US1991731A - Priming mixture - Google Patents

Description

Patented Feb. 19, 1935 t PATENT. OFFICE PBIIVHNG MIXTURE 7 James E. Burns, Bridgeport, Conn., assignor to Remington Arms Company, Inc., a corporation of Delaware.

Ne Drawing. Application May"2e, 19s1, 1 SerialNo; 540,1 9?

5 Claims." 101. 529-4) This invention relates to 'p-riming mixtures, particularly priming mixtures of thenon-corrosive type, and contemplates certain 'mixtures utilizing as an oxidizer certain materials the use of which has already been proposed in a general way but not fully developed. Ammunition priming mixtures fuel, or substance to be oxidized; an oxidizento furnish the oxygen necessary for. the oxidizing of the fuel; and, a combustion initiatonhaving the function of starting the reaction between the fuel and the oxidizer. It is not necessary that 7 either the fuel or the oxidizer in themselves be subject to decomposition, under the stimulus of G a blow. The combustion initiaton'however, must be sensitive to shock, its decomposition being Y productive of sufiicient heatand. pressure to cause reactionbetween the oxidizer andfuel.

A non-corrosive oxidizer which has been used with'a substantial" measure of successis lead nitrate. This material, however, isopen to the objection that-it appears to give certain types oifj mixtures acidic'characteristics, and in this manner is probably responsible for certain reactions resulting in the deterioration of such mixtures under adverse" conditions of temperature and fuel and friction supplying materials generally,

humidity. -Aside from thischaracteristic, the

i 1 material is'an excellent-priming mixture oxidizer. 30

a the basic lead salt of nitric acid (PbOHNO3) as The present invention contemplates the useof a priming mixture ingredient; The use of this salt is suggested'butnot fully. disclosed, in German Patent .No. 497,460, issued May 8, 1930, to Rathsburg and Stadler. .Saidpatent contains a general suggestion'of the use of {basic lead nitrate with certain named combustion initiators, and

- without makingany definite disclosure of any mixture in which basic lead nitrate is successful.

r The present invention contemplates the use of basic leadnitrate in certain actual'successful mixtures. Generally stated, the combustion initiators used are guanylnitrosaminoguanyltetracene, lead styphnate," basic lead picrate, anddir i as V ordinarily made comprise three classesof ingredientsi a',

azodinitrophenol. The fuels used in various basic lead nitrate mixtures includelead sulphocyanate, antimony. sulphide, calcium silicide, and the recently discovered lead salts of dinitrosalicylic acid.

5 Typical successful basic lead nitrate mixtures are as follows:

Goanylnitrosaminoguanyltetracne. 27 3% 3% 2% Lead styphnate l i. 40 38% 40 30 10 Basic lead picrate 45' Diazodinitrophenol 6 Basic lead nitrate 30 30 r 39 26 30 Lead sulphocyanate 8 '8 8 Lead dinitros'alicylate 7 13 Antimony sulphide-.. 5 Calcium silicide- 5 lass"; t 18 18 lo Gum l The lead dinitrosalicylate in the above table may be, either the normal or a basic lead saltof dinitrosalicylic acid. These mixtures have been 20 found topossess the requisite ,sensitiveness and priming capacity, and to be extraordinarily resistant to conditions of high temperature and humidity. V I

This invention comprising the first discovery of 5 actual mixtures utilizing basic leadnitrate as an oxidizer, the appended claims are to be broadly construed.

What is claimed is: ,7 a

.1. A'priming mixture containing basic lead nitrate, a guanylnitrosaminoguanyltetracene, and lead styphnate. i V V t 2. A priming mixture containing basic lead nitrate, basic lead "picrate, and guanylnitrosaminoguanyltetrecene. V V

3. A priming mixture containing basic lead nitrate, a lead salt of dinitrosalicylic acid, and diazodinitrophenol. n r V 4. A priming mixture containing basic lead nitrate, and a combustioninitiator selected from 40 the group consisting of guan'ylnitrosaminoe.

nitrate, lead styphnate, and diazodinitrophenol;

JANIES BURNS;