Barbed wire - line element structures including fences (fences). It performed in two (at least three), helically twisted steel wires. They are wound with an interval of short lengths of wire, beveled ends that protrude more ten millimeters. Properties describe the barbed wire:
- carrier wire thickness,
- the distance between the teeth and the number of spikes projecting ends(2 or 4).
Razor barbed wire mounted on top of fences, made of a mesh, or it is the entire plane, consisting of parallel wires to ground at intervals 20-40 cm. Sometimes, to complicate the work of hackers, the area is protected against the penetration of – barbed wire in a spiral shape (several tens of centimeters in diameter). These coils are often further connected to each other.
In some of the Nazi concentration camps, part barbed wire was further connected to a source of high voltage.
The idea goes back to the creation of 1865 year. French inventor Louis Janine first used as a definition of the barbed wire (fr. yarn made Barbel?). first, who patented the invention, It was the American Joseph F. Hlydden in 1874 year.
Glidden received a patent (№ 157 124) In November 1874 of the year. A little later, the businessman Isaac Elvud bought from Glidden order 50% copyright and as a result they have jointly launched a factory for the production of barbed wire Barb Fancy Company. Soon gained a huge success and made 5 tons in 1876 and almost 159 tons in 1878 year.
The first application of the new invention find breeders of cattle for the western United States, где паслись большие стада на огромных территориях, которые не были огороженными традиционным способом, t. it is. wooden fences.
In John. Gates, barbed wire presented in San Antonio in Texas 1876 year. Presentation, which aroused understandable interest of breeders, ended invitation for ordering. Gates, I contacted by Washburn and Elwood, and he founded the Southern Wire Company, which has become the largest manufacturer of wire.
AT 1880 , a federal district court ruled, confirming the validity of the patent Glidden, Recognizing its monopoly. This was confirmed in 1892 , the United States Supreme Court. In this situation 1898 , Gates was forced to acquire ownership of the partners and Glidden Elvuda, thereby legalizing its activities. Later, his company absorbed the United States Steel Corporation.
