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Concertina wire or Dannert wire [1] is a type of barbed wire or razor wire that is formed in large coils which can be expanded like a concertina. In conjunction with plain barbed wire (and/or razor wire/tape ) and steel pickets , it is most often used to form military-style wire obstacles .
Foxhole radios consisted of a wire aerial, a coil of wire serving as inductor, headphones, and some sort of improvised diode detector to rectify the signal. Detectors consisted of an electrical contact between two different conductors with a semiconducting film of corrosion between them. They were devised from various common objects.
Razor USA LLC, better known as Razor, is an American designer and manufacturer of manual and electric scooters, bicycles, and personal transporters. The company was founded in Cerritos, California in 2000 by Carlton Calvin and the JD Corporation. [1] Razor also owns the RipStik, Sole Skate, and Pocket Pros brands. [2]
The butterfly safety razor utilizes a twist-to-open mechanism head to make changing the blade easy and convenient. Variations in razor head designs include straight safety bar (SB), open comb (OC)(toothed) bar, [33] adjustable razors, and slant bar razors. The slant bar was a common design in Germany in which the blade is slightly angled and ...
The wire drawing process is quite simple in concept. The wire is prepared by shrinking the beginning of it, by hammering, filing, rolling or swaging, so that it will fit through the die; the wire is then pulled through the die. As the wire is pulled through the die, its volume remains the same, so as the diameter decreases, the length increases.
The first rubber-insulated cables for US building wiring were introduced in 1922 with US patent 1458803, Burley, Harry & Rooney, Henry, "Insulated electric wire", issued 1923-06-12, assigned to Boston Insulated Wire and Cable . These were two or more solid copper electrical wires with rubber insulation, plus woven cotton cloth over each ...
Razor wire—long-barb type on top of a chain link privacy-fence surrounding a utility power sub-station. Barbed tape or razor wire is a mesh of metal strips with sharp edges whose purpose is to prevent trespassing by humans. The term "razor wire", through long usage, has generally been used to describe barbed tape products.
Schick is an American brand of personal care products and safety razors which was founded in 1926 by Jacob Schick.It is currently owned by Edgewell Personal Care.. In the 2000s, Schick was second in sales to Gillette globally and was the top-selling brand of safety razors and blades in Japan. [1]