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compesson lock
- Thread starter audiopile
- Start date
Not quite correct, it looks like that, but the mechanics are quite different.
From the Spyderco site, here's a diagram:
How it works is that when the knife is open, the locking bar (or compression insert, as they call it on the diagram) is wedged in between the tang of the blade and the stop/anvil pin. Instead of working like a liner lock, when you press on the blade, the locking bar is compressed (hence the name) between the tang and the stop pin, so the only way for the lock to fail (short of manufacturing errors) is for the stop pin to pop out, (since I don't see a piece of metal that small deforming to the size that the tang can move out of the way without the stop pin going first), compared with a liner lock, where you rely on the locking bar not folding on you. Much stronger and more reliable in my opinion.
http://www.youtube.com/watch?v=FbCqHUbF8EA
here is a vid of a paramilitary (compression lock)
as you can see it is easily closed with one hand.
here is a vid of a paramilitary (compression lock)
as you can see it is easily closed with one hand.
Very easily closed with one hand, as the above video shows. My personal method is from holding the knife, to put my index finger on the hole, use my thumb to push the locking bar while still gripping the knife with my middle, ring and little fingers, move the blade with my index finger so the lock won't engage, then move my fingers out of the way while holding it in a sort of pinch grip between my thumb and the knuckle on my index finger closest to my palm. No reorientation of the knife needed.
In terms of closing, yes. In terms of how it operates, no.
No, it isn't. You see, on a linerlock the open blade tends to bend the lock when you apply a negative pressure (try to close the blade). On a compression lock, the blade is "squeezed" between the lock and the stop pin. Therefore, the compression lock is much stronger than a linerlock, because you have not only to bend the lock, but to break the stop pin as well.
Hope this clearifies things a bit.
- Joined
- Feb 2, 2005
- Messages
- 4,271
suppose ill have to buy one to fully understand.
Probably. That's the only way I was able to get a clear picture of how it works. It's not the same as a liner lock even though it operates with a tab and a piece of spring metal.
It does work quite well with either hand, BTW. I can easily open and close my Para with either hand and the Comp lock keeps my fingers out of the way of the blade when it's closing.
Actually it is quite different in terms of strength and reliability: A long locking pin in compression like on the liner lock can easily buckle and slip from the lock face. On a compression lock the pin is actually wedged between the lock face and an anvil pin. So the force does not act along the length of the locking pin but transverse to it, so it acts over a very short distance and is backed up by an anvil pin and since it is wedged between the face an the anvil pin there is practically zero chance of it slipping. Both much stronger and more reliable.
For some good info check out this thread over on the factory forum.
http://spyderco.com/forums/showthread.php?t=29211&highlight=compression+lock
Read some of the posts and then check out the pic that David Lowry posted.
http://spyderco.com/forums/showthread.php?t=29211&highlight=compression+lock
Read some of the posts and then check out the pic that David Lowry posted.
- Joined
- Apr 27, 2003
- Messages
- 5,738
By that logic, night is just like day, only the sun is on the other side of the earth.Yes, SPECIFICALLY it is different. However, it's like a liner lock, just on the other side of the knifeIt uses spring steel and helps stop the blade from closing.
I close mine one handed, forefinger closes the lock and then flick it closed.