Wad with ignition chamber
View Patent ↗A wad or basewad for ammunition includes an ignition chamber. The ignition chamber can be integrally formed with the payload wad, basewad, or battery cup or can be attached to the payload wad, basewad, or battery cup. The ignition chamber communicates with a primer of the ammunition to receive and contain the primer blast for at least an initial period of time. This facilitates faster initial ignition of the propellant of the ammunition, and consequently allows higher performance levels to be achieved. Other advantages regarding other applications of this invention include cleaner burning loads, greater economy, and lower perceived recoil.
1. A round of ammunition, comprising:
a primer having a forward end;
a wad disposed opposite to the primer;
an ignition chamber disposed between the primer and the wad, with a proximal end of the ignition chamber aligned with and located adjacent the forward end of the primer configured for receiving a primer blast therein.
2. The round of ammunition of claim 1 , further comprising a first propellant disposed in at least the ignition chamber and a second propellant disposed at least along an exterior of the ignition chamber rearwardly of the wad.
3. The round of ammunition of claim 2 , wherein the first propellant is different from the second propellant.
4. The round of ammunition of claim 1 , wherein the primer is at least partially disposed in a battery cup, and the proximal end of the ignition chamber extends from the battery cup, terminating at a distal end of the ignition chamber adjacent a rearward face of the wad.
5. The round of ammunition of claim 4 , wherein the ignition chamber comprises an ignition tube, and wherein the ignition tube is integrally formed with the battery cup at the proximal end of the ignition chamber.
6. The round of ammunition of claim 1 , further comprising a secondary tube concentric with and exterior to the ignition chamber, the secondary tube defining at least one recess between the ignition chamber and the secondary tube.
7. The round of ammunition of claim 6 , wherein a propellant is disposed in at least the ignition chamber, and the at least one recess between the ignition chamber and the secondary tube.
8. The round of ammunition of claim 6 , wherein the ignition chamber comprises an ignition tube, and wherein the secondary tube and the ignition tube are integrally formed with the wad.
9. The round of ammunition of claim 1 , wherein the ignition chamber comprises an ignition tube defining an ignition recess extending between a distal end of the ignition chamber adjacent the wad and the proximal end of the ignition chamber, the ignition recess having a minimum cross-sectional area at the distal end of the ignition chamber and a maximum cross-sectional area at the proximal end of the ignition chamber.
10. The round of ammunition of claim 9 , wherein the ignition tube comprises an interior surface having a first portion extending from the distal end of the ignition chamber at a first angle, and a second portion extending from the first portion to the proximal end of the ignition chamber at a second angle.
11. The round of ammunition of claim 10 , wherein the first angle is greater than the second angle.
12. The round of ammunition of claim 1 , wherein the ignition chamber is integrally formed with the wad.
13. The round of ammunition of claim 1 and wherein said ignition chamber comprises a tube having a substantially cylindrical, square, rectangular or polygonal cross-sectional configuration.
14. The found of ammunition of claim 1 , wherein the wad comprises a base wad and the ignition chamber further comprises an ignition tube integrally formed with the base wad.
15. An ignition chamber configured for a round of ammunition having a wad
disposed
opposite to a primer, the ignition chamber comprising:
a distal end configured to be disposed adjacent the wad; and
a proximal end configured to be aligned with and disposed adjacent a forward end of the
primer configured for receiving a primer blast therefrom.
16. The ignition chamber of claim 15 , comprising an ignition tube, wherein the ignition tube is integrally formed with a battery cup of the primer located at the proximal end of the ignition chamber, so that the forward end of the primer communicates with the proximal end of the ignition chamber.
17. The ignition chamber of claim 15 , comprising an ignition tube at least partially received in a secondary tube to define at least one recess between the ignition tube and the secondary tube, the secondary tube being generally concentric with the ignition tube.
18. The ignition chamber of claim 17 , wherein the secondary tube at least partially defines an interior surface of an outer chamber, and each of the ignition chamber, the secondary tube, and the outer chamber is adapted to receive a propellant.
19. The ignition chamber of claim 15 , comprising an ignition tube defining an ignition recess extending between the distal end of the ignition chamber and the proximal end of the ignition chamber, wherein the ignition recess comprises a minimum cross-sectional area adjacent the distal end of the ignition chamber and a maximum cross-sectional area adjacent the proximal end of the ignition chamber.
20. The ignition chamber of claim 19 , wherein the ignition tube comprises a curved interior surface, with the ignition recess having a generally parabolic longitudinal cross-section.
21. The ignition chamber of claim 19 , wherein the ignition recess is generally conical.
22. The ignition chamber of claim 19 , wherein the ignition tube comprises an interior surface having a first portion extending from the distal end of the ignition chamber at a first angle, and a second portion extending from the first portion to the proximal end of the ignition chamber at a second angle.
23. The ignition chamber of claim 15 , and wherein said ignition chamber comprises having a substantially cylindrical, square, rectangular or polygonal cross-sectional configuration.
24. The ignition chamber of claim 15 , and wherein the wad comprises a base wad and the ignition chamber further comprises an ignition tube integrally formed with the base wad.