DE54818C - Process for the production of a smokeless, progressively acting skewed wool powder from highly nitrated cellulose - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 78: Explosives.

nitrated cellulose.

Patented in the German Empire on November 22nd, 1889.

The present invention aims to make the pyroxyline by regulating its combustion to make ballistically usable.

The tremendous power of nitrated cellulose, 1 its lack of smoke, residue and noise, its light, cheap and, because of the elimination of any grinding operation, relatively harmless production method, their insensitivity to water and moist air - all advantages in which they nor has it been achieved by any of the picrate and nitrate mixtures that emerged later is - immediately after their discovery aroused the definite assumption that it would be in the war technique an era of crooked wool followed that of gunpowder.

These hopes have not yet been fulfilled.

Tests that have been going on for decades have proven the durability of acid-free leaning wool undoubtedly proven; it has been found that even in the dry state of any shock defies, which is not exactly as violent as that of the projectile charge when firing the Guns, in the wet, but not otherwise than ignited by a special detonator can; But one thing never wanted to succeed: once the combustion had been initiated, it was possible the nitrocellulose does not behave like a detonation which damages or smashes the cargo space of the firearm, before the projectile has had time to overcome its indolence and become the Adapt barrel soul.

The reason for these failures is probably to be found on the one hand in the fact that one goes as far as the in the last time when the photographic practice of the 'Collodium took hold and closed Investigations also stimulated the low-nitrided crooked wool steps, almost exclusively the very suitable for blasting because of their extreme explosiveness, but ballistically unsuitable Hexanitrocellulose (then called trinitrocellulose) and, on the other hand, that it was known one, regardless of the desired progressive effect, the crooked wool loads, like those of black powder, always made homogeneously from a crooked wool and only through Changes in shape (spinning, pressing) or even dilution with other substances tried to slow down the combustion.

The invention consists in the fact that the inventor does not make his charges from a crooked wool läfsl exist, but every single grain of the charge (for handguns one uses most advantageously a single grain of the approximate size of the cargo space) Layers of different oxygen content, hence also of different burning rates, are composed in such a way that the movement of the bullet is initiated by igniting less explosive locations, in order to then reproduce in more and more oxygen-rich layers up to the maximum to be accelerated.

This progressively acting skewed wool powder is manufactured by using pressed skewed wool the highest nitration level for a period of time under the action of a reducing agent (alkali) suspends. The reducing agent works naturally

on the outermost layers of the grain most strongly / a; the same become the lowest Collodium levels are reduced, while after the unchanged core they become more and more explosive Layers follow one another.

. ■ ·. 'So the presentation is quite extravagant simple and, apart from a few vats with inlet and outlet pipes, does not require any special technical facilities.

In the vats there is the pressed lopsided wool, as is found in the factories in sufficient quantities Deliver purity and in any desired grain size, while still moist (dry leaning wool if the reducing agent would be sucked in too quickly) lye was poured over it, then with pure Rinsed with water and dried. Any remaining nitrate can make the powder less explosive and increases the backlog by a small amount.

If you use z. B. Potasche as a reducing agent, corresponds to about ι 5 percent. solution quite good for the purpose. It is allowed to act on the skewed wool until it no longer reacts alkaline. The quantity of the lye is to be measured in such a way that that contained in it Alkali is sufficient to make the trinitrocellulose about 25 pCt. to withdraw their nitric acid content; of course it always has to be based on the type of weapon for which one the powder is intended.

The nature of such a powder cannot be determined by chemical analysis; it finds only collodion and skew-wool, which is insoluble in ether. Only when you do that Cut through the grain and treat it with iodine, can be seen from the yellow color of the kernel and the blue coloring of the outer surface, which two colors gradually merge into one another pass over the progressive structure.

Like the bolt of a blowpipe through gradually increasing blowing with the least amount of effort the archer's lungs are driven the farthest, and like a wind gun with it a given quantity of air of a given tension produces the sharpest work, if the curve of the valve conch for initially slow, then progressive to a strong end product increased air outflow is set up, one achieves with the different explosive crooked wool types compound powder have a stronger ballistic effect than with the same quantity of highly nitrided skew-wool, the absolute strength of which is naturally greater.

Claims (1)

Patent claim: Process for the production of a smokeless, progressively acting skew wool powder, whose individual grains consist of layers of increasing explosiveness towards the core partial reduction of pressed, highly nitrated cellulose by means of alkaline lye.