Here's a copy of the definition out of the Tx penal code for switch blade.
(11) "Switchblade knife" means any knife that has a blade that folds, closes, or retracts into the handle or sheath, and that:
(A) opens automatically by pressure applied to a button or other device located on the handle; or
(B) opens or releases a blade from the handle or sheath by the force of gravity or by the application of centrifugal force.
It is written in broad enough terms to cover a knife that will open with a flick of the wrist. I don't really agree that such a knife should be considered a switch blade and I would not want to be the one to make that arrest and be the test case but I'm sure there's an officer out there somewhere who will.
(11) "Switchblade knife" means any knife that has a blade that folds, closes, or retracts into the handle or sheath, and that:
(A) opens automatically by pressure applied to a button or other device located on the handle; or
(B) opens or releases a blade from the handle or sheath by the force of gravity or by the application of centrifugal force.
It is written in broad enough terms to cover a knife that will open with a flick of the wrist. I don't really agree that such a knife should be considered a switch blade and I would not want to be the one to make that arrest and be the test case but I'm sure there's an officer out there somewhere who will.