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Publication numberUS1074263 A
Publication typeGrant
Publication dateSep 30, 1913
Filing dateJan 13, 1912
Priority dateJan 13, 1912
Publication numberUS 1074263 A, US 1074263A, US-A-1074263, US1074263 A, US1074263A
InventorsGotthold Issler
Original AssigneeE I Du Pont Nemours Powder Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method of densifying fusible explosive nitro bodies.
US 1074263 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



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Paten Application sind January 13, ll, Serial No. 671,096.

itrolodies, of Which the following is al if'ull, clear and exact descri tion reference` being had to the acccmpanyingg1 drawings,

`which :term a partv of this specification.

The general method used for densiying explosive nitro bodies which consists in `,.3ressin; by mechanical means the powdered material in special presses is very inconv ient and expensive. For this reason a number of other methods have been if densifying of nitro bodies less expensive and at simplifying lt is especially important to density nitro bodies which are to be used for charges of projectiles, mines and torpedoes, because, with a higher density, the eiliciency is greater and a denser nitro body is less sensitive against outside inlucnces and inl'iuences during the shot.

Most of charges for projectiles are casiL in paste-board shells or paste board boxes which are sealed Water-tight, and the paste-board boxes must be entirely filled by the nitro body so as to prevent the formation oi' dust or allowing tl e 4charge to move in the box duringl the shot. Some organic nitro bodies possess the property of contracting during tlux chilling, thus producing an interstice between the charge and the paste-board box, which for reasons of safety must be eliminated.

l have discovered a method which produces, in a most simple manner, as high a density as possible of organic nitrobodies used for charges of projectiles, etc., and' which effects a tight bearing of these charges against the Walls of' the paste-board boX.

I have discovered that if the upper part oi the lost head c. that part of the nitro body above the box when the process is iiiiished and which is removed) be maintained liquid, While by means ofv a piston or other compressive force, pressure is transmitted kthrough the liquid layer -to the charge, the highest density oi' the nitro body will be produced, the same will entirely ll the box and empty spaces in the cast Will be avoided.

oposed, all of which at rendering the.

l will nou'Y describe an apparatus for er" rying out my method, Wh A shown in the accompanying ar" shows a front elevation, part' i( of such apparatus.

A paste-board box'o is located. in a mold 5, the latter being somewhat higher than the paste-board box.

c is an iron pipe which rests on the top o' the box a and is closeiy surrounded at this lower portion by the mold o'. @n the upper e border of the pipe crests a circular metal plate e' upon which a top piece l is Welded. An annular Washer hlt'or the purpose of dering the joint tight is inserted between tb. top ofthe pipe c d i e metal circular plate e. This top piece@V rms a jacleted hollow cylinder which4 can be heated l "i means of steam or by means opt another l generator, and the cylinder is for this p -A pose, provided with a steam ,inlet-z' and steam outlet 'l'. The mold l; and the inten mediate piece c are by means of the bolts. fastened bet-Ween the bottom plate m and t" e metal circular platee insucli manner that the Whole apparatus canbe rendered tight. On the plate c, on opposite sides of the top piece cl, are posts ln, connected, above the top-piece, by the cross-platen. ln the topi' piece ZV is a piston g. The piston rod gf e:-

tends up through the. cross-plate n", its f a pressure can be brought to bear upon the upper partof the nitro body which maintained liquid.

The operation of the apparatus is very simple. rl`he paste-board box a is placed in the mold b, the pipe c, plate c and top piece d are placed in position and rendered tight and then the liquid nitro body is introduced. AConnection is then made with the steam lino. the heat is turned on, and the piston 5/ is screwed down, in which operation the lnitro body itself Serves as lubricant. The introduction of the liquid-is effected by removing the cover d of the top piece (Z and, by means of the hand wheel fr, raising` the piston g until it is Withdrawn from the interior.' of m *on niec. The pressure, of course. cfm


be brought about in any other desired manner, for instance, by means of a weight or by eon'qn'essed air. It has been found to be of advantage to cool the mold about to the upper border of the pastc-board box. After the operation the upper part of the lost head that has been maintained liquidy is ivithdrawn through the pipe 0. YT his method actually effects the high density (1.60 to 1.02) and an entire filling of the paste-board box with the nitro body. Empty spaces in the cast are impossible since the liquid nitro'body under pressure fills any'such spaees.

,I do not claim herein the apparatus herein described, as the same forms the subjectmatter of a separate application filed by me of even date herewith, Serial No. 671,097.

Having now fully described my invention, what I claim and desire to protect by Letters Patent is: Y

l. The method for densifying fusible eX- plosive nitro bodies, Vwhich consists in casty ing the main body with an integral part .projecting beyond the same tol form the lost` head and maintaining in a liquid state the part of the lost head more remote from the main body While applying pressure through the liquid layer to the charge.

2. The method for densilying fusible explosive nitro bodies cast in containers Which consists in cliargingthe container and allowing),- an integral part of the nitro body to project above the container to form the lost head and maintaining the upper part of the lost head liquid While applying pressure through the liquid layer Ytothe charge.

3. The methodfor densifying fusible e5;- plosive nitro bodies which consists .in applying heat to'and thereby maintaining fused or liquid one end of the charge, and applying pressure tothe charge through the medium of the part maintained liquid While Y.

gradually chillingl the part of the charge morel remote from the part maintained liquid.

ln testimony of which invention, l have hereunto set my hand, at Cologne7 Germany, on this 15th day of December, 1911.


litnesses: i


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2425418 *Apr 18, 1942Aug 12, 1947Remington Arms Co IncAmmunition
US2435610 *Apr 30, 1941Feb 10, 1948Schneider Charles FFunnel for casting explosive charges
US4079787 *Apr 1, 1977Mar 21, 1978Angel Gallach PratRotor shaft drive mechanism for rotary cultivators
US4098189 *Sep 28, 1976Jul 4, 1978Harry HolmMethod and apparatus for preparing an explosive charge
U.S. Classification86/20.12
Cooperative ClassificationF42B33/0207