Brightness controllable flashlights

• US 20050077837A1
• Filed: 10/14/2004
• Published: 04/14/2005
• Est. Priority Date: 01/16/2003
• Status: Active Grant

• Current Assignee: SureFire LLC (Surefire Holdings LLC)
• Original Assignee: SureFire LLC (Surefire Holdings LLC)
• Inventors: Kim, Paul Y., Hunt, William A.
• Granted Patent: US 7,116,061 B2
• Time in Patent Office: Days
• US Class Current: 315/200.A
• CPC Class Codes: F21L 4/025 the light sources being of different shape or type
• CPC Class Codes: F21V 23/02 the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
• CPC Class Codes: F21V 23/0421 the switch being part of, or disposed on the tail cap portion thereof
• CPC Class Codes: F21Y 2113/20 of different form
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/30 Driver circuits
• CPC Class Codes: H05B 45/325 Pulse-width modulation [PWM]
• CPC Class Codes: H05B 45/38 using boost topology
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

Flashlights having selectively controllable brightness levels, a preferred embodiment of which comprises in combination: a battery; a light emitter assembly; a switch in circuit with the battery and the light emitter assembly, the switch having a first OFF position and a second OFF position, the first ON position coupling the battery to the light emitter assembly for producing a first light output, and a second ON position coupling the battery to the light emitter assembly for producing a second light output; and a switch actuator adapted to be coupled to the switch alternatively in its first OFF position and its second OFF position, the switch actuator when coupled in its first OFF position is translatable by a first distance placing the switch in its first ON position and translatable by a second distance placing the switch in its second ON position, the switch actuator when coupled in its second OFF position is translatable by a third distance placing the switch in its first ON position. The switch actuator preferably comprises a click-ON/click-OFF pushbutton switch actuator, for alternatively placing the switch momentarily in its first and second ON positions and constantly in its second ON position from its first OFF position; and for alternatively placing the switch momentarily and constantly in its first ON position from its second OFF position.

Claims

1. In a flashlight, the combination comprising:

a battery;

a light emitter assembly;

a switch in circuit with said battery and said light emitter assembly, said switch having a first OFF position and a second OFF position, a first ON position coupling said battery to said light emitter assembly for producing a first light output, and a second ON position coupling said battery to said light emitter assembly for producing a second light output; and

a switch actuator adapted to be coupled to said switch alternatively in said first OFF position and said second OFF position,

said switch actuator, when coupled to said switch in said first OFF position, translatable by a first distance placing said switch in said first ON position and translatable by a second distance placing said switch in said second ON position,

said switch actuator, when coupled to said switch in said second OFF position, translatable by a third distance placing said switch in said first ON position.

2. The flashlight according to claim 1, wherein:

said switch has a third OFF position; and

said switch actuator is adapted to be coupled to said switch in said third OFF position wherein actuation of said switch actuator is ineffective for placing said switch in either of said first and second ON positions.

3. The flashlight according to claim 1, wherein:

said switch actuator includes a pushbutton depressible by said first, second and third distances for respectively placing said switch in said first ON, second ON and first ON positions.

4. The flashlight according to claim 3, wherein:

said switch actuator comprises a click-ON/click-OFF pushbutton switch actuator for maintaining said switch in said second ON position when said switch actuator is coupled to said switch in said first OFF position and said pushbutton is depressed to its full travel and released.

5. The flashlight according to claim 4, wherein:

said click-ON/click-OFF pushbutton switch actuator maintains said switch in said first ON position when said switch actuator is coupled to said switch in said second OFF position and said pushbutton is depressed to its full travel and released.

6. The flashlight according to claim 1, wherein:

said switch includes an electrical component in circuit with said battery when said switch is in one of said first and second ON positions and not in circuit with said battery when said switch is in the other of said first and second ON positions; and

said light emitter assembly is responsive to whether or not said electrical component is in circuit with said battery for producing said first light output when said electrical component is in circuit with said battery and for producing said second light output when said electrical component is not in circuit with said battery.

7. The flashlight according to claim 6, wherein:

said electrical component is in circuit with said battery when said switch is in said first ON position and is shorted out of said circuit when said switch is in said second ON position.

8. The flashlight according to claim 6, wherein:

said electrical component comprises a resistor.

9. The flashlight according to claim 6, wherein:

said electrical component comprises an inductor.

10. The flashlight according to claim 1, wherein:

said switch includes an electrical component in circuit with said battery when said switch is in one of said first and second ON positions and not in circuit with said battery when said switch is in the other of said first and second ON positions; and

a controller in circuit with said battery, said switch and said light emitter assembly, for detecting whether or not said electrical component is in circuit with said battery when said switch is in either one of said first ON position and said second ON position, and for controlling electrical power to said light emitter assembly for producing said first light output when said electrical component is detected and for producing said second light output when said electrical component is not detected.

11. The flashlight according to claim 10, wherein:

said electrical component is in circuit with said battery when said switch is in said first ON position and is shorted out of said circuit when said switch is in said second ON position.

12. The flashlight according to claim 10, wherein:

said electrical component comprises a resistor.

13. The flashlight according to claim 10, wherein:

said electrical component comprises an inductor.

14. In a flashlight, the combination comprising:

a battery;

a light emitter assembly;

a switch in circuit with said battery and said light emitter assembly, said switch having a first OFF position, a first ON position coupling said battery to said light emitter assembly for producing a first light output, and a second ON position coupling said battery to said light emitter assembly for producing a second light output; and

a click-ON/click-OFF pushbutton switch actuator including a pushbutton, said switch actuator adapted to be coupled to said switch in said first OFF position wherein said pushbutton is depressible by a first distance placing said switch momentarily in said first ON position, said pushbutton is depressible by a second distance placing said switch momentarily in said second ON position, said pushbutton is depressible to its full travel and releasable for maintaining said switch in said second ON position, said switch actuator is adapted for releasing said switch to said first OFF position when said switch is in the maintained second ON position and said pushbutton is depressed to its full travel and released.

15. The flashlight according to claim 14, including:

a battery housing for said battery; and

a tail cap assembly including said switch and said switch actuator, said tail cap assembly being translatable along said battery housing for placing said switch in said first OFF position.

16. The flashlight according to claim 14 wherein:

said switch has a second OFF position; and

said switch actuator is adapted to be coupled to said switch in said second OFF position wherein said pushbutton is depressible by a third distance placing said switch momentarily in said first ON position, said pushbutton is depressible to its full travel and releasable for maintaining said switch in said first ON position, said switch actuator is adapted for releasing said switch to said second OFF position when said switch is in the maintained first ON position and said pushbutton is depressed to its full travel and released.

17. The flashlight according to claim 16, including:

a battery housing for said battery; and

a tail cap assembly including said switch and said switch actuator, said tail cap assembly translatable along said battery housing for placing said switch in said first OFF position and alternatively in said second OFF position.

18. The flashlight according to claim 16, wherein:

said switch has a third OFF position; and

said switch actuator is adapted to be coupled to said switch in said third OFF position wherein depression of said pushbutton is ineffective for placing said switch in either of said first and second ON positions.

19. The flashlight according to claim 18, including:

a battery housing for said battery; and

a tail cap assembly including said switch and said switch actuator, said tail cap assembly translatable along said battery housing for placing said switch alternatively in said first OFF position, said second OFF position and said third OFF position.

20. The flashlight according to claim 14, wherein:

said switch includes an electrical component in circuit with said battery when said switch is in one of said first and second ON positions and not in circuit with said battery when said switch is in the other of said first and second ON positions; and

said light emitter assembly is responsive to whether or not said electrical component is in circuit with said battery for producing said first light output when said electrical component is in circuit with said battery and for producing said second light output when said electrical component is not in circuit with said battery.

21. The flashlight according to claim 20, wherein:

said electrical component is in circuit with said battery when said switch is in said first ON position and is shorted out of said circuit when said switch is in said second ON position.

22. The flashlight according to claim 20, wherein:

said electrical component comprises a resistor.

23. The flashlight according to claim 20, wherein:

said electrical component comprises an inductor.

24. The flashlight according to claim 20, including:

a battery housing for said battery, said battery housing having a rear end; and

a tail cap assembly coupled to said battery housing at said rear end, said tail cap assembly including said switch and said switch actuator.

25. The flashlight according to claim 24, wherein:

said rear end of said battery housing includes an electrically conductive rear edge; and

said switch includes a contact member coupled through said electrical component to a terminal of said battery in said battery housing, said contact member including at least one resilient arm spaced from said conductive rear edge of said battery housing when said switch is in said first OFF position, said at least one resilient arm in conductive contact with said conductive rear edge when said switch is in said first ON position, said at least one resilient arm in conductive contact with said conductive rear edge and with said terminal of said battery shorting out said electrical component when said switch is in said second ON position.

26. The flashlight according to claim 24, wherein:

said tail cap assembly is threadedly rotatable along said rear end of said battery housing for placing said switch in said first OFF position.

27. The flashlight according to claim 14, including:

an electrical component in circuit with said battery when said switch is in said first ON position and not in circuit with said battery when said switch is in said second ON position; and

a controller in circuit with said battery, said switch and said light emitter assembly, for detecting whether or not said electrical component is in circuit with said battery when said switch is in either one of said first ON position and said second ON position, and for controlling electrical power to said emitter assembly for producing a first light output when said electrical component is detected and for producing a second light output when said electrical component is not detected.

28. The flashlight according to claim 27, wherein:

said electrical component is in circuit with said battery when said switch is in said first ON position and is shorted out of said circuit when said switch is in said second ON position.

29. The flashlight according to claim 27, wherein:

said electrical component comprises a resistor.

30. The flashlight according to claim 27, wherein:

said electrical component comprises an inductor.

31. The flashlight according to claim 27, including:

a battery housing for said battery, said battery housing having a rear end; and

a tail cap assembly coupled to said battery housing at said rear end, said tail cap assembly including said switch and said switch actuator.

32. The flashlight according to claim 31, wherein:

said rear end of said battery housing includes an electrically conductive rear edge; and

said switch includes a contact member coupled through said electrical component to a terminal of said battery in said battery housing, said contact member including at least one resilient arm spaced from said conductive rear edge of said battery housing when said switch is in said first OFF position, said at least one resilient arm in conductive contact with said conductive rear edge when said switch is in said first ON position, said at least one resilient arm in conductive contact with said conductive rear edge and with said terminal of said battery shorting out said electrical component when said switch is in said second ON position.

33. The flashlight according to claim 31, wherein:

said tail cap assembly is threadedly rotatable along said rear end of said battery housing for placing said switch in said first OFF position.

34. The flashlight according to claim 16, wherein:

said switch includes an electrical component in circuit with said battery when said switch is in one of said first and second ON positions and not in circuit with said battery when said switch is in the other of said first and second ON positions; and

said light emitter assembly is responsive to whether or not said electrical component is in circuit with said battery for producing said first light output when said electrical component is in circuit with said battery and for producing said second light output when said electrical component is not in circuit with said battery.

35. The flashlight according to claim 34, wherein:

said electrical component is in circuit with said battery when said switch is in said first ON position and is shorted out of said circuit when said switch is in said second ON position.

36. The flashlight according to claim 34, wherein:

said electrical component comprises a resistor.

37. The flashlight according to claim 34, wherein:

said electrical component comprises an inductor.

38. The flashlight according to claim 34, including:

a battery housing for said battery, said battery housing having a rear end; and

a tail cap assembly coupled to said battery housing at said rear end, said tail cap assembly including said switch and said switch actuator.

39. The flashlight according to claim 38, wherein:

said rear end of said battery housing includes an electrically conductive rear edge; and

said switch includes a contact member coupled through said electrical component to a terminal of said battery in said battery housing, said contact member including at least one resilient arm spaced from said conductive rear edge of said battery housing when said switch is in said first and second OFF positions, said at least one resilient arm in conductive contact with said conductive rear edge when said switch is in said first ON position, said at least one resilient arm in conductive contact with said conductive rear edge and with said terminal of said battery shorting out said electrical component when said switch is in said second ON position.

40. The flashlight according to claim 38, wherein:

said tail cap assembly is threadedly rotatable along said rear end of said battery housing for placing said switch in said first OFF position and alternatively in said second OFF position.

41. The flashlight according to claim 38, wherein:

said switch has a third OFF position; and

said switch actuator is adapted to be coupled to said switch in said third OFF position wherein depression of said pushbutton is ineffective for placing said switch in either of said first and second ON positions.

42. The flashlight according to claim 41, wherein:

said tail cap assembly is threadedly rotatable along said rear end of said battery housing for placing said switch alternatively in said first OFF position, said second OFF position and said third OFF position.

43. The flashlight according to claim 16, including:

an electrical component in circuit with said battery when said switch is in said first ON position and not in circuit with said battery when said switch is in said second ON position; and

a controller in circuit with said battery, said switch and said light emitter assembly, for detecting whether or not said electrical component is in circuit with said battery when said switch is in either one of said first ON position and said second ON position, and for controlling electrical power to said emitter assembly for producing a first light output when said electrical component is detected and for producing a second light output when said electrical component is not detected.

44. The flashlight according to claim 43, wherein:

said electrical component is in circuit with said battery when said switch is in said first ON position and is shorted out of said circuit when said switch is in said second ON position.

45. The flashlight according to claim 43, wherein:

said electrical component comprises a resistor.

46. The flashlight according to claim 43, wherein:

said electrical component comprises an inductor.

47. The flashlight according to claim 43, including:

a battery housing for said battery, said battery housing having a rear end; and

a tail cap assembly coupled to said battery housing at said rear end, said tail cap assembly including said switch and said switch actuator.

48. The flashlight according to claim 47, wherein:

said rear end of said battery housing includes an electrically conductive rear edge; and

said switch includes a contact member coupled through said electrical component to a terminal of said battery in said battery housing, said contact member including at least one resilient arm spaced from said conductive rear edge of said battery housing when said switch is in said first OFF position, said at least one resilient arm in conductive contact with said conductive rear edge when said switch is in said first ON position, said at least one resilient arm in conductive contact with said conductive rear edge and with said terminal of said battery shorting out said electrical component when said switch is in said second ON position.

49. The flashlight according to claim 47, wherein:

said tail cap assembly is threadedly rotatable along said rear end of said battery housing for placing said switch in said first OFF position and alternatively in said second OFF position.

50. The flashlight according to claim 47, wherein:

said switch has a third OFF position; and

said switch actuator is adapted to be coupled to said switch in said third OFF position wherein depression of said pushbutton is ineffective for placing said switch in either of said first and second ON positions.

51. The flashlight according to claim 50, wherein:

said tail cap assembly is threadedly rotatable along said rear end of said battery housing for placing said switch alternatively in said first OFF position, said second OFF position and said third OFF position.