US579786A - Max bielefeldt - Google Patents

Description

UNITED STATES PATE T, OFFICE.

BLASTlNG-FUSE.

SPECIFICATION forming part of Letters Application filed April 29, 1896.

Patent No. 579,786, dated March so, 1897. statue. 589,566. (No model.)

To all whom it may concern:

Be it known that 1, MAX BIELEFELDT, doctor of philosophy, a subject of the German Emperor, residing at Wittenberg, in the King dom of Prussia and German Empire, have invented certain new and useful Improvements in Fuses Propagating the Inflammation without the Appearingof aFlamc and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

I A principal drawback to fuses or matchcords as at present employed consists in that they burn witha flame, whereby fire-damp is liable" to be exploded.

As additions of materials to thefuses for" the purpose of reducing the intensity of the flame afiord no guaranty for the safety against such ignition, quick-burning fuses have reeently been prepared which consist of a fusethread contained within igniting-materials. These fuse-threads contain unprepared textile fibers-for instance, cotton, jute, &e.-which are dusted over with readily-burning solid substances and pulverized substances, such as ground tin ier, lycopodium seeds, resins, coinbustible salts, and oxygen carriers. These fuses, however, do not afford perfect security for a safe transmission of the combustion. On the other hand, perfectly safe fuses or matelfcords are obtained according to the present invention by taking threads or cords seed-oil,or the like.

consisting of ordinary fibers that have not been chemically altered or consisting of nitrated fibers and impregnating the same with an oil and then adding salts or compounds which produce a diminution of the flame or which entirely prevent its formation. It is necessary for the security of such fuses to employ a drying-oil, such as linseed-oil, poppy- A further necessary conditionis that if it be desired to completely prevent the production of flame it is necessary to add to this mixture salts or substances that are capable of preventing the formation of a flame. Suitable salts for this purpose are those whichhave a large proportion of water f crystallization, such .as sulfate of magnesia, crystallized soda, alum, boratcs, ammonia salts, and sulfate of ammonia.

The fuse -threads prepared as above describedcan be manufactured .into fuses either by embedding the same in a combustible coming them around with a covering of jute or the like, so that a fuse of the kind known as the Biekford' fuse is. produced.

' For the production of the fuse it is not necessary to employ the said thread as such in used in the same way as gunpowder for the manufacture of the fuses. The thread of the fuse can also be produced by preparing a mixture of nitrated and non nitrated cellulose in the manner above'described. v For increasing the seeurityofiignitignmle 'stillpreven'ting the production of a flame the addition of diazo compounds of thebenzol series and the naphthalene series has proved advantageous.

pounds, have proved suitable. For suppressing flame in fuses or preventing the production thereof it has proved advantageous to add to the above substances glue or substances containing albumen or similar bodies. The glue and albumen substances can either be used together or separately andeither in a solid or liquid condition. I

The kind of albuminous bodies and the form sequently also renders the fuse Waterproof.

The above-named substances can either be prepared separately or together for -the for-' mation of fuses.

eertained the nature of this invention and in,- what manner the :sameis to be declare .that what I'claim is-. I

1; An improved manufacture of fuses and match-cords which consists'in iinprgnati-ng pound, such as gunpowdenor by merely windand then treating the same with oils and salts- Having now particularly described stats-j the fuse, asnitrated cellulose granules can be In particular diazobenzolsulfonic acid, as also its salts, the chromium and bromin comin which they are applied are immaterial. The i it is rendered impervious to moisture and con- 1 a r l performed, I.

s sumac a fiber with a drying-oil and a salt having high percentage of water of crystallization with diazo compounds and with-albuminous bodies.

2. An improved manufactureof fuses and match-cords which consists in impregnating a fiber suchtas guncotton, with a drying-oil and a 'salt having high percentage of water of crystallization with diazo compounds and a fiber, consisting of granulated guncotten,

with a drying-oil and a salt having high percentage of water of crystallization, with diazo compounds of the bensol series and with albuminous bodies.

'5; An improved manufacture of fuses and match-cords, which consists in impregnating a fiber, consisting of granulated gnncottou',

-witl1-a drying-oil and. a salt having a high percentage of water of crystallization, with diazo compounds of the benzol and naphthalene series and with albuminous bodies.

, 6. -Afuse composed of readily-burning material impregnated with a dryingoil, such as linseed-oil, and treated with a substance operating to suppress flame,,snch as sulfate of magnesia, substantially as set forth.

In testimony whereof I have afiixed mysignatur'e'in presence of two witnesses MAX BIEL'EFELD'I,

Witnesses:

JOHN B. Jncicsos MAX WAGNER.