germantown, Ohio

Post Sat Mar 13, 2021 2:39 am

Re: Friction-Fence Locks

wow, that's a piece of work... looks more like a clock mechanism. Nice work on the videos. So does the dial spring back to zero after setting each digit? It looks like it all turns the same direction...
<<

MartinHewitt

User avatar

Prolific Poster

Posts: 1657

Joined: Sat Nov 26, 2016 6:19 pm

Location: Germany

Post Sat Mar 13, 2021 8:38 am

Re: Friction-Fence Locks

In case you wonder ... Martin Hewitt is a fictional detective in stories by Arthur Morrison:
Martin Hewitt, Investigator Chronicles of Martin Hewitt
Previous

Return to Safes, Strongboxes & Combination Locks

Who is online

Users browsing this forum: CommonCrawl [Bot]

Don't forget to visit our sponsors for all of your lockpicking needs!
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Grop
"CA Black" theme designed by stsoftware