Systems and methods for pulse delivery

• US 7,821,766 B2
• Filed: 04/19/2007
• Issued: 10/26/2010
• Est. Priority Date: 04/19/2007
• Status: Active Grant

• Current Assignee: Axon Enterprise, Inc.
• Original Assignee: Taser International Incorporated
• Inventors: Brundula, Steven N. D.
• Primary Examiner(s): Nguyen; Danny
• Application Number:
  US11/737,374
• Publication Number:
  US 20080259520A1
• Time in Patent Office: 1,286 Days
• Field of Search: 361/232, 42/10.8, 102/502
• US Class Current: 361/232
• CPC Class Codes: F41B 15/04 with electric stunning-means ejecting electrically charged liquid jets F41B9/00; electric shock creating harpoons F42B30/14; electric circuits or apparatus for killing or stunning H05C
• CPC Class Codes: F41H 13/0012 Electrical discharge weapons, e.g. for stunning
• CPC Class Codes: F41H 13/0025 for remote electrical discharge via conducting wires, e.g. via wire-tethered electrodes shot at a target
• CPC Class Codes: F41H 13/0031 for remote electrical discharge by means of a wireless projectile
• CPC Class Codes: H05C 1/06 operating only when touched

Abstract

An apparatus for interfering with locomotion of a target by conducting a current through the target includes according to various aspects of the present invention a transformer, a capacitance, a charge detector, and a processor. The transformer has a secondary winding that is coupled to the target to provide the current. The capacitance is in series with the secondary winding and is charged to a voltage. The charge detector detects a charge provided through the target by the capacitance and the secondary winding. The processor sets the voltage (e.g., for charging for a next pulse) responsive to the charge detected by the charge detector.

Claims

1. A method performed by an apparatus, the apparatus for interfering with voluntary locomotion by a target by conducting a current through the target, the method comprising:

charging a capacitance in accordance with a goal;

discharging the capacitance to provide the current, wherein the current causes pain or skeletal muscle contractions that interfere with voluntary locomotion by the target;

monitoring a charge of the current; and

in response to monitoring, adjusting the goal.

2. The method of claim 1 wherein discharging comprises forming a magnetic field that later collapses to continue the current.

3. The method of claim 1 wherein the goal comprises a voltage of the capacitance at which charging is complete.

4. The method of claim 1 wherein the goal comprises a duration upon lapse thereof charging is complete.

5. The method of claim 1 wherein adjusting comprises increasing the goal.

6. The method of claim 1 wherein adjusting comprises decreasing the goal.

7. The method of claim 1 wherein the goal comprises a quantity of pulses for charging.

8. The method of claim 1 wherein a result of monitoring comprises indicia of a quantity of the charge.

9. The method of claim 1 wherein:

monitoring comprises integrating the current; and

a result of monitoring comprises indicia of a quantity of charge.

10. The method of claim 1 wherein:

the current comprises a series of pulses; and

the method further comprises adjusting the goal for each pulse of the series.

11. The method of claim 1 wherein the goal comprises a quantity of charge delivered through the target.

12. A method performed by an apparatus, the apparatus for interfering with voluntary locomotion by a target by conducting a current through the target, the method comprising:

charging a capacitance;

discharging the capacitance in accordance with a goal to provide the current, wherein the current causes pain or skeletal muscle contractions that interfere with voluntary locomotion by the target;

monitoring a charge of the current; and

in response to monitoring, adjusting the goal.

13. The method of claim 12 wherein discharging comprises forming a magnetic field that later collapses to continue the current.

14. The method of claim 12 wherein the goal comprises a voltage of the capacitance at which discharging is complete.

15. The method of claim 12 wherein the goal comprises a duration upon lapse thereof discharging is complete.

16. The method of claim 12 wherein adjusting comprises increasing the goal.

17. The method of claim 12 wherein adjusting comprises decreasing the goal.

18. The method of claim 12 wherein the goal comprises a quantity of charge delivered through the target.

19. The method of claim 12 wherein a result of monitoring comprises indicia of a quantity of the charge.

20. The method of claim 12 wherein:

monitoring comprises integrating the current; and

a result of monitoring comprises indicia of a quantity of the charge.

21. The method of claim 12 wherein:

the current comprises a series of pulses; and

the method further comprises adjusting the goal for each pulse of the series.

22. An apparatus for interfering with locomotion of a target by conducting a current through the target, the apparatus comprising:

a transformer having a secondary winding, the secondary winding coupled to the target to provide the current;

a capacitance in series with the secondary winding;

a detector that detects a quantity of charge provided through the target by the capacitance and the secondary winding; and

a processor that controls recharging of the capacitance in response to the detector.

23. The apparatus of claim 22 wherein the detector comprises an integrator.

24. The apparatus of claim 22 wherein the detector comprises a shunt in series with the secondary winding.

25. The apparatus of claim 22 further comprising a diode that allows the current to bypass the capacitance.

26. The apparatus of claim 22 further comprising:

a second capacitance, in series with a primary winding of the transformer, for establishing an ionization of air in a gap for delivering the current.

27. The apparatus of claim 22 further comprising a trigger wherein the processor controls charging of the capacitance in response to the trigger.

28. A memory for a processor, the memory comprising:

indicia of a prescribed series of pulses; and

instructions for the processor to perform, in accordance with the indicia of the prescribed series, a method for interfering with voluntary locomotion by a target by conducting a current through the target, the method including;

charging a capacitance in accordance with a goal;

discharging the capacitance to provide the current, wherein the current causes pain or skeletal muscle contractions that interfere with voluntary locomotion by the target;

monitoring a charge of the current; and

in response to monitoring, adjusting the goal.

29. The memory of claim 28 further comprising:

a log that records a date and a time of delivery of the current.

30. The memory of claim 28 wherein instructions for performing the method implements closed loop control.

31. A memory for a processor, the memory comprising instructions for the processor to perform a method for interfering with voluntary locomotion by a target by conducting a current through the target, the method including:

charging a capacitance in accordance with a goal;

discharging the capacitance to provide the current, wherein the current causes pain or skeletal muscle contractions that interfere with voluntary locomotion by the target;

monitoring a charge of the current; and

in response to monitoring, adjusting the goal.

32. A memory for a processor, the memory comprising:

indicia of a prescribed series of pulses; and

instructions for the processor to perform, in accordance with the indicia of the prescribed series, a method for interfering with voluntary locomotion by a target by conducting a current through the target, the method including;

charging a capacitance;

discharging the capacitance in accordance with a goal to provide the current, wherein the current causes pain or skeletal muscle contractions that interfere with voluntary locomotion by the target;

monitoring a charge of the current; and

in response to monitoring, adjusting the goal.

33. The memory of claim 32 further comprising:

a log that records a date and a time of delivery of the current.

34. The memory of claim 32 wherein instructions for performing the method implements closed loop control.

35. A memory for a processor, the memory comprising instructions for the processor to perform a method for interfering with voluntary locomotion by a target by conducting a current through the target, the method including:

charging a capacitance;

discharging the capacitance in accordance with a goal to provide the current, wherein the current causes pain or skeletal muscle contractions that interfere with voluntary locomotion by the target;

monitoring a charge of the current; and

in response to monitoring, adjusting the goal.