US991232A - Explosive. - Google Patents

Description

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GERSHOM IVIOOBE PETERS, CINCINNATI, AND MILTON FLETCHER LINDSLEY, 0F KINGS MILLS, OHIO, ASSIGNORS TO THE KING POWDER COMPANY, OF CINCINNATI,

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To all whom it may concern:

Be it known that we, Gnns oM M. lnrnns, residing at Cincinnati, county of Hamilton, and State of Ohio, and MILTON F. LINDSLEY, residing at Kings Mills, county of lVarren, and State of Ohio, both citizens of, the Uited States, have invented certain new and useful Improvements in Explosives, of

exact specification.

The invention relates to high explosives equaling in strength the higher per cents. of standard dynamite.

Black powder for blasting purposes is not of suflicient strength for most rock work, and is not capable of throwing out the tougher kinds of coal and slate often accompanying the same. It also shatters the softer grades of coal and renders much of it unsalable. It emits an offensive gas and causes such an obscuring smoke as toseriously interfere with the workmen. It also is liable by its excessive flame to set off any damp or explosive gasthat may be lurking in themine, causing. often great destruction to life and property. It is also more or less dangerous with respect .to transporting and storing, as it may be easily set off by a spark or fire.

Dynamite as generally known and used is open to many objections. It freezes at fortyfive degrees temperature, and when frozen will not explode or detonate, and is practi- The thawing of it out is attended often with great inconvenience and hazard. In hot weather, the nitroglycerin in 'dvnamite is likely to exude from the absorbent, which makes it exceedingly dangerous to handle or transport. If not properly made and thoroughly neutralized, which is very likely to lee-the case because of ignorant or careless employees, decomposition is likely to set in, which has frequently been the cause of most frightful accidents. Dyna mite is also liable to be detonated by a sad den jolt or shock, and as a result serious accidents often happen with the best grades of dynamite, apparently without cause or explanation. All of these objectionable features are intensified as the per cents. of strength of dynamite are increased, so that when it is made to contain a large amount of nitroglycerin, reaching as high as seventyfive or eighty per cent. or more, it exudes Specification of Letters Patent.

Patented May 2, mil.

Application filed June (i, 1907. Serial No. 377,489.

more readily, is more sensitive, and is much more powerful in its destructive energy.

It is the object of our invention to furnish "an improved explosive equaling in strength the higher per cents. of dynamite, which will at the same time be safe to handle and transport, and which will not freeze or exude, or spontaneously detonate.

Aside from the risks and liabilities in handling and in using dynamite, it is objectionable for many kinds of work, as, for example, coal mining, as it is too violent and is found to shatter too much of the coal; also in close mining or tunnel work the air becomes speedily impregnated with offensive and poisonous gases from the explosive materials, making it impossible or dangerous at't-imes for men to work. It is also found that the shocks from such explosives are so severe that they stir up all the latent gases in the mines, and also cause secondary explosions of a serious nature; and a farther object of the invention is to produce an improved form of explosive equaling in strength the higher per cents. of dynamite, but in which these objectionable features last mentioned are reduced to the minimum. To accomplish. this purpose'a combination of three ingredients, which have heretofore been used to some extent. in certain combina tions in the production of explosive compounds, is used. These ingredients consist of nitrate of ammonia, chlorate of potassium, and mirbane oil. To these'ingredients a certain amount of any suitable cellulose fiber as wood meal preferably made from white pine is added in order to lighten up themass and aid in the rapid transmission of heat Making a total of 100 per cent.

This formula gives a strength of about sixty per cent. dynamite, the quantities of each being equal. The nitrate of ammonia has great explosive force because of its capacity for rapid and extensive production of gas, while the combination of chlorate of potassium and mirbane oil is capable of great explosive force because easily susceptible of detonation. The mirbane oil or the pasty condition of the explosive due to its use serves as a protection to the nitrate of ammonia, Which rapidly deteriorates when exposed to .the atmosphere. precaution, however, it is preferred to pack this explosive, when prepared and ready for use, in hermeticallysealed cases. The Wood meal is added to lighten the mixture, to furnish necessary carbon and to quicken the flame by aiding in its rapid distribution. Wood meal prepared from White pine is preferred. The solids, consisting of the nitrate of ammonia, chlorate of potassium and Wood meal, after being pulverized, are thrown together in a mixer in approximately the proportions above designated, then the ten per cent. of nitro-benzene is poured over the mass, and all are thoroughly Worked into one substance, after which the explosive is packed in cartridges, ready for use. When used it is fired by means of a primer as in the use of dynamite.

We claim:

' 1. An explosive compound consisting of a As a further mixture of nitrate of ammonia, chlorate of potassium, mirbane oil, and Wood meal.

2. An explosive compound containing the following ingredients in substantially the proportions indicated, nitrate of ammonia fifty per cent, chlorate of potassiumthirty per cent, mirbaneoil ten per cent, and Wood meal ten per cent.

8. An explosive compound consistin of nitrate of ammonia, chlorate of potassium, finely divided cellulose, and mirbane oil all in a thoroughly intermixed mass.

4:. An explosive compound consisting of nitrate of ammonia, potassium chlorate,

finely divided cellulose, all intermixed With mirbane oil. to render the mass plastic.

In testimony whereof We have signed our names to this specification, 1n the presence of subscribing Witnesses, on this 3d day of JuneA D. 1907.

' GERSHOM MOORE PETERS. MILTON FLETCHER LINDSLEY.

I Witnesses: I

ELDON R. JAMES, A. W. BEEKLEY, ED FROHLIGER.