Pantographic knife

A pantographic knife or paratrooper knife is a folding knife whose blade is opened by a unique scissors method. The blade has a slightly longer tang than a folding knife heel. The handle is symmetrically segmented and articulated to fold away on both sides to grip the longer tang. The manner is similar to a butterfly knife (also called a Balisong knife after its modern place of origin)—with which it is often confused. Unlike the balisong knife handles that swing freely and independently, the pantographic knife uses a pantograph linkage to keep the handles aligned during opening and closing. The mechanism includes a collar that travels up the blade. The pantographic knife is very strong when compared to most other folding knife designs, being joined at several points and along several planes—this increases the force required to break the blade away from the handle. By enclosing the blade on both sides, double edged blades can be used.

This knife is also known as a paratrooper knife, although it was never issued as such to Airborne forces. It may have gotten this name because it resembles an OTF gravity knife which was used by German paratroopers.

History

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Examples of pantographic knives with patent markings D.R.G.M. (Deutsches Reich Gebrauchsmuster) indicate production in Germany during the Second World War, but do not imply military issue. Although this design predates Second World War, records of German paratroopers having genuinely been issued pantographic knives have not surfaced. To complicate identification, samples made with German army markings (brass handles with text in English language) seem to be post-war (1948) marketing attempts capitalizing on the term paratrooper.

Function

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In this illustration:

Figure A shows the closed knife, with blade retracted.
Figure B shows the pantographic legs opening. The collar is shown sliding down the blade.
Figure C shows the blade almost extended.
And finally, Figure D shows the pantographic legs folded together, making a handle that is half as long as when the knife was closed.

References

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Daggers	Anelace Applegate–Fairbairn fighting knife Arkansas toothpick BC-41 Bagh nakh Balarao Baselard Bichuwa Bollock dagger Cinquedea Dha Dirk Ear dagger Emeici Facón French Nail Gunong Hunting dagger Jambiya Jile Kabutowari Kaiken Kalis Katar Khanjali Khanjar Kris Kunai Liaoning dagger Mark I trench knife Microtech Jagdkommando Parrying dagger Poignard Pugio Push dagger Rondel dagger Seme Shobo Sica Stiletto Tantō U.S. Marine Raider stiletto V-42 Yoroi-dōshi
Manufacturers	Aitor Knife Company Al Mar Knives American Tomahawk Company Aritsugu Benchmade Böker Buck Knives Camillus Cutlery Company Cattaraugus Cutlery Company Chris Reeve Knives Chroma Cnife Clauss Cutlery Company Cobray Company Cold Steel Columbia River Knife & Tool Cuisinart Cutco Dalian Hanwei Metal Dexter-Russell Ek Commando Knife Co. EKA Emerson Knives F. Dick Fällkniven FAMAE Fiskars Gerber Legendary Blades Füritechnics Glock Ges.m.b.H. Imperial Schrade Ivan's Ka-Bar Kershaw Knives KitchenAid Korin Japanese Trading Company Kyocera Leatherman Mad Dog Knives Marble Arms Medford Knife and Tool Microtech Knives Morseth Muela Murphy Knives OLFA Ontario Knife Company Opinel Randall Made Knives Ranz Cuchillos Rösle Sabatier Shun Cutlery Slice, Inc. SOG Specialty Knives Spyderco STI Knives Strider Knives Thiers Issard TOPS Knives Tramontina Victorinox W. R. Case & Sons Cutlery Co. Carl Walther GmbH Wenger Western Knife Company Wilkinson Sword Wüsthof Yoshida Metal Industry Global Zero Tolerance Knives Zwilling J. A. Henckels
Knifemakers	Rex Applegate James Black Tom Brown Jr. Blackie Collins John Nelson Cooper Jack W. Crain Ernest Emerson Jerry Fisk Bill Harsey Jr. Phill Hartsfield Gil Hibben Jimmy Lile Bob Loveless William F. Moran Ken Onion Ralph Osterhout Bo Randall Chris Reeve A. G. Russell Jody Samson William Scagel Mike Snody Robert Terzuola Michael Walker Buster Warenski Daniel Winkler
Associations	American Bladesmith Society Cutlery and Allied Trades Research Association Knifemakers' Guild
Category:Knives / Daggers