Abstract: A double spring folding knife includes a handle having a curvilinear groove on an interior surface, and a knife blade. The knife blade has a locking pin that extends away from a first side of the knife blade and is configured to slidingly engage the curvilinear groove. A bow spring is fixed to the handle and is orientated to interact with the locking pin in order to exert a force on the locking pin during a portion of travel along the curvilinear groove. The knife also includes a coil spring having a first end fixed to the handle and a second end fixed to a second side of the knife blade, where the coil spring is configured to exert an opening force on the knife blade after the locking pin has traveled past the bow spring along the curvilinear groove.

Abstract: A flashlight stun gun device includes a cylindrical housing having a power source coupled to discharge circuitry, where the discharge circuitry has a first lead and a second lead. In addition, a light emitting source is secured to a top end of the cylindrical housing and is coupled to the power source. A collar is secured to the top end of the housing and around the light emitting source. First and second electrodes are embedded in a first portion of a top edge of the collar and have a first gap therebetween to generate an electric arc across. Third and fourth electrodes are embedded in a second portion of the top edge of the collar opposing the first pair of electrodes and have a second gap therebetween to generate an electric arc across. The electrodes are electrically coupled together in series when the discharge circuitry is activated.