The small restraining pin at 3 is the only thing holding the blade open and is prone to failure if abused. This allows reverse force on the thumb stud to increase tension in the main spring before the upper restraining pin releases and the blade and carrier can return to the closed position.
A tab on the left spring carrier fits into a hole in the blade at position 4 which restrains the left spring carrier. Momentum carries the blade further before flanges (not shown) retard its motion.Īnother restraining pin at position 3 fits into a notch and locks the blade in the extended position. The right spring carrier moves only a short distance before it comes to rest in the slide.
#Lever lock automatic knife free#
When the pin evacuates the notch, the blade and right spring carrier are free to move. A ramp on the slide impinges on the lower pin. This increases tension on the main spring as the blade and right spring carrier are locked. When the thumb stud is pushed forward the slide and left spring carrier are free to travel. Tension on the main spring (red zig-zag) holds the other spring carrier, slide and thumb stud (light grey) to the right. The right spring carrier is restrained by a tab at position 2 that fits over the end of the blade. The two spring carriers (green) fit into the spaces on the slide (blue) and this assembly rests to the side of the blade. The knife blade (dark grey) is locked in position by a spring-loaded restraining pin (yellow and red) fitting into a notch in the blade at position 1. See also: Sliding knife Double action OTF knives Schematic of double action out the front automatic knifeĪ double action out the front knife is so-called because the blade emerges from the front of the handle and the thumb stud can be moved forwards or backwards to extend or retract the knife respectively. Manipulation of a lever, slide button, bolster, or picklock releases the blade for closure. Side-opening knives may feature a safety mechanism that prevent the accidental actuation of the blade release mechanism. These resemble traditional manually-operated folding knives, but feature a coil or leaf spring which powers a blade that is released when the activation button is pressed. The most common type of switchblade is the side-opening or out-the-side (OTS) knife. Length 7.85- inches Blade length 3.4 inches. Auto knife push button operation with side mounted safety, reversible clip. Method of operation A side opening (left) and out the front (OTF) knife Side-opening Benchmade 4300 CLA Composite Lite Auto.
Congress banning the manufacture and sale of switchblades, beginning a wave of legal restrictions worldwide and a consequent decline in their popularity.
Delaney of New York authored the first bill submitted to the U.S. It is unlocked by a mechanism that allows the blade to be folded and locked in the closed position.ĭuring the 1950s, US newspapers as well as the tabloid press promoted the image of a new violent crime wave caused by young male delinquents with a stiletto, switchblade, or flick knife, based mostly on anecdotal evidence. Virtually all switchblades incorporate a locking blade, where the blade is locked against accidental closure when the blade is in the open position. A folding switchbladeĪ switchblade (also known as switch knife, automatic knife, pushbutton knife, ejector knife, flick knife, Stiletto, flick blade, or spring knife ( Sprenger, Springer )) is a pocketknife with a sliding or pivoting blade contained in the handle which is extended automatically by a spring when a button, lever, or switch on the handle or bolster is activated. Strong release and very sharp blade with beautiful REAL wood handles.Not to be confused with Assisted-opening knife. I love them and everyone that I have given them to loves them This is a very good knife, well made and worth the money.
#Lever lock automatic knife upgrade#
u will definatley want to upgrade the sheath I applied a liberal coating of gun grease (Hoppes) and some other gun lubes to the front hinge (which was really tight) and gradually it began to smooth out. Upon initial receipt the blade would NOT fully extend. Posted by Matthew Smeltzer on 25th Jan 2023 Very crisp lock up when pressed open with lever.
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