Monitor Levers

[greyman]

(I posted this on one of the Chubb threads, but it is on a different topic to picking)

I have a question about the older style Chub 3G114 5-lever lock.

As well as the 7 different lever sizes there are a number of "monitor" levers (3 I think) that have differing belly sizes. Can someone tell me what the function of these is? Is it just to make it more difficult to decode the lock?

On a slightly different subject - can someone tell me how many depths of cut there are for a Sargent & Greenleaf 6804 key-op (7 lever) lock? I'd like to get a feel for the number of keying combinations for this type of lock.

Thanks for any help.

[Shrub]

I saw your original post but couldnt answer it 100% so thought someone else would, i guess no-one did

As far as i know, the monitor levers are an anti picking feature, when tripped they stop the lock from opening, you need to turn the key backwards to reset them and then turn it the proper way to unlock the door,

Have a look through sidpicks topics to find the 110 threads(i think), here he describes how he cut them down to make learning to pick them easier,

Im not 100% on all this as i dont come across many at all, Pinky is your best man to talk to and im sure if you get no answers over the next day or so a pm to him would get you the answers you want (hes very busy at the mo so i dont think he comes by so often at the moment but a pm will get to him)

[sidpick]

I will dig out my MLA dictionary, off the top of my head the monitor lever basically 'monitors' the original key. if a dud key or pick is inserted the 'tail' of the monitor lever partially blocks the key hole. This does not rule out picking, just makes for a harder pick.
If you trip the monitor lever you must re-set all the levers and start again.
In the old chubbs I have done, there only has been one monitor lever.
Hope this helps!

[oldlock]

You are both thinking of the Chubb detector.

The monitor lever is to ensure that the bolt is fully thrown (and the lock is secure), so that if a worn / damaged / filed down key is used it will not half throw the lock leaving it easily opened with a bit of wire. The tail on the lever prevents the removal of such a key.

Paul

[Shrub]

Thanks Paul