Non-lethal flash grenade

• US 6,767,108 B1
• Filed: 12/10/2002
• Issued: 07/27/2004
• Est. Priority Date: 12/10/2002
• Status: Expired due to Fees

• Current Assignee: the united states of america as represented by the secretary of the navy
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Ostrowski, Peter P., Sturgill, Phillip R., Blachowski, Thomas J., Culhane, David A.
• Primary Examiner(s): Husar, Stephen
• Assistant Examiner(s): PAYNE, SHARON E
• Application Number:
  US10/318,672
• Time in Patent Office: 595 Days
• Field of Search: 362/11, 362/112, 362/113, 362/110, 362/251, 362/227, 362/15, 362/4, 362/6, 362/13-14, 102/498, 89/11.1, 315/57, 315/56, 315/58, 315/149
• US Class Current: 362/112
• CPC Class Codes: F42B 12/36 for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
• CPC Class Codes: F42B 12/42 of illuminating type, e.g. carrying flares
• CPC Class Codes: F42B 8/12 Projectiles or missiles F42B10/48, F42B12/36, F42B19/36 take precedence

Abstract

A non-lethal flash grenade includes a transparent, generally cylindrical housing; a layer of flash lamps disposed in the housing; an ignition circuit connected to a first centrally located flash lamp in the layer of flash lamps; a battery connected to the ignition circuit; and a variable time delay switch connected to the ignition circuit; whereby the first centrally located flash lamp is activated by the ignition circuit and remaining flash lamps are sympathetically activated by a flash of the first centrally located flash lamp.

Claims

1. A non-lethal flash grenade, comprising:

a transparent, generally cylindrical housing;

a layer of flash lamps disposed in the housing;

an ignition circuit connected to a first centrally located flash lamp in the layer of flash lamps;

a battery connected to the ignition circuit; and

a variable time delay switch connected to the ignition circuit;

whereby the first centrally located flash lamp is activated by the ignition circuit and remaining flash lamps are sympathetically activated by a flash of the first centrally located flash lamp.

2. The device of claim 1 further comprising at least one additional layer of flash lamps disposed in the housing, the at least one additional layer of flash lamps including a second centrally located flash lamp electrically connected to the first centrally located flash lamp;

whereby the second centrally located flash lamp is electrically activated by the first centrally located flash lamp and remaining flash lamps in the at least one additional layer are sympathetically activated by a flash of the second centrally located flash lamp.

3. The device of claim 1 wherein a number of flash lamps is seven.

4. The device of claim 1 wherein the flash lamps comprise zirconium wool and oxygen.

5. The device of claim 2 wherein the flash lamps comprise zirconium wool and oxygen.

6. The device of claim 1 wherein the housing comprises polycarbonate.

7. The device of claim 2 further comprising base plates wherein each layer of flash lamps is mounted on a respective base plate.

8. The device of claim 1 wherein the housing includes top and bottom end plates, the variable time delay switch being disposed adjacent the bottom end plate, the device further comprising an activation switch located on an external surface of the bottom end plate, the activation switch being connected to the variable time delay switch.

9. The device of claim 1 wherein the variable time delay switch includes delay times in a range of about 0.5 seconds to about five minutes.

10. The device of claim 2 wherein a number of layers of flash lamps is three.

11. The device of claim 2 wherein a number of layers of flash lamps is four.

12. The device of claim 2 wherein a number of flash lamps per layer is greater than fifty.

13. The device of claim 2 wherein the device produces an illuminance of about 92,000 foot candles at a distance of about five feet from the device.

14. The device of claim 2 wherein a size of the device is about the same as a conventional twelve ounce soft drink can.