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Publication numberUS1089161 A
Publication typeGrant
Publication dateMar 3, 1914
Filing dateDec 10, 1913
Priority dateDec 10, 1913
Publication numberUS 1089161 A, US 1089161A, US-A-1089161, US1089161 A, US1089161A
InventorsAlbert F Shore
Original AssigneeAlbert F Shore
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1089161 A
Abstract  available in
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Description  (OCR text may contain errors)



' I mv N R BY T - ATTORNEY ALBERT r. SHORE, or new roux, N. Y.


Specification of Letters Patent.

Patented Mar. 3, 1914.

' Application filed. December 10, 1913. Serial No, 305,690.

To all whom it may concern:

Be it known that I, ALBERT F. SHORE, a

' citizen-of the United States, residing at New York, in the county of New York'and State of New York, have invented certain new and useful Improvements in Projectiles, of which the'following is a. full, clear, and

, exact specification.

This invention relates to improvements in projectiles of the type used for piercing armor plates, and the object of the. invention is to provide aprojectile of improved which a Figure 1 isa view partly in section of a projectile embodying my invention. Fig. 2 is a similar view, showing a modification, and Fig. 3 is a view illustrating twophases or positions of the projectile in the act of penetrating and crushing an armor plate.

The manufacture of large size modern projectiles for use against armor plate is accompanied by great difliculties because of the failure of the large mass of steel to harden properly. Another objection, is the enormous expense of making the/whole mass of the projectile of alloy steel, when only the point or impact port-ion needs to behardened. As projectiles are now made, the forward end is pointed to'facilitate penetration and to out the air, but since this point is at once crushed against a hard plate,

final penetration and crushingof the plate is effected by the flattened or blunt nose by the process of punching out a plug the full di-. ameter of the shell. The point is, therefore, not the product of the most advantageous design. A cylinde o-f l'c'ss hard material having a. relative blunt nose or impact portion of intensely hard steel will embody a mechanical. principle far more effective to crush the face of the armorplate, and since the body of the shell canbe of comparatively inferior material, the same efiiciency can be obtained at considerable less cost than when the entire projectile ismade of high grade of alloy steel.

My invention is, therefore, embodied in a projectile comprising a body portion provided with a chilled fore end and further provided with an impact member of intensely hard steel and- 'lwhich preferably is in the form of a'ball. "The fore end of the projectile is thereafter furnishedhvith the usual soft cap and a sheet metal point to facilitate cutting of the air;

The detailed construction and arrange ment is illustrated in Fig. 1, in which the reference niuneral 4 denotes the body of the projectile, which is a relatively soft cast ing, in' the usual form. The fore end 5 ofv this cylinder is chilled and hardened and provided with a socket 6'for the reception of a ball 7 of intensely hard steel. A thin layer or lining 8 of soft steel is interposed between the ball and the cylinder to afford better and uniform contact and to eliminate uneven strains at the moment of impact. 9 represents the usual softmetal cap and 10 is the sheet metal point which is shrunk on to the fore end 5.

The modification illustrated in Fig. 2 differsfrom Fig. 1, in that the'chilled fore end 11 is separate from the body 4 and is shrunk on, the body and fore end being provided with cooperating shoulders at 12. At the moment of impact, the metal cap is, of course, shattered and the soft cap 9 is forced back exposing the ball 7 which crushes in the hard face of the armor plate 'at 13, Fig; 3, without itself being damaged by those improper strains to which a sharp solid point would be exposed, as, for. instance, when the projectile-strikes the plate at an angle or obliquely.

At 14, Fig. 3, theplate 15 is shown weakened by the penetration of the ball and the body of the projectile will punch through the usual plug and thus penetration is effected with ballistic mass of comparatively inferior and cheaper metal.

It is obvious, that by using a ball, that is a small body with a large chilling surface, I not only obtain the maximum depth of hardness, but also the maximum fineness of grain, intensity of hardness, :and very. greatstrength, because but little superheat is required in the hardening process. The 'ball acts as" a blunt punch or impact body and penetrates the plate gradually to-crush it without unduly shocking or upsetting the body of the projectile.

The invention being susceptible of changes in the detailed construction", I do not wish to be limited beyond the scope of the appended claims.

I claim:

1. An armor-piercing projectile comprising ii -combination a relatively soft body having a hardened blunt fore end to the full diameter of said body, and provided with a. socket, a hardened, steel ball seated in said socket, said hardened fore end, and a sheet metal pointsecured to thelatter.

2. An armor-piercing projectile comprising in combination a relatively soft body having a hardened blunt fore end provided with a socket, a hardened steel ball seated in said socket, a soft lining in said socket interposed between said hardened fore end a soft cap forward of the and the said steel ball, a soft cap over the latter and a metal point secured to the said hardened fore end.

8. An armor-piercing projectile comprising in combination a relatively soft'body,

a hardened fore end portion shrunk'on to ALBERT F. SHORE. Witnesses:


Copies of this patent may be obtained for five cents each, by addressing" the Commissioner 01' Patents, Washington, D. C.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3213792 *Nov 5, 1963Oct 26, 1965Bofors AbArmor-piercing projectile with hard core
US3370535 *Apr 14, 1960Feb 27, 1968Aviation UkArmor piercing projectile
US4108072 *Dec 27, 1965Aug 22, 1978Deutsch-Franzosisches ForschungsinstitutArmor-piercing projectile having spaced cores
US4677915 *Jun 25, 1984Jul 7, 1987Rheinmetall GmbhArmor-piercing projectile
US4756254 *May 27, 1986Jul 12, 1988Motorola, Inc.Penetrating projectile
US4961382 *Mar 7, 1988Oct 9, 1990Motorola, Inc.Penetrating projectile having a self-destructing piercing front end
DE1194292B *Nov 20, 1963Jun 3, 1965Gunnar Richard Guldbrand GrenaGeschoss
U.S. Classification102/518
Cooperative ClassificationF42B12/06