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Inside a Rim Lock - Breakdown.

Information about locks themselves. Questions, tips and lock diagram information should be posted here.

Inside a Rim Lock - Breakdown.

Postby parapilot » 8 Jan 2007 11:07

After a couple of recent questions regarding this lock I decided to take one apart for you to see / refer to when asked. These rim locks are common on older buildings and internal doors, and are of low security. They are mounted on the face of the door and not mortised. They can be mounted left or right, hence the funny shaped keyway.

Here is a picture of the lock itself. Notice the 'CAUTION DO NOT OPEN CASE' sticker. This is because when opened the parts will spring out and you wont know how it all goes together again!

Image

Image

This is the inside of the lock mechanism with me holding the parts together, and also the back case which contains some warding so the incorrect key will not work.

Image
Image

The next picture shows the key in place and turning. The key has engaged the bolt and also lifted the locking bar. This bar is in place so you can't just slide the bolt in and out with wire. The locking bar can also be engaged from the bottom keyway and the mechanism will lift the top bar unlocking the bolt. The key would also be against the warding on the back of the case, but as the lock is open you can't see it.

Image

Now to show the warding on the back case to stop the incorrect key

Image

Now we will look at putting the lock together if you have opened it and had the parts fly over the room!

Component parts

Image

Bolt goes in first

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Followed by the 2 locking bars, joining in the middle

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Now the handle mechanism

Image

And finally the spring that makes the lot work. This connects onto the lip on the locking bar and a lip on the handle mechanism. Once the spring is on you will need to hold the parts in place as shown. Then have some fun putting the cover back on! You can put your little finger through the hole in the back of the case and hold the mechanism while replacing the screws.

Image

That’s it! I have let the pictures do a lot of the talking, it’s quite a simple lock so should be easy to see how it works.

You can make up a bypass key that will open most of these cheaper locks as below.

Image


Cheers
Jamie.

(MOD's if this key is to far please delete photo - but as its such a low security lock I have included it)
parapilot
 
Posts: 599
Joined: 30 Mar 2006 15:50
Location: Wirral, UK

Postby jamesphilhulk2 » 8 Jan 2007 16:20

thanks man i.o.u one
jamesphilhulk2
 
Posts: 528
Joined: 5 Jul 2005 4:37
Location: S.Wales, uk

Postby Iron Man » 8 Jan 2007 17:32

Fantastic work there mate. Those pics are bang on as well. That was the first one that i understood so far... lol
Iron Man
 
Posts: 12
Joined: 6 Jan 2007 11:54
Location: UK

warded rim lock

Postby greyman » 8 Jan 2007 17:38

Really nice photos, parapilot. That lock you have there is a bit of a cheapie though. The warding cuts on the key are ornamental - there's no warding on the inside of the lock case?
Image
greyman
 
Posts: 1026
Joined: 21 Mar 2005 16:43
Location: NSW, Australia

Postby greyman » 8 Jan 2007 17:40

Looking again at the photos - they really are good. What kind of lighting are you using? There are hardly any shadows!
Image
greyman
 
Posts: 1026
Joined: 21 Mar 2005 16:43
Location: NSW, Australia

Postby parapilot » 8 Jan 2007 17:48

There are wards on the back case, in one photo you can see the key passing a ward and you can see the others. The warding on both side's of the key is for if you need to open the lock from behind. The bypass key would need the warding cut of the other side in this case.

The photos were taken on my window cill using natural light and flash.

Regards
Jamie
parapilot
 
Posts: 599
Joined: 30 Mar 2006 15:50
Location: Wirral, UK


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