Folding knife with secondary locking mechanism

A folding knife with secondary locking mechanism, comprising:

• a handle comprising opposing scales and a cavity therebetween;
• a knife blade having a front end and a heel end, said heel end rotatably interconnected to said handle at a central point of rotation, wherein said knife blade travels between a first extended position coextensive with said handle and a second closed position with at least a portion of said knife blade received in said cavity;
• a leaf spring with a stopping arm interconnected to said handle and positioned within said cavity of said handle for securing said knife blade in said first extended position, said stopping arm operably biased to extend into said cavity when said knife blade is in said first extended position;
• a stud interconnected to said knife blade proximate to said heel end and offset from said central point of rotation of said knife blade, said stud extending outwardly from said knife blade and into an arcuate shaped recess positioned within said first scale;
• a safety latch slidably interconnected to said first scale and interconnected to a locking arm for releasable engagement with an outer circumference of said stud;
• a substantially rigid shim plate positioned between said heel end of said blade and one of said scales, said shim plate having an arcuate cut-out portion for receiving said stud, wherein said knife blade may rotate between said first extended position and said second closed position when said safety latch is not in contact with said stud;
• and
• an elongated slot defined between an outer surface of said first scale and said cavity for receiving said locking arm and permitting said safety latch and locking arm to travel between a first locked position and a second released position, wherein in said first locked position said knife blade is substantially locked in said first extended position coextensive with said handle.