US1748455A - Delay powder - Google Patents

Description

Patented F eb. 25, 1930 mates FRIEDRICH OLSEN, DOVER, NEW JERSEY DELAY, rownnn No Drawing.

The subject matter of the present invention is a delay powder. The primary object of this invention is the provision of a slow burning composition especially adapted for use as a delay.

I With the foregoing and other objects in view, my invention resides in the novel arrangement and combination of ingredients hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of What is claimed without departing from the spirit of the invention.

Heretofore, black powder has most generally been used as a delay element in fuses, propellants, and indeed wherever a delay is desired. While in many ways suited for this purpose, because of its cheapness and ease of preparation ordinary black owder has certain disadvantages, the principal one of which, at the present time,-is the impossibility of regulating the rate of burning. I have found, however, that if the proportions of the ingredients in black powder or a powder having a similar composition are modified so as to permit the addition of a deterrent, the desired rate of burning may be attained while at the same time the resultant composition willanswer all the purposes of a-delay.

The powder which forms the subject of my invention may be made directly by varying the proportions of theblack powder ingredients so as to permit the addition of the necessary amount of a deterrent'agent or by mixing sulphur, charcoal and any equivalent of potassium nitrate .withthe necessary amount of deterrent. v i A composition which has provedsuccessful m practice is as follows:

. Percent Charcoal- 15.3 Sulphur r v 8.4 Potassium nitrate'..-- 74.1

Triphenylphosphate 2.2

While the composition-cited in thelformula given has met all requirements, I do not pro pose to limit my invention to theproportions an or ingredients used. For potassium nitt ate Application filed October 30, 1928. Serial Ila-671,751; I

any other suitable oxidizing agent such as sodium nitrate or barium nitrate may be sub. stituted, and instead of the tripheny-lphosphate an other suitable deterrent. maybe employe such as camphor, dimethylphenl. orthotolylurea, diphenyl .dimethylurea, dinitrotoluene or petrolatum. The quality of the charcoal may also be varied from hard v burned to soft burned and the source of this charcoal may be willow, alder, weeds, etc. =0 I It has been found further that by changing v the percentage of the deterrent, in the com;-

position that the rate of burning. may be altered.

A powder made according to the vformula outlined or having any similar composition ma be made by anyz/well known method 0 ma 'ng black powder a A delay compositiiin made according to my invention has been found'es cially useeluding charcoal, su phur,1a nitrate of an f alkali earth metal and triphenylphosphate. I

4. A slow burning powdercomposition-imeluding charcoal, sulphur, a nitrate and-#5 triphenylphosphate. e

5. A slow burnin powder com ositionineluding charcoah'su phur, an oxi zing agent and triphenylphos hate.

REDRIGH OLSEN;