Systems and methods having a power supply in place of a round of ammunition

1. An apparatus for converting a weapon for percussion primed ammunition to an electronic weapon for incapacitating a human or animal target, the weapon having a mechanism for initiating propulsion away from the weapon of a projectile of a round, the apparatus for use with a cartridge, the apparatus comprising:

a tube;

a power supply supported by the tube; and

a switch supported by the tube and located by the tube to be operated by the mechanism of the weapon; wherein

the tube has a form that allows the tube, the power supply, and the switch as a unit to replace the round when the round is removed from the weapon;

when the apparatus is replacing the round, the apparatus is not propelled as a projectile from the weapon in response to operation of the mechanism of the weapon; and

an operation of the switch enables the power supply to supply power to the cartridge for delivering an incapacitating electrical charge to the target.

2. The apparatus of claim 1 wherein the switch enables the power supply in response to being struck by a firing pin of the mechanism.

3. The apparatus of claim 1 wherein the power supply comprises a battery.

4. The apparatus of claim 1 further comprising an interface between the power supply and the cartridge, the interface providing mechanical coupling between the apparatus and the cartridge, and the interface providing electrical coupling between the power supply and the cartridge.

5. The apparatus of claim 4 wherein the interface comprises a contact that conducts electricity from the power supply to the cartridge.

6. The apparatus of claim 4 wherein the tube further supports the cartridge.

7. The apparatus of claim 6 wherein:

the cartridge comprises an electrically primed propellant to propel the probe toward the target; and

the power supply is coupled to the cartridge to provide electrical power to activate the propellant.

8. The apparatus of claim 1 further comprising a propulsion system to propel a probe of the cartridge toward the target, the propulsion system responsive to the switch.

9. The apparatus of claim 1 further comprising a fastener to attach the apparatus to the weapon.

10. The apparatus of claim 1 further comprising a device operative to assist aiming of the weapon.

11. The apparatus of claim 1 further comprising a device operative to signal subsequent use of the cartridge, for alerting humans in the vicinity of the weapon.

12. The apparatus of claim 1 further comprising:

a circuit that provides indicia of time; and

a memory that stores the indicia of time in response to operation of the switch.

13. The apparatus of claim 1 wherein the power supply provides power via a contact to the cartridge.

14. The apparatus of claim 1 wherein the form allows the tube, the power supply, and the switch as a unit to replace a bullet when the bullet is removed from the weapon.

15. The apparatus of claim 1 wherein the form allows the tube, the power supply, and the switch to replace as a unit a ballistic launching cartridge when the ballistic launching cartridge is removed from the weapon.

16. The apparatus of claim 1 wherein the tube has a form that allows the tube, the power supply, and the switch to be inserted as a unit at least in part into a barrel of the weapon for mechanical coupling of the mechanism and the switch.

17. The apparatus of claim 1 wherein the tube has a form that allows the tube, the power supply, and the switch to be inserted as a unit at least in part into a barrel, otherwise for launching grenades from the weapon, and allows for mechanical coupling of the mechanism and the switch.

18. An electronic weapon comprising:

the apparatus of claim 1 ; and

the weapon combined with the apparatus.