US1690872A - Nitroglycerin dynamite - Google Patents

Description

Patented Nov. 6, 1928.

NETED STATES PATENT OFFICE.

THOMAS OHERN, OE KEW GARDENS, NEW YORK, ASSIGNOR TO ARTHUR '1. O HERN, OF

KEW GARDENS, NEW YORK.

NITROGLYCERIN DYNAMITE.

No Drawing.

some of which have been permanent in char- I acter. It has therefore been sought to obtain a-nitroglycerin dynamite which was fumeless and without deleterious eifect upon the health but, so far as'the inventor is aware,

without success. It has therefore been customary to employ gun gelatins or gelatin dynamites which are gun cottons saturated with nitroglycerin in various proportions and which are expensive and require special handling.

One of the objects of this invention is therefore to present a nitroglycerin dynamite which gives off no poisonous gases or fumes upon detonation, and therefore is excellently adapted for subterranean work, since the workmen are permitted to immediately return without a preliminary ventilation. It has been employed successfully in underound work in tunneling, mining, etc., and is especially valuable where the ventilation is poor.

According to this invent on, a nitroglycerln dynamite is prepared with a combined organic and inorganic absorbent material, and with an inorganic oxygen-bearing substance 40 to produce fumeless, odorless, and nondangerous resultant products. The requirements of oxygen and the supply of oxygen available are carefully balanced 1n the explosive for this purpose, and the further ingre- Application filed April 2, 1926. Serial No. 99,404.

dients added assure this effect when the mixture is detonated. r

In order to produce 300 lbsrof a product of 60% equivalent strength, the following proportions of ingredients may be employed:

. I Nitrate of soda 64 Infusorial earth -Q 30 Wood flour 20 Potassium nitrate 3 Magnesium carbonate, ground 3 N'troglycerin I In making the mixture, the nitrate of soda and infusorial earth are thoroughly mixed n a waterproof vessel and then the other dry ingredients are added and the whole mixed 4 again. The nitroglycerin is then added and the mass again mixed very thoroughly, I Y

The oxygen balance of this compound is so perfect that all poisonous gases and fumes burn each other up, so to speak, and no disagreeable odor is left.

While the above compositionis the preferred form and has given good'resulta'it will be understood-that other inorganic oxygen-bearing substances may be employed in proper proportion, such as manganese dioxide and potassium chlorate; Y

I claim 1. A sixty percent nitroglycerin dynamite containing sixty-four parts by weight of sodium nitrate, thirty parts by weight of infusorial earth, twenty parts by weight of so comminuted wood product, three parts by weight of potassium nitrate, three parts by. weight of ground magnesium carbonate, and one hundred eighty parts by weight of nitroglycerin. g t v 2. A high explosive nitro-glycerin dynamite free from nitrocellulose, containing organic and inorganic absorbent material and an inorganic oxygen-bearing and releasing terial, and bein approximately nine parts agent, said organic absorbent material being by weight of mtro-g cerin to three parts a comminuted wood product, the free oxyby weight of oxygenearing agent to one 10 gen of said agent liberated at detonation bepart by weight of organic absorbent material.

5 ing at least in a chemically equivalent pro- In testimony whereof, I aflix my signature;

portion to oxidize the gases given 01f by said nitro-glycerin and said organic absorbent ma- THOS. OHERN.