DE224669C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

■ - JVl 224669 CLASS 78 e. GROUP

FRANCOIS HYRONIMUS in CUGNY, France.

Ignition set for detonators or the like. Patented in the German Empire on January 26, 1908.

For this registration, the examination according to the Union Treaty of

March 20, 1883

December 14th [900 recognized on the basis of the registration in France of February 14th, 1907.

the priority

Since the discovery of hydrazoic acid, several attempts have been made to use it of nitrogen silver and nitrogen mercury as a primer for primers made and described in public pamphlets. But the attempts have mainly because of the danger associated with making these azides, not a practical one Result; furthermore, the salts of silver and mercury are too expensive to to allow industrial use of the substances.

The present invention now aims to produce such detonators thereby to make it much cheaper that nitrogen lead is used for charging. This body is not only of higher specific weight and much cheaper than silver nitrogen and Mercury nitrogen, but can also be

ao can be made from safe.

The invention consists only in the use of nitrogen lead (N ³ J ₂ Pb. For the production of detonators. This body, the properties of which has been little known until now, has the same properties as fumed mercury, that is, its suitability by impact, ignition and so forth causes a very vigorous molecular shock capable of causing the detonation of common explosives such as dynamite, F a four see explosives, gun cotton, etc.

The nitrogen lead primers are made in the same way as the primers, where fumed mercury, be it alone or in association with other bodies, is used.

For the safe production of nitrogen lead, the following process can be used, which essentially in particular with regard to the action of nitric oxide on sodium amide for the production of azides is known (patent 66813, class 78) can be used.

The sodium amide is produced in a known manner by allowing a jet of dry ammonia gas to act on molten sodium. This amide is then treated with dry nitrogen oxide at a temperature of 300 ^° C., as a result of which the amide in the melting process is transformed into sodium nitrogen, which is solid at the temperature at which one works. After cooling, the sodium nitrogen is dissolved in water and the resulting alkaline solution is precisely neutralized with dilute nitric acid, whereupon lead nitrate is added to the neutral solution.

The nitrogen lead precipitates in crystals, the size of which depends on the one used Temperature is different.

Claims (1)

The crystalline precipitate is collected on the filter with fresh water washed out and dried at a temperature less than 100 ". The nitrogen lead is then ready to be used just like fatal mercury to charge detonators to become. The theoretical procedure described above is practically carried out as follows. ίο Since nitrogen Atrium does not melt at a temperature of 300 ⁰ C., melt the amide contrast, at this temperature, has to work the nitrous oxide difficulty, once a certain amount of nitrogen Atrium has formed, so that it absorbs the not yet decomposed amide. This has an unfavorable effect on the duration of the process and, in relation to the amount actually required, a far too large amount of nitrogen oxide is used. It is therefore expedient to divide the sodium amide by letting it be absorbed by a non-meltable, anhydrous and porous body which does not react to the various compounds which occur during the reaction. Pumice, kieselguhre, etc., cannot be used for this purpose, since the caustic soda that forms would make the reaction even more difficult and reduce the yield because it acts on the silica of these substances. Anhydrous bodies, such as lime, magnesia, sodium sulfate, etc., are therefore used, which, like the amide, are ground and then spread over the largest possible area in suitable containers. It is then heated to a maximum of 200 ^° . When the amide melts, it is absorbed by the lime so that the nitrogen oxide can easily penetrate the mass and act. If necessary, they can be worked through mechanically. The mass obtained is washed out with water and then treated as described above. Godfather NT-A ν SPRU c η: The use of nitrogen lead as a Ignition kit for igniter or the like.