US1135772A - Contour-cap for projectiles. - Google Patents

Description

C. DAVIS.

CONTOUR CAP FOR PROJECTILES.

APPLICATION Fl 0 a 191 N. 5. 1,135,772. Patented Apr. 13, 1915.

UNITED STATES PATENT OFFICE.

GLELAND DAVIS, 01? THE UNITED STATES NAVY, ASSIGNOR TO ORDNANCE DEVEL- OPMENT COMPANY OF AMERICA, OF WILMINGTON. DELAWARE,

OF DELAWARE.

A CORPORATION GONTOIiR-CAP non PROJECTILES.

Specification of Letters Patent.

Patented Apr. 13, 1915.

Application filed January 18, 1915. Serial No. 2,982.

To all whom it may rum-rm lie it known that I, CLELAND 1)A\'1S, commander, United States Navy, a citizen of the United States, stationed at San Diego, in the county of San Diego and State of California, have invented certain new and useful Improvements in Contour-Gaps for Projectiles; and 1 do hereby declare the following to be a full, clear, and exact description of the invention. such as will enable others skilled in the art to which it appertains to make and use the same. My present invention relates to improve ments in contour caps for projectiles. and it is intended to provide a hood of such a character as to give the form or contour to the nose of the shell that is best adapted to a minimum resistance of the projectile in its flight through the air, thus causing it to have a greater range, a flatter trajectory, a greater danger space, and a greater linal velocity.

'The advantages of the long pointed shell have long been recognized by ordnance engineers and the principle has been applied to small arms, bullets, and to armor piercing shell, as described in my Patent No.

945,492. granted January 4. 1912, and en titled Contour cap for projectiles: but cer tain requirements of design have limited its application in non-armor piercing projectiles. These 'limitations are due to the fact that when the point is drawn out to a com paratively long radius of ogival, the balance of the shell is disturbed with the result that it wobbles in flight, and hence is not accurate. By lengthening the point, too, the weight is increased, which reduces the ballistic efficiency of the gun, there being a definite weight of shell for each caliber of gun which may not be increased without reducing the muzzle velocity or increasing the powder pressure in the bore. By lengthening the point of the shell. also, its capacity for carrying a bursting charge, a most important desideratum in the design of shell, is decreased. ,All of these consideratimis have limited the designers of shell in the application of the long pointed principle.

W'hat l I OPOSB to prov de. a hood of material of r specific gravity, such as soft rubber, wii ch may be vulcanized to, or otherwise connected to the forward portion of the projectile. In order to give sufficient rigidity to this hood during flight, and also may be applied if desired.

to protect it against injury incidental to the shock of discharge, or against being detormed in the ordinary handling, this hood may be, on all but the small size of proectiles. wrapped with cord, or steel wire, or tape.

My invention will be understood by reference to the accompanying drawings, in which Figure 1 shows a projectile fitted with an improved rubber hood. wound with metal tape; Fig. 2 shows a similar hood with the metal tape omitted; and Fig. 3 shows the hood applied to the nose of an ordinary rifle bullet. Figs. 2 and 3 are shown partly in section and'partly in elevation; and in Fig. 1 parts are broken away.

In Figs. 1 and A represents the body of the projectile which is provided with any suitable nose A. preferably of the ordinary ogival form. and onto this the soft rubber cap B is attached in any convenient way, as by vulcan zing the rubber to the nose of the projectile. as indicated at 7) in Fig. 2. Outside of this rubber cap a winding or wire tape, or cord, such as 0, shown in Fig. 1, Instead of this reinforcing winding, the rubber cap may have its exterior vulcanized or hardened to a sullicient depth to maintain the requisite rigidity of the shape of said cap.

In the form of device shown in Fig. 3, an ordinary metal bullet D is provided. with a suitable nose l) to which is vulcanized as at I), the rubber cap B, which cap is of such shape as" to give the proper contour to the surface of the projectile opposed to the resistance of the air. The exterior of this rubber cap may be vulcanized to give stiffness to same, if desired. W'hile I prefer to vulcani'ze the rubber direct to the metal nose of the projectile. it may be attached thereto in any other convenient way.

Having thus described my invention what I claim and desire to secure by Letters Patent of the United States is l. A contour cap for projectiles, compris ing a solid yielding rubber cap secured to the nose of the projectile, substantially as described.

2. A contour cap for projectiles. rompris ing a solid yieldingrubber cap vul'anized to the noseof the projectile. substantially as described.

.\ contour cap for projectiles. compriscopies of this patent may be obtained for five ing a rubber cap secured to the nose of the projectile, and provided with a reinforcing winding thereon, substantially as described. 4. A'contour cap for projectiles, compris ing a rubber cap vulcanized to the nose of the projectile, and provided with a reinforcing winding thereon, substantially as described. 5. A contour cap for projectiles, con1prising a rutber cap secured to the nose of the projectile, and provided With a metallic winding on the exterior thereof, substantially as described.

cents each, by address! 6. A contour cap for projectiles, comprising a rubber cap vulcanized to th the projectile, and provided with a metallic winding on the exterior thereof, substantially asdescribed.

In testimony whereof, I affix my signature,

m presence of two Witnesses.

CLELAND DAVIS.

\Vitnesses Gnonon P. PITKIN, P. K. CooNs.

g the "Commissioner of Patents,

Washington, D. C."

e nose of 15

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