Blank cartridge for training purposes

• US 3,882,778 A
• Filed: 03/21/1973
• Issued: 05/13/1975
• Est. Priority Date: 03/23/1972
• Status: Expired due to Term

• Current Assignee: Heinz Gawlick, Rudolf Stahlmann
• Original Assignee: Heinz Gawlick, Rudolf Stahlmann
• Inventors: Gawlick, Heinz, Stahlmann, Rudolf
• Primary Examiner(s): Stahl, Robert F.
• Application Number:
  US05/343,186
• Time in Patent Office: 783 Days
• Field of Search: 102/43P,41,39,92.7
• US Class Current: 102/530
• CPC Class Codes: F42B 8/04 Blank cartridges, i.e. primed cartridges without projectile but containing an explosive or combustible powder charge

Abstract

A blank cartridge for training purposes in the form of an elongated case made of thermoplastic synthetic resin and forming a hollow simulated projectile and a powder chamber. The case is provided with weakening lines for providing a predetermined rupturing of the case in the form of external longitudinal grooves or slots extending from the tip of the simulated projectile over substantially the entire length of the projectile. The powder chamber is provided with a powder charge mass of at least 10 g. and internal longitudinal grooves may also be provided.

Claims

1. BLANK CARTRIDGE FOR TRAINING PURPOSES COMPRISING AN CLONGATED CASE OF THERMOPLASTIC SYNTHETIC RESIN, SAID CASE FORMING AND ELONGATED HALLOW SIMULATED PROJECTILE AND A POWDER CHAMBER LONGITUDINAL EXTENDING RUPTURING MEANS PROVIDED IN THE WALL OF SAID CASE AND EXTENDING FROM THE TIP OF SAID SIMULATED PROJECTILE OVER AT LEAST SUBSTANTIALLY THE ENTIRE LENGTH OF SAID SIMULATED PROJECTILE, SAID RUPTURING MEANS BEING RUPTURABLE ALONG THE LENGTH THEREOF IN RESPONSE TO A PREDETERMINED INTERNAL GAS PRESSURE, AND LONGITUDINAL EXTENDING WEAKENING MEANS PROVIDED IN THE WALL OF SAID CASE FOR ENHANCING THE DEFORMABILITY OF SAID CASE, SAID WEAKENING MEANS BEING CONSTRUCTED SO THAT THE WALL PORTION PROVIDED WITH SAID WEAKENING MEANS REMAINS INTACT AT THE PREDETERMINED GAS PRESSURE.

2. Blank cartridge according to claim 1, wherein said rupturing means includes a plurality of spaced external longitudinal rupturing grooves in the external wall of said case.

3. Blank cartridge according to claim 2, further comprising a powder charge mass of at least 10 g. provided in said powder chamber.

4. Blank cartridge according to claim 3, wherein said case includes a case shoulder portion, a case neck portion and a case shank portion, said case shoulder portion and case neck portion being arranged between said case shank portion and said simulated projectile, said external longitudinal grooves extending from said simulated projectile over said case neck portion and into close proximity with said case shoulder portion.

5. Blank cartridge according to claim 4, wherein said weakening means includes a plurality of spaced longitudinal extending weakening grooves in the internal wall of said case and extending at least substantially over the entire length of said simulated projectile.

6. Blank cartridge according to claim 4, wherein said weakening means includes a plurality of spaced longitudinally extending weakening grooves in the internal wall of said case extending at least substantially over the entire length of said simulated projectile and over said case neck portion into close proximity with said case shoulder portion.

7. Blank cartridge according to claim 6, wherein said internal longitudinal weakening grooves extend past the case neck portion into the region of said case shoulder portion.

8. Blank cartridge according to claim 7, wherein said internal longitudinal weakening grooves are disposed between adjacent external longitudinal rupturing grooves about the wall of said casing such that said external and internal longitudinal grooves are arranged in alternating succession about the wall of said casing.

9. Blank cartridge according to claim 4, wheRein said external longitudinal rupturing grooves are provided with two longitudinal edge portions terminating in a base portion, said base portion forming a web extending between said two longitudinal edge portions, and a longitudinal extending notch being provided in said web portion adjacent one of said two longitudinal edge portions of said grooves.

10. Blank cartridge according to claim 9, wherein said weakening means includes a plurality of spaced longitudinal extending weakening grooves provided in the internal wall of said case extending at least substantially over the entire length of said simulated projectile.

11. Blank cartridge according to claim 2, wherein said case includes a case shoulder portion, a case neck portion and a case shank portion, said case shoulder portion and case neck portion being arranged between said case shank portion and said simulated projectile, said external longitudinal rupturing grooves extending from said simulated projectile over said case neck portion and into close proximity with said case shoulder portion.

12. Blank cartridge according to claim 11, wherein said weakening means includes a plurality of spaced longitudinally extending weakening grooves in the internal wall of said case extending at least substantially over the entire length of said simulated projectile and over said case neck portion into close proximity with said case shoulder portion.

13. Blank cartridge according to claim 12, wherein said internal longitudinal weakening grooves extend past the case neck portion into the region of said case shoulder portion.

14. Blank cartridge according to claim 2, wherein said weakening means includes a plurality of spaced longitudinal extending weakening grooves in the internal wall of said case and extending at least substantially over the entire length of said simulated projectile.

15. Blank cartridge according to claim 14, wherein said internal longitudinal weakening grooves are disposed between adjacent external longitudinal rupturing grooves about the wall of said casing such that said external and internal longitudinal grooves are arranged in alternating succession about the wall of said casing.

16. Blank cartridge according to claim 14, wherein the total width of said external and internal longitudinal grooves is approximately 5-60% of the length of the outer circumference of said simulated projectile.

17. Blank cartridge according to claim 2, wherein said external longitudinal rupturing grooves are provided with two longitudinal edge portions terminating in a base portion, said base portion forming a web extending between said two longitudinal edge portions, and a longitudinal extending notch being provided in said web portion adjacent one of said two longitudinal edge portions of said grooves.

18. Blank cartridge according to claim 2, wherein said plurality of spaced external longitudinal grooves is between 6 and 12 longitudinal grooves.

19. Blank cartridge according to claim 2, wherein the total width of the external longitudinal grooves is approximately 5-60% of the length of the outer circumference of said simulated projectile.

20. Blank cartridge according to claim 2, wherein said external longitudinal grooves terminate in a base, said base forming a web portion in the wall of the case, said web portion having a case wall thickness of about 0.3-0.6 mm.

21. Blank cartridge according to claim 1, further comprising an elongated casing portion closed at a front end thereof and disposed within said case to form a powder chamber for receiving a powder charge, said rupturing means being in the form of a plurality of spaced longitudinal slots.

22. Blank cartridge according to claim 21, further comprising a powder charge mass of at least 10 g. provided in said powder chamber.

23. Blank cartridge according to claim 1, wherein the wall of said case forming said simulated projectile is provided with portions of increased Wall thickness disposed between the longitudinal extending rupturing means.

24. Blank cartridge according to claim 1, wherein said rupturing means includes in the external wall of said case a plurality of spaced external longitudinal rupturing grooves of one depth and said weakening means includes in the external wall of said case a plurality of spaced external weakening grooves of another depth.

25. Blank cartridge according to claim 24, wherein said plurality of spaced external longitudinal grooves is between 6 and 12 longitudinal grooves.

26. Blank cartridge according to claim 24, wherein said external weakening grooves extend from the tip of said simulated projectile over at least substantially the entire length thereof.

27. Blank cartridge according to claim 1, wherein said weakening means includes a plurality of spaced longitudinal extending weakening grooves provided in the internal wall of said case extending at least substantially over the entire length of said simulated projectile.