Is My OTF Knife Configuration Safe for Everyday Carry?

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SUMMARY

The discussion centers on the safety of carrying an OTF (out the front) knife with a magnetic force of 1 lb, 12 oz required to eject the blade. The user conducted various tests to assess the knife's stability while carried in a pocket. However, the conversation shifted to the legality of such knives, highlighting that many jurisdictions, particularly in the US, have strict laws against switchblade knives, including OTF models. The thread was ultimately closed due to the legal implications surrounding the discussion of potentially illegal knives.

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  • Understanding of OTF knife mechanics and operation
  • Knowledge of local knife laws and regulations
  • Basic principles of physics related to force and stability
  • Awareness of safety considerations for carrying knives
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  • Research local laws regarding the legality of OTF knives and switchblades
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  • Study the physics of force and stability in relation to pocket-carrying knives
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This discussion is beneficial for knife enthusiasts, legal professionals, and individuals interested in the safety and legality of carrying OTF knives in various jurisdictions.

goldliger
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Hey guys, brand new here but looks like I'm in the right place :D

I've got an OTF knife (a.k.a. "out the front," where the blade ejects straight out from the handle) that is held in the closed position with 1 lb, 12 ounces of magnetic force. I.e, upon measuring it takes 1 lb, 12 oz. of finger pressure against the knife switch to eject the blade (automatically). The blade itself weighs 1 oz.

Basically, I'm wondering how one would go about determining whether this is a reasonably safe configuration, considering the knife will be carried in the pocket and generally tip pointed down (within the handle, of course). I've done rudimentary testing such as jumping up and down, stomping, shaking my pockets, etc, with the knife in my pocket - pretty much everything short of jumping off a 100 foot cliff with rock slab at the bottom, since I figure knife safety would be the least of my concerns on the way down. :)

Any ideas, mathematical formulas, etc, are most welcome, and thanks for your time!
 
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goldliger said:
I've got an OTF knife (a.k.a. "out the front," where the blade ejects straight out from the handle)
Welcome to PhysicsForums.

You need to check your local laws about that knife. Knife laws vary by country, state and local jurisdiction, but in many parts of the US at least, switchblade knives and butterfly knives are illegal (they are illegal in the part of the US where I live).
 
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Yes you're correct about that - and thank you, good to be here. :)
 
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Since the knife is most likely illegal, we can't really discuss it here (that's in the PF rules). I once bought a butterfly knife online many years ago before I found out they are illegal here in California. I thought it was a nice design and a handy way to be able to open a useful knife with one hand (I wanted to use it for hunting and fishing, etc.). Then I found out it was illegal (I still to this day do not understand why -- something about the tiny springiness that is used to help start opening it), and destroyed it and threw the pieces away. The risk was not worth the utility.

Anyway, sorry but this thread is now closed.
 

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