A trench knife is a combat knife designed to kill or incapacitate an enemy at close quarters, such as in a trench or other confined area. It was developed as a close combat weapon for soldiers attacking enemy trenches during the First World War. An example of a World War I trench knife is the German Army's Nahkampfmesser (close combat knife).
During the Second World War, the trench knife, by this time also called a combat knife, was developed into new designs. On the German side, the Nahkampfmesser and associated knives were widely issued to the ordinary soldier for combat and utility purposes, while Allied armies mostly issued trench knives to elite infantry units and soldiers not equipped with the bayonet.
With the exception of the German Nahkampfmesser (or close combat knife), most early trench knives were fabricated by hand by individual soldiers or blacksmiths for the purpose of silently killing sentries and other soldiers during trench raids. These early "trench knives" were often shortened and sharpened Army-issue bayonets. One type of stabbing weapon, the French Nail, was made by cutting and pointing the steel stakes used to support the barbed wire protecting trenches. Some historians say that some trench knives models were inspired by the Bowie knife.
Soon afterwards, these fabricated trench knives were used in defensive close-quarters trench warfare, and such fighting soon revealed limitations in existing designs.
A more elegant form of the French Nail was the Poignard-Baïonnette Lebel M1886/14. Approved as a standard military infantry weapon after its development by Lieutenant Colonel Coutrot of the French Army, the Poignard-Baïonnette Lebel consisted of a long, needle-pointed, stiletto-profile blade with wooden handle and an integrated knuckle guard made of steel. Originally a conversion of the French Épée-Baïonnette Modèle 1886 (bayonet), and designed strictly as an offensive weapon, the Poignard-Baïonnette Lebel used a section of the M1886 Lebel's long, narrow stiletto-type cruciform blade, designed to quickly kill an enemy soldier with a deep thrust.
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A fighting knife has a blade designed to most effectively inflict injury in close-quarters physical confrontations. The combat knife and the trench knife are examples of military fighting knives. Fighting knives were traditionally designed as special-purpose weapons, intended primarily if not solely for use in personal or hand-to-hand combat. This singleness of purpose originally distinguished the fighting knife from the field knife, fighting utility knife, or in modern usage, the tactical knife.
A combat knife is a fighting knife designed for military use and primarily intended for hand-to-hand or close combat fighting. Since the end of trench warfare, most military combat knives have been secondarily designed for utility use (clearing foliage, chopping branches for cover, opening ammunition crates, etc.) in addition to their original role as close-quarter combat weapons, and may be referred to as "fighting-utility knives.
Ka-Bar (ˈkeɪ.bɑːr; trademarked as KA-BAR) is the contemporary popular name for the combat knife first adopted by the United States Marine Corps in November 1942 as the 1219C2 combat knife (later designated the USMC Mark 2 combat knife or Knife, Fighting Utility), and subsequently adopted by the United States Navy as the U.S. Navy utility knife, Mark 2. Ka-Bar is the name of a related knife manufacturing company, Ka-Bar Knives., Inc. (formerly Union Cutlery Co.), of Olean, New York, a subsidiary of the Cutco Corporation.
We present in this work the fabrication of high aspect ratio nanopores in 500 nm PECVD SiC films through AAO (anodic aluminum oxide) mask. The initial AAO thin film is 180 nm thick and the diameter of nanopores is 33 ± 7 nm. We have used three plasma chemi ...
IEEE2013
A method for driving piezoelectric elements of a micro-system. The piezoelectric elements comprising a ferroelectric thin film, and being configured to be part of any one or a combination of items of a list comprising: a cantilever, a bridge, a diaphragm, ...
2020
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This paper reports on the fabrication of sub-micron trenches on silicon-on-insulator (SOI) required in many MEMS devices and on bulk silicon. Trenches in the range of 100-500 nm had been etched with the deep reactive ion etching (DRIE) by using the SHARP ( ...