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Publication numberUS1327531 A
Publication typeGrant
Publication dateJan 6, 1920
Filing dateDec 6, 1918
Priority dateDec 6, 1918
Publication numberUS 1327531 A, US 1327531A, US-A-1327531, US1327531 A, US1327531A
InventorsCharles Durham
Original AssigneeCharles Durham
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1327531 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



Patented Jan. 6,1920.


avwwvboz Gian '2 es Durham,

was: 01



. 327,531. Patented Jan. 6,1920.



Specification of Letters Patent.

Application filed December 6, 1918. Serial No. 265,615.

To all whom it may concern: 1

Be it known that I, CHARLES DURHAM, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Projectiles, of which the following is a specification.

This invention relates to improvements in projectiles.

In carrying out the present invention it is my purpose to provide a projectile which, when discharged from the gun or rifle, will penetrate the water as well as the air, and which will not ricochet when striking the water.

It is also my purpose to provide a projectile wherein the body will be-formed with a longitudinally extending bore formed with ribs so arranged as to revolve the projectile in. flight, incident to the action of the fluid through which the projectil is traveling on the ribs, thereby enabling the projectile to maintain a relatively high speed of rotation in order to pierce the object at which the projectile is discharged.

It'is also my purpose to provide a projectile wherein the nose will be formed in such manner as to increase the penetrating or piercing qualities of the projectile and wherein the bore through the body of the projectile will be so formed as to insure the projectile traveling in a straight path when it is traveling through a liquid or gas.- eous substance.

A further object of the invention is the provision of a projectile which will be constructed insuch a manner as to carry a quantity of high explosive, so that when the projectile has reached its destination the explo ive may be ignited to destroy the object.

li ith the above recited objects in view and others of a similar nature the invention consists in the construction, combination and arrangement of parts set forth in and falling within the scope of the appended claims.

In the accompanying drawings Figure 1 is a view in side elevation of a projectile constructed in accordance with my present invention, the same being shown as mounted in a shell carrying the propelling charge for the projectile.

Fig. 2 is a longitudinal sectional view thrpugh the projectile removed from the she I.

Fig. 3 is an end view of the" projectile.

Fig. 4 is a similar view of the other end of the projectile.

Fig. 5 is a perspectiveview of the cap that receives the impact from the explosion of the propelling charge.

Fig. 6 is a similar View of the ring or annulus which closes the outer end of the-explosive carrying chamber formed in the body of the projectile.

Referringnow t0 the drawings in detail, 1 designates the body of my improved projectile. In the present instance the outer surface of the body 1 is shaped after the fashion of the ordinary projectile, while formeddn the body 1 and extending longitudinally therethrough is a bore 2 which opens onto the respective ends of the body. At the forward or nose end of the body 1, the bore 2 increases in diameter gradually from a point a short distance from'the forward extremity to such extremity as at 3 so as to provide a relatively large entrance mouth for the fluid through which the projectile is traveling and effect a compression of such fluid when the same enters the major portion of the bore thereby enabling the projectile to hold to a true course in its flight.

In accordance with the present invention the wall of the bore 2 is formed with longitudinal ribs 4:. In this instance, thes ribs 4 have a helical pitch with respect to the axis Patented Jan. 6, 1920.

of the bore 2 so that the fluid traversing the bore may act upon the ribs to revolve the.

projectile at a relatively high speed.

The forward end of the projectile is formed with a circular row of cutting teeth 5 whichact to assist the projectile in penetrating th object at which the projectile is discharged.

Formed in the body 1 of the projectile behind the head thereof and opening onto the rear end is an annular chamber 6 adapted to contain a charge of high explosive. This chamber 6, in the present instance, is arranged concentrically of the bore 2 and threaded into the rear end of the chamber 6 is an annulus or ring 7 which forms a closure for the explosive chamber. The rear freeing the projectile to the action of the air or other fluid in its flight.

From the foregoing description taken in connection with the accompanying drawing,

it willbe seen that I have provided a projectile which possesses'relatlvely high pene-- trating power and which will not ricochet when discharged into the Water.

While I have herein shown and described one particular form of my invention by way I of illustration, I wish it to be understood that I do not limit or confine myself to the precise details of construction herein described and delineated, as modification and variation may be made within the scope of the claims and without departing from the spirit of my invention.

I claim I 1. .A projectile comprising a bodv formed with a longitudinal bore flared at one end, longitudinally disposed ribs extending from the flared end ofsaid bore and terminating short of the opposite end'defining a shoulder,isaid ribs having a helical pitch, and a cap loosely fitted in said bore and bearing against said shoulder, said cap including a I plate arranged against the bottom of said projectile.

2. A projectile comprising a body formed with a longitudinal bore flared at one end, longitudinally disposed ribs extending from the flared 'end ofthe'bore to a point adjacent the opposite end thereof, said ribs defining a shoulder, a chamber formed in the body of the projectile between the bore andthe outer circumference thereof, and adapted 'to contain a charge of explosive mixture, a

cap loosely. fitted in said bore and bearing against said shoulder, andan annular plate formed on said cap and arranged to engage the lower end of the projectile. v

In testimony whereof Iaifixmy signature.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2941469 *Nov 15, 1955Jun 21, 1960Barnhart George EProjectile construction
US4262597 *Jan 25, 1979Apr 21, 1981The United States Of America As Represented By The Secretary Of The ArmyPre-wrapped two-piece ring airfoil projectile of non-hazardous material
US4384528 *Apr 7, 1980May 24, 1983The United States Of America As Represented By The Secretary Of The NavyDuplex round
US4777883 *Jan 19, 1988Oct 18, 1988Chovich Milija MBullet
US4936218 *Oct 10, 1989Jun 26, 1990Wosenitz William BProjectile
US5688515 *Dec 21, 1994Nov 18, 1997Occidental Chemical CorporationHypochlorite donor/bromide ion donor tablets which are stable in water
US5929370 *Dec 18, 1997Jul 27, 1999Raytheon CompanyAerodynamically stabilized projectile system for use against underwater objects
US7905043Feb 29, 2008Mar 15, 2011Hopkins David KBoresight laser aiming system for firearms
U.S. Classification102/398, 102/399, 102/503
International ClassificationF42B10/34, F42B10/26, F42B10/00
Cooperative ClassificationF42B10/34, F42B10/26
European ClassificationF42B10/34, F42B10/26