To deliver a fire charge to a blasting capdevices use a variety of methods. You can use gasoline spilled from the charge to the fuse point, or spill gunpowder. Also, a powder stop is applied, which is placed in a paper package, or other available methods. However, they are not reliable, since they can not provide an accurate burning time at a certain distance, they can not be used in bad weather or a specific landscape.
At one time was very popular string beads,He could cope with almost any task of those times. It was made in advance, which made it possible to conduct blasting operations without delay. It could burn even with a slight rain and wind, and also gave a clear idea of the time of detonation, since the main substance in it was a powder stop, having a certain burning time (one second per one meter of cord).
Another feature that possessed bikfordovcord, was its elasticity. It can be twisted white, easy to carry, and in the preparation of the explosion wrap for any obstacle, which allowed the sappers to install charges at short distances, while they themselves could be in cover.
Such properties of bikfordov cord, fabricationwhich consisted in the winding of the stoppile with textiles, was obtained thanks to the design. The fact is that the active substance was wrapped in a layer of tissue that was impregnated with gunpowder. This ensured uniform combustion and prevented damping. Next, a second layer of textiles was applied, which was lubricated with bitumen. It protected it from moisture, imparted additional elasticity, and in the process of burning supplied the bikfordi cord with oxygen, which was very important.
However, this fire-proof cord also had its ownlimitations. He did not tolerate negative temperature, because of what he broke and crumbled. It could also be damp, and in conditions of high humidity or in water it was practically useless. That is why today it is considered obsolete, and during the blasting operations of the bikfordov cord is almost never used.
There are many other fires thathave significantly better performance and reliability. At the same time, their manufacture is much simpler and cheaper, which allows to significantly reduce the cost of blasting. Bikfordov cord buy today is almost impossible. Although most stores sell other fenders made using a different technology and using other elements, but which have exactly the same name. It can be said that only the name remains from the original invention of the past centuries, which is firmly entrenched in people's minds.
Thus, the Bickford cord can be purchased inany specialized store or extract from modern pyrotechnics. In this case, the received copy will be similar to the original of the past years only visually. In fact, this is a completely different device that meets modern needs and operating conditions.
