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Publication numberUS424442 A
Publication typeGrant
Publication dateMar 25, 1890
Publication numberUS 424442 A, US 424442A, US-A-424442, US424442 A, US424442A
InventorsM. Wood
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 424442 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)




No. 424,442. 4 Patented Mar. 25, 1890.

Fig. s.

UNITED' Srnrns [PArtsN/tr ritieni f WILLIAM M. woon,v o'r w-Asnme'froiv,-Ds'rRIcr oF c oLUMBImAssIGNoB fro THE TnoMsoNiE cHUsETTs.

otllVashinggton, in the Districtl of Columbia, f

5 have invented acertain new andusefulfr jectile, ot which -the following is a specification.

My invention relates to the construction ofhollow'projectiles, but is especially usefulfor io 'armor-piercing shells used in warfare.

.The object of my invention is to produce a `hollow ,proj ectile which may be cheaply made v and which shall be of high strength and eiiiciency. Heretofore armor-piercing and other hollow projectiles have been made with a cast- Y. met-alrbody and point integral with one an,

other, and in some cases it has been proposed to make a projectile in which the head; body, and base sections are formed,integrall by a' -zo sort of rolling operation. l

proposed to make projectiles with the head and body integral with one another by-forming an ingot of the desired shape and then turning out the charge-chamber. In most forms of projectile the base of rtheprojectile has been closed by a separate plug provided.

1 with a' small fusefhole. In the usnal'con'f structions the open endof thebodyat the Yrear end is closed by a screw-plug provided with a fuse-hole. In theprojectile invented by me the body portion is formed as a single homogeneous hollow piece of metal either separate or integralwith the base-section,-but

preferably as a separate tubular piece open from end to end, and-the point separately formed is welded tothe forward 'enflibff such; '1

tubular or hollow bodyfsection, The tubular" body might be formed'by casting; but ispr'ef* erably a drawn. or swaged piece'fof tubing.`

open from end to end` j My inventionV consists, also, of a hollow projectile the body-section of which consistsof a homogeneous tubular piece of metal, while the head and' base, formed of separately-conf structed pieces, are welded to the opposite ends thereof. This construction of projectile not only permitsof the ready use of diierent grades of metal for the pointand body, but is also capable of cheap and rapid manufacture. By making.;I the body portion of a drawn It has also been.

L Ecrnic vvELnifNegooMPANv, *or ye'osroN, MASSA- starch 25,1890.

"cia-Hy in projctilesfthewalls of whichfare'v Aistence of the inner, and outer skinr 'or fibrous surface produced jin' the processr of drawing. The manufacture-*is lso greatlypfacilifated by making the body 'as tf-tubular sectionopen fromend tov lend; 'which' is joined ait'it'soppo-v site ends respectively to -thelibaseandfpoint My invention consists, .furtherfin `thezprovision; in a hollow lprojectile forarmor-piere#r ing purposes,`of an ir'iternnl r strengthening burr or`projection a y'thel'iie of unionof'the head and body?` Y i j-In the 'accomp ying, drawingsffFigure 1 vshows ineongitudiaizsection. the threef'p'orf tions ofacommon shellv ccnstructedingaccordance with myinventionf- Figishows in 7e` perspective thecoinpletejnanufactiired-shell.; f Fig; 3 shows in 'longitudinal 'section theQthree f parts of an armvor-pierc'ng;I shellsconstructed:

piercing shell such a AindicatedinEig; 3,' andi may be'jconstructed,bydropf rgingg'rollingj* 'g mother usual',

0 I i pret a asectdnfof; f-rjpl e'ridftdwnd.:" .`:v gie gthftotheipt j ectile,` I grcposeto fornir;the,'hollow tubular; body froml tube p or vsection of'tubig cnsisting of drawn tubing, since I am enabled thereby to get the benefit ofthe streligthen- A; 'ing fibrous surface or skinfproduced in' the 9;51'

drawing operation.` `The' tubularsecti'on' might be formed fof'a singlev hom'f )ggeneousk piece ci metal by swaging or real ning out af section of tubing* tothe desired form orjby anyfother method bywhich. thel ,interior cdv. Si oo "ity will be given the proper' shape to provide Walls of proper thickness and proportion. j

.- @Iam awarethat it has been before proposed t'oinake. the body of t-he shell from rings for" fdisks of metal alternately hard and soft, whichl are built up upon one another to form an" elongated tube of the proper length to 4iriake the hollow chargecham'oer of the projectile;

but such construction is not only'dificuitapd expensive to produce, but also. 'requiresfthat the .exterior shall be turned downo'r ,finished 1 i offa manipulation which .is n ot'nec'essaiy" Awhen the body is made "of fa si ngleflloiuoge'` -neouslpiece of metal, such' as drawn-'tuhingi "The` base of Athe shell G may be madeof the".v :same: thickness asV the body` and may be' stamped out or ianged up or otherwise made'.

vthe body the shell Willhave an unbroken duction of the fuse.

.plug. l l i 4In order to strengthen an armor-piercing into' the form shown, so that when'welded toV `outer surface continuing around from the sfide toor near the center ofthe base, at which poi-ntonly it need be pierced for the introln ordinary Yconstructions of projectile it'has been usual to leave 4the base of the' shell, or, rather, the end of the body-section, open and to fill the sameby a .pojectile, I forrn the same with an internal burr or enlargement, as shown at m, Fig. 4.

. This burr or enlargement may be 'produced by the process of Welding the point to 'the body, .as hereinafter described. The several 4parts of the shell formed as describedare stood in the welding art, to complete the union,

electrically welded to one another in any suitable electric Welding apparatus byplacing the parts in their proper position in suitably,- formed clamps with their meeting-ends in abutment and passing a heating-current of electricity through them,`so as to raise the parts'to the welding 'temperature where the.

joint is to be formed. Pressure or other me-A chanical force is then applied, as well under- `and, if desired or if required by the -nature of the material employed, the exterior of the projectile'may be ground off.v When the bodyis made of drawn tubing and the point and base are forged into shape, no finishing isk required after the completion of the union. When the ends of the parts where they ab'ut'are left, square, the pressure used in the welding will produce the internal burr or'y projectionm; If-it be desired to avoid the formation of the internal burr in theordinary shelhthewelding may be done over a vmandrel inserted at the joint and preferably of non -conducting material,- .or the burr may be suppressed by *suitably-"beveling the abutting ends, as well understoodin theart of electric )rel ing. The formation of an external burr may be preventedby beveling the end or ends which l.abut from the vouter surface inward.

D indicates the usual rotating band, which 'is applied at the junction of the body and base sections, and is secured in place by the weldingof the sections together after the application 4of theband to the turned-down por- .'tion of a section, v

'I .do not claim the improvement 'in the methods vor processes of manufacturing projectiles hereinbefore referred to by forming the head separate from-'the' tubular body and then welding thetwo together by electricity; nor vdo I claim the improvement which consists in separately constructing a base-section of the'form-shown and then 'welding it to the body by the electric welding process hereiubefore mentioned, as these form lthe -subjectlof claims in Vmy application for patent of even date herewith, Serial No. 327,507.

What I claim as my invention is- 1. A hollow projectile having its entire body portion formedof a single homogeneous piece jof metal open from end to end and its head and base of separately-formed pieces welded .to the first, as and for the purpose described.

2. A hollow projectile, the entire body portionof which,having a suitable base, consists.

with a separatelyfformed point-section welded t to 'the first, as and for the purpose described.

5. A hollow projectile having its head Welded to its body and provided at the point of union with an internal strengthening burr or projection.


Signed at NewYork, in the county of York and State of New York, this 5th day of November, A.AD. 1889.

` WILLIAM M. VOOD.' Witnesses: .l

' J. ki,'\..-HURDLE,

WM. H. GAinrz.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2678804 *Jan 12, 1950May 18, 1954Schlumberger Well Surv CorpSample taking projectile
US2895418 *Mar 28, 1955Jul 21, 1959Albert Lyon GeorgeBomb head construction
US5305505 *Apr 12, 1993Apr 26, 1994National Forge CompanyProcess of making a multi-section bomb casing
Cooperative ClassificationF42B12/06