Flashlight with selectable output level switching

• US 7,220,016 B2
• Filed: 12/09/2003
• Issued: 05/22/2007
• Est. Priority Date: 12/09/2003
• Status: Active Grant

• Current Assignee: SureFire LLC (Surefire Holdings LLC)
• Original Assignee: SureFire LLC (Surefire Holdings LLC)
• Inventors: Kim, Paul Y., Matthews, John W., Hunt, William A.
• Primary Examiner(s): O'Shea; Sandra
• Assistant Examiner(s): HAN, JASON
• Application Number:
  US10/732,883
• Publication Number:
  US 20050122714A1
• Time in Patent Office: 1,260 Days
• Field of Search: 362196-208, 362/802, 362/184, 362230-231, 362/295, 362/394, 362/251, 315/185.S, 315/200.A
• US Class Current: 362/205
• CPC Class Codes: F21L 4/022 Pocket lamps
• CPC Class Codes: F21L 4/027 the light sources being a LED
• CPC Class Codes: F21V 23/0414 specially adapted to be used with portable lighting devices
• CPC Class Codes: F21V 23/0421 the switch being part of, or disposed on the tail cap portion thereof
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2113/17 forming a single encapsulated light source
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/14 using electrical feedback from LEDs or from LED modules
• CPC Class Codes: H05B 45/30 Driver circuits
• CPC Class Codes: Y10S 362/802 Position or condition responsive switch

Abstract

A flashlight has a lamp, a power source, two switches, and a controller connected to the switches. The first switch controls delivery of power to the lamp, and the second switch selects a dimmed brightness level. The first switch may invoke the dimmed level, or a maximum brightness level. The second switch may be a ring rotatable about the axis the flashlight, and either rotatable through a wide range of positions, with sensor circuitry to detect the absolute position, or having a limited range of rotation, with dimmed level selection provided by a duration of momentary rotation in either direction. The second switch may be positioned outside a leak resistant housing, and may include a magnet detectable by magnetic field sensors within the chamber.

Claims

1. A flashlight comprising:

a lamp;

a power storage element;

a first switch;

a second switch;

an electronic controller;

the controller having a first switch input connected to the first switch;

the controller having a second switch input connected to the second switch;

the controller being operable in response to actuation of the first switch to deliver power to the lamp;

the controller being operable in response to a signal received from the second switch to establish a degree of the delivered power, such that the second switch determines a brightness of the lamp;

wherein the flashlight is an elongated body defining an axis, and the second switch is a ring rotatable about the axis;

wherein the flashlight includes a leak-resistant housing defining a chamber, and wherein the second switch is positioned outside the chamber; and

wherein the second switch includes a sensor component within the housing, the sensor component operable to detect the position of the second switch.

2. The flashlight of claim 1 wherein the second switch is operably connected directly to the second switch input, such that it does not intervene between the power storage element and the lamp.

3. The flashlight of claim 1 wherein the flashlight is an elongated body with the first switch at a first end, and the lamp at an opposed second end, the second switch being closer to the second end than the first end.

4. The flashlight of claim 1 wherein the sensor component is a magnetic field sensor.

5. The flashlight of claim 1 wherein the sensor component is electrically isolated from the second switch.

6. The flashlight of claim 1 wherein the second switch includes a magnet.

7. The flashlight of claim 1 including a plurality of different color lamp components, and wherein the controller is operable in response to a signal received from the second switch to provide a selected power to at least one of the lamp components to provide a selected output color.

8. The flashlight of claim 1 wherein the second switch is movable through a range of angular positions, and the controller is operable to establish the degree of power level based on the absolute position of the switch.

9. The flashlight of claim 1 wherein the second switch is movable through a range of angular positions, and the controller is operable to establish the degree of power level based on a duration of a rotational force applied to the second switch.

10. The flashlight of claim 1 wherein the flashlight has an elongated housing having the lamp at a first end and the first switch at an opposed second end, and including at least two independent electrical paths between the first and second ends.

11. A flashlight comprising:

a lamp;

a power storage element;

a first switch;

a second switch;

an electronic controller;

the controller having a first switch input connected to the first switch;

the controller having a second switch input connected to the second switch;

the controller being operable in response to actuation of the first switch to deliver power to the lamp; and

the controller being operable in response to a signal received from the second switch to establish a degree of the delivered power, such that the second switch determines a brightness of the lamp;

wherein the flashlight is an elongated body defining an axis, having the first switch at a first end and the lamp at an opposed second end;

wherein the second switch is a ring rotatable about the axis and positioned at an intermediate location on the body between the first and second ends;

wherein the first switch is a push-button switch responsive to linear pressure; and

wherein the first switch is positioned on a rear end portion of the body and responsive to linear pressure along the axis.

12. A flashlight comprising:

an elongated housing body defining an axis;

a lamp within the housing;

a power storage element within the housing;

a first switch connected to the housing;

a second switch including a movable portion that is movable with respect to the housing and that includes a magnet;

the second switch including a sensor portion in the housing;

an electronic controller in the housing;

the controller having a first switch input connected to the first switch;

the controller having a second switch input connected to the second switch sensor portion;

the controller being operable in response to actuation of the first switch to deliver power to the lamp;

the controller being operable in response to a signal received from the second switch to establish a degree of the delivered power, such that the second switch determines a brightness of the lamp.

13. The flashlight of claim 12 wherein the sensor portion of the second switch includes a plurality of sensors each connected to the controller.

14. The flashlight of claim 13 wherein each one of the sensors operates to indicate whether the magnet is in a proximate position, such that the position of the magnet is transmitted to the controller based on which sensor the magnet is proximate.

15. The flashlight of claim 12 wherein the first switch is positioned at a first end, and the lamp at an opposed second end, the second switch being closer to the second end than the first end.

16. The flashlight of claim 12 including a plurality of different color lamp components, and wherein the controller is operable in response to a signal received from the second switch to provide a selected power to at least one of the lamp components to provide a selected output color.

17. The flashlight of claim 12 wherein the ring is movable through a range of angular positions, and the controller is operable to establish the degree of power level based on the absolute position of the switch.

18. The flashlight of claim 12 wherein the lamp is positioned at a first end and the first switch at an opposed second end, and including at least two independent electrical paths between the first and second ends.