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Publication numberUS1181203 A
Publication typeGrant
Publication dateMay 2, 1916
Filing dateJan 4, 1916
Priority dateJan 27, 1914
Publication numberUS 1181203 A, US 1181203A, US-A-1181203, US1181203 A, US1181203A
InventorsLouis Alard
Original AssigneeLouis Alard
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Means for modifying the trajectory of a projectile.
US 1181203 A
Abstract  available in
Images(3)
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Claims  available in
Description  (OCR text may contain errors)

L. ALARD.

MEANS FOR MODIFYING THE TRAJECTORY OF A PROJECTILE.

APPLICATION FILED IAN-4, IsIs.

1, 181 ,203. I Patented May 2, 1916.

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L. ALARD.

MEANS FOR MODIFYING THE TRAJECTORY OF A PROJECTILE.

APPLICATION FILED JAN.4, 1916.

1,181,203. Patented May 2,1916.

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MEANS FOR MODIFYING HE ORY OF A PROJECTILE.

APPLICATIC .4, 1916 1,181,203. I Pa ed May 2,1916.

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LOUIS ALARD, OF PARIS, FRANCE.

MEANS FOR MODIFYING THE TRAJ'ECTORY OF A PROJECTILE.

Original application filed January 27, 1914, Serial No. 814,639.

Serial No. 70,122.

To all whom it may concern Be it known that I, LOUIS ALARD, a citizen of the Republic of France, residing at Paris, France, have invented certain new and useful Improvements in Means for Modifying the Trajectory of a Projectile, of which the following is a specification.

proper of the projectile.

My invention relates to high velocity projectiles adapted to be discharged from guns, and more particularly to means provided on such projectiles, whereby, when the projectile has been discharged from the gun, its trajectory is transformed, the trajectory be ing made more or less equal to that heretofore obtained with a field howitzer only, such as described in my parent application. Ser. No. 814,639. filed January 27, 1914, of which application this is a division.

According to my invention, the means referred to consists in what I have termed a braking device, which is preferably removably attached to the ogival portion, or the fuse-head of the projectile, or between these two parts. or also on the body part The said braking device may either be rigid, or it may be so constructed as to open out or unfold under the action of air pressure and the centrifugal force developed by the rotating movement of the projectile. WVhile the projectile is still in the barrel of the gun. this braking device is of course kept folded, or in a collapsed state so that it will lie flat against the outer face of the projectile.

In the modification of my new device forming the subject matter of this application, an explosive charge is provided in the forward portion of the projectile which charge is ignited by a time-fuse, and the gases given off by said explosive charge cause the braking device to open outward whereby the tra ectory of the projectile is transformed. The explosive, instead of acting directly upon the braking device may be made to act upon a movable member so arranged as to normally hold the braking device in inoperative position. but forced out of its normal position by the explosion of said explosive charge to permit the braking device to act.

In the drawing, Figure 1 illustrates half in side elevation and half in longitudinal section, a projectile provided with my new braking device, showing also the explosive charge in the forward portion of the pro Specification of Letters Patent.

Patented May 2, 1916.

Divided and this application filed January jectile, Fig. 2 is a cross section along line AA in Fig. 1, Fig. 8 a partial half longitudinal section of the projectile in Fig. 1, showing the braking device in unfolded position, Fig. 4 illustrates half in side elevation and half in longitudinal section, amodification, while Fig. 5 illustrates a further modification showing half of a projectile in longitudinal section.

According to Figs. 1 to 3, the braking device, which is secured between the fuse-head f and the ogival portion 0 of the projectile and is adapted to open outward under the action of the explosion of the explosive charge 18, comprises a base piece a and a body portion 6 closely fitting the ogival portion 0 of the projectile. The thickness of the body portion is reduced at intervals along a plurality of lines of rupture by grooves 17. The rupture is produced by the explosion of the said explosive charge 18 provided in the ogival portion,which charge is supposed to be ignited after the lapse of a predetermined period through a passage connecting the said explosive charge with a special time-fuse not shown. Fig. 3 shows the body portion 6 unfolded, due to the combined action of the explosion and the centrifugal force developed by the rapid rotating movement of the projectile.

14 is a washer provided With a plurality of pins 15 extending through holes in the base-piece a into corresponding recesses in the ogival portion.

The arrangement shown in Fig. 4 is similar to the one just described except that in this modification, the body portion 6 forms, at the same time, a retaining means for the free ends of a plurality of strips 0 which are supported by a sleeve d on the body part of the projectile so as to normally lie close against the outer face of the projectile, in which position they are held by the body portion b. When the latter is caused by the explosion to unfold. the free ends of said strips 0 are released and, due to the centrifugal force are caused to assume a posi tion as indicated by the broken lines in Fig.

thus constituting a powerful brake.

In the modification shown in Fig. 5, an unbroken, i. e. a non-grooved cup-shaped member 19 is placed on the ogival portion 0 of the projectile, which member, like the grooved body portion 72 of the braking device in Fig. 4 constitutes a retaining device for the free ends of a plurality of strips 0 like those shown in Fig. 4. In this construction (Fig. 5) the explosive charge 18 is to act upon that portion of the cupshaped member 19 which is engaged between the ogival portion 0 of the projectile and its fuse-head f. The cup-shaped member 19 is designed to move forward on the ogival portion 0, to free the strips 0, which movement is made possible by a space being provided between the fuse-head f and the cupshaped member. said space being slightly greater than the overlap of the member 19 over the strips 0. WVhen the latter have been released, their free ends will, as in Fig. 3, open outwardly.

I claim as my invention:

1. In combination with a high velocity projectile, a normally inoperative braking device mounted on the projectile, an explosive charge so arranged in the projectile as to cause by its explosion the said braking device to assume its operative position so as to curve the trajectory of the projectile, and means for igniting the said explosive charge, after the projectile has left the gun.

2. In combination with a high velocity projectile provided with a fuse-head, a normally inoperative braking device mounted on the projectile between its ogival portion and the said fuse-head and having lines of least resistance, an explosive charge so arranged in the projectile as to rupture by its explosion the lines of least resistance of said braking device, permitting the latter to unfold and exert its braking action thereby curving the trajectory of the projectile, and means for igniting the said explosive charge, after the projectile has left the gun.

3. In combination with a high velocity projectile provided with a fuse-head, a normally inoperative braking device mounted on the projectile between its ogival portion and the said fuse-head and having lines of least resistance, a second braking device mounted on the body part of the projectile. the free forward edge of the said second braking device being normally held in inoperative position by the rear edge of the said first braking device, an explosive charge so arranged in the projectile as to rupture by its explosion the lines of least resistance of said first braking device permitting the latter to unfold, to exert its braking action at the same time releasing the free forward edge of said second brak ing device, the said two braking devices thus acting together to transform the trajectory of the projectile, and means for igniting the said explosive charge after the projectile has left the gun.

4. In combination with a high velocity projectile, a braking device mounted on the projectile, a movable member normally holding said braking device in inoperative position, an explosive charge so arranged in the projectile, as to cause by its explosion the said movable member to release said braking device, permitting it to exert its braking action, and means for igniting said explosive charge. after the projectile has left the gun.

5. In combination with a high velocityv projectile provided with a fuse-head, a braking device mounted on the projectile com prising a plurality of strips adapted to bend outwardly away from the projectile, a movable member mounted between the said fusehead and the ogival portion of the projectile and normally holding the free forward ends of said strips against the outer face of the projectile, an explosive charge so arranged in the projectile as to move by its explosion the said movable member forward toward the said fuse-head, thereby causing it to release the free ends of the said strips. permitting them to unfold and exert a braking action, and means for igniting said explosive charge, after the projectile has left the gun.

In testimony whereof I aifix my signature in presence of two witnesses.

LOUIS ALARD.

Witnesses:

HENRI Moms CHAS. P. PRESSLY'.

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

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2432421 *Jan 8, 1942Dec 9, 1947Homrighous John HDirectional control for bombs
US2520433 *Nov 10, 1941Aug 29, 1950Robinson Marion BDirected missile
US2981183 *Mar 22, 1951Apr 25, 1961Godfrey Theodore BTail initiation with nose fuzes
US3179052 *Jun 21, 1962Apr 20, 1965Hotchkiss BrandtDrag collar for varying the range of rockets
US3304030 *Sep 24, 1965Feb 14, 1967Biggs Jr Lawrence MPyrotechnic-actuated folding fin assembly
US3351303 *Oct 12, 1960Nov 7, 1967Gen Dynamics CorpMissile control system
US4008667 *Dec 13, 1973Feb 22, 1977The L.O.M. CorporationControlled range bullet
US4140061 *Jun 6, 1977Feb 20, 1979The United States Of America As Represented By The Secretary Of The ArmyShort-range discarding-sabot training practice round and self-destruct subprojectile therefor
US4586681 *Jun 27, 1983May 6, 1986General Dynamics Pomona DivisionSupersonic erectable fabric wings
US5003886 *Jul 29, 1987Apr 2, 1991Rheinmetall GmbhProjectile for combatting actively and passively recting armor
US5816531 *Feb 4, 1997Oct 6, 1998The United States Of America As Represented By The Secretary Of The ArmyRange correction module for a spin stabilized projectile
US5826821 *Aug 4, 1997Oct 27, 1998The United States Of America As Represented By The Secretary Of The ArmyDrag control module for range correction of a spin stabil
US6345785 *Nov 7, 2000Feb 12, 2002The United States Of America As Represented By The Secretary Of The ArmyDrag-brake deployment method and apparatus for range error correction of spinning, gun-launched artillery projectiles
US6644587 *Feb 8, 2002Nov 11, 2003Tom KusicSpiralling missile—A
US9702675 *Jan 28, 2013Jul 11, 2017Bae Systems Bofors AbBrake panel for a detonator or a projectile
US20150001335 *Jan 28, 2013Jan 1, 2015Bae Systems Bofors AbBrake panel for a detonator or a projectile
Classifications
U.S. Classification244/3.21, 244/3.28
Cooperative ClassificationF42B10/50
European ClassificationF42B10/50