An automatic knife (also known as a shift knife, automatic knife, button knife, ejection knife, punch knife, punch blade, or spring knife (Sprenger, Springer) is a type of knife with a sliding or pivoting blade contained in the handle that automatically extends by a spring when a button, lever or switch on the handle or. While most of the laws surrounding automatic knives are specific to each state, the Federal Automatic Knife Act describes how knives are treated in the United States with respect to trade and across state lines, and what qualifies them to be an automatic knife. Any automatic knife that opens automatically, whether by a button, inertia or gravity, is an automatic knife. This wording is carefully designed to include butterfly and gravity knife styles in the automatic knife category.
While most automatic knife laws are specific to each state, the Federal Automatic Knife Act describes how knives are handled in the United States in terms of trade and across state lines, as well as what qualifies a knife as an automatic knife. An automatic knife is an automatic knife that opens automatically, either with a button, inertia, or gravity. In the automatic knife category, this phrase is deliberately worded to fit butterfly and gravity knife designs. Automatic knives, despite being an automatic opening knife, are generally no faster in drawing than a blade that has assisted opening machinery.
This makes one wonder what the real advantage is for them, since they are more likely to be deployed accidentally, cause more legal problems, and also have locking issues. According to a law passed in 1958, the definition of an automatic knife in New York is “any knife that has a blade that opens automatically by hand pressure applied to a button, spring, or other device on the knife handle, and possession of such a knife is considered fourth degree criminal possession of Los Type names are self-explanatory, but to be clear, OTF knives cause the blade to pop out of a hole in the top of the knife using some type of track with a push bar and side opening blades fold up like a standard pocket knife. A knife that contains a spring, detent, or other mechanism designed to create a bias toward closing the blade and that requires an effort applied to the blade with the hand, wrist, or arm to overcome the bias toward closure to help open the knife. A good indicator of whether a blade is considered an automatic knife or an assisted opening knife is what the rest position of the blade is.
The term “pocket knife” encompasses and can mean a variety of different styles and types of knives, however, there is a kind of general definition that can shed some light on what exactly qualifies as a pocket knife. When closed, this knife measures 5.9 inches and stretches to a length of 8.94 inches when fully open, making it slightly larger than an average pocket knife, but small enough not to require specialized support. A gravity knife is a knife with a blade contained in its handle and that opens its blade by the force of gravity. No one under the age of 18 can carry a dangerous knife to a public building, and no one under the age of 18 can carry a knife larger than 3 inches for illegal purposes.