PRACTICE CARTRIDGE FOR AUTOMATIC FIREARMS

• US 3,570,406 A
• Filed: 05/31/1968
• Issued: 03/16/1971
• Est. Priority Date: 05/31/1967
• Status: Expired due to Term

• Current Assignee: Hubert Frey, Kaseler Hans-Joachim
• Original Assignee: Hubert Frey, Kaseler Hans-Joachim
• Inventors: Frey, Hubert, KASELER HANS-JOACHIM
• Application Number:
  US04/733,362
• Time in Patent Office: 1,019 Days
• US Class Current: 102/529
• CPC Class Codes: F42B 8/16 containing an inert filler in powder or granular form

Abstract

The projectile of the practice cartridge for automatic firearms consists of a synthetic jacket with a loose bulk granular filling, wherein the jacket will disintegrate upon exiting from the firearm barrel after firing to release the granules, which will be nondestructable during firing. Each granule consists of a heavy metal powder held together by a synthetic binder in the range of about 20 to 45 percent by weight. Each granule is disclike or lenticular in configuration.

Claims

1. A practice cartridge for automatic firearms or the like having a projectile receivable in a cartridge case and consisting of a projectile jacket and a projectile charge, wherein the projectile jacket and projectile charge disintegrate after firing, the improvement comprising the projectile charge having a plurality of loose bulk granules, each of the granules consisting of relatively heavy material essentially comprising metallic powder and binder material means holding said relatively heavy material into the granule form so as to be nondestructable upon firing.

2. The cartridge according to claim 1, wherein each of the grains is a homogenous mixture of the relatively heavy metallic powder at the interior and the binder material means essentially comprising synthetic organic material.

3. The cartridge according to claim 2, wherein the proportion by weight of said binder material means is in the range of 20 to 45 percent of substantially each granule.

4. The cartridge according to claim 3, wherein each of said granules has an effective profile cross-sectional area substantially larger as viewed in one plane than as viewed in another plane at right angles thereto.

5. The cartridge according to claim 4, wherein each of said granules is disc shaped.

6. The cartridge according to claim 4, wherein each of said granules is lenticular in configuration.

7. The cartridge according to claim 4, wherein said one plane profile cross-sectional area is at least twice as large as said another profile cross-sectional area.

8. The cartridge according to claim 1, wherein said jacket consists essentially of a synthetic organic material.

9. The cartridge according to claim 1, wherein the proportion by weight of said binder material means is in the range of 20 to 45 percent of substantially each granule.

10. The cartridge according to claim 1, wherein said projectile consists of said jacket means substantially completely filled with said granules, and each of said granules consists essentially of said relatively heavy material being in powder form bound together with said binder material means.

11. The cartridge according to claim 14, wherein eacH of said granules has an effective profile cross-sectional area substantially larger as viewed in one plane than as viewed in another plane at right angles thereto.