Industrial cartridge with separated deflagrating components

• US 4,593,622 A
• Filed: 09/19/1984
• Issued: 06/10/1986
• Est. Priority Date: 09/23/1983
• Status: Expired due to Fees

• Current Assignee: Dynamit Nobel AG
• Original Assignee: Dynamit Nobel AG
• Inventors: Fibranz, Joachim
• Primary Examiner(s): Nelson, Peter A.
• Application Number:
  US06/652,010
• Time in Patent Office: 629 Days
• Field of Search: 102/282, 102/315, 102/331, 102/441, 102/464, 102/465, 102/516, 102/517, 102/530
• US Class Current: 102/530
• CPC Class Codes: F42B 3/00 Blasting cartridges, i.e. case and explosive fuse cords, e.g. detonating fuse cords C06C5/00; chemical aspects of detonators, blasting caps or primers C06C7/00

Abstract

An industrial cartridge has a case that contains a propellant charge of at least two successively arranged propellant charge powders deflagrating at differing speeds. The powders are separated from each other by a gas-permeable cover extending transversely to the case axis. The case of the cartridge contains a compressible seal at the opposite end to the base end of the case. An ignition-transmitting tube is axially arranged in the case. The tube includes, at the level of the second and/or last propellant charge powder as seen from the base, a cover which is thinner than the wall of the ignition-transmitting tube.

Claims

1. An industrial cartridge comprising a case containing a propellant charge, a base in one end of the case, and an ignition-transmitting tube arranged axially in the case, said tube being positioned on the base with an igniter arranged therein;

said propellant charge being composed of at least two successively arranged propellant charge powders deflagrating at differing speeds, the powders being separated by a gas-permeable cover extending transversely to the case axis;

the ignition-transmitting tube being provided with a cover at the level of the propellant charge powder which is the second and/or last charge powder as seen from the base, the cover being thinner than the wall of the ignition-transmitting tube; and

the case containing, at the other end opposite to the base, a seal of a compressible material.

2. An industrial cartridge according to claim 1, wherein the case contains, in succession, two propellant charge powders;

the first propellant charge powder, located at the level of the cover of the ignition-transmitting tube, deflagrating more rapidly than the second propellant charge powder arranged after the first propellant charge powder.

3. An industrial cartridge according to claim 1, wherein the propellant charge powders exhibit differing grain sizes.

4. An industrial cartridge according to claim 2, wherein the propellant charge powders exhibit differing grain sizes.

5. An industrial cartridge according to claim 1, wherein the cover of the ignition-transmitting tube consists of a thin sheet having a thickness of about 0.2 mm.

6. An industrial cartridge according to claim 2, wherein the cover of the ignition-transmitting tube consists of a thin sheet having a thickness of about 0.2 mm.

7. An industrial cartridge according to claim 3, wherein the cover of the ignition-transmitting tube consists of a thin sheet having a thickness of about 0.2 mm.

8. An industrial cartridge according to claim 1, wherein the seal of the case is compressible to 25-30% of its original volume.

9. An industrial cartridge according to claim 2, wherein the seal of the case is compressible to 25-30% of its original volume.

10. An industrial cartridge according to claim 3, wherein the seal of the case is compressible to 25-30% of its original volume.

11. An industrial cartridge according to claim 5, wherein the seal of the case is compressible to 25-30% of its original volume.