Long-range, handheld illumination system

• US 7,344,268 B2
• Filed: 07/07/2003
• Issued: 03/18/2008
• Est. Priority Date: 07/07/2003
• Status: Expired due to Fees

• Current Assignee: Xenonics, Inc. (Xenonics Holdings, Inc.)
• Original Assignee: Xenonics, Inc. (Xenonics Holdings, Inc.)
• Inventors: Jigamian, Gregory Z.
• Primary Examiner(s): Sember; Thomas M.
• Application Number:
  US10/614,635
• Publication Number:
  US 20050007766A1
• Time in Patent Office: 1,716 Days
• Field of Search: 362/294, 362/373, 362/202, 362/203, 362/204, 362/205, 362/206, 362/207, 257/706, 257/720
• US Class Current: 362/202
• CPC Class Codes: F21L 4/005 the device being a pocket lamp F21L4/022, F21L4/045, F21L4/085 take precedence
• CPC Class Codes: F21V 19/0005 of sources having contact pins, wires or blades, e.g. pinch sealed lamp F21V19/001 takes precedence
• CPC Class Codes: F21V 23/0414 specially adapted to be used with portable lighting devices
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21V 9/083 for portable lighting devices
• CPC Class Codes: H01R 13/187 with spring member in the socket
• CPC Class Codes: H01R 33/09 for baseless lamp bulb

Abstract

A long-range, high intensity handheld searchlight has several novel features that improve existing designs. The invention minimizes electrical penetrations to the handheld searchlight by having a magnetic ON/OFF switch. A heat sink is disclosed that is in thermal contact with the external housing without physically penetrating the housing. Additionally, when an external power source in required, power transfer is achieved by inductive coupling to further eliminate electrical penetrations that affect watertight integrity. Also disclosed is a lamp socket assembly for a handheld searchlight that has springs that act as floating contacts within a lamp socket hole. The springs provide proper alignment for the lamp that is critical to achieve a high-intensity light beam. A lamp is disclosed that has its electrodes adjacent to one another for easy installation and removal of the lamp. A shoulder strap is further disclosed to facilitate transportation and use of a handheld searchlight.

Claims

1. A handheld searchlight having an elongated housing and a lamp for efficiently producing a high intensity beam of light output of the housing forward of the lamp, comprising:

a printed circuit board within the housing and having a first surface and a second surface opposite said first surface, and including circuitry to regulate and control power supplied to the lamp; and

a heat sink mounted onto a portion of said first surface of said circuit board, the heat sink also coupled to the housing at least rearward of the lamp to dissipate heat generated by the printed circuit board, wherein the lamp is one of an arc lamp, incandescent lamp, and plasma lamp.

2. The handheld searchlight of claim 1, wherein the heat sink is formed from extruded aluminum material.

3. The handheld searchlight of claim 1, wherein the housing is made from extruded aluminum material for optimum heat transfer characteristics.

4. The handheld searchlight of claim 1, further comprising a battery contained within the housing and electrically connected to the printed circuit board, wherein the battery supplies power to the handheld searchlight.

5. The handheld searchlight of claim 4 wherein the battery has a first end and a second end and one or more elongated sides, and wherein the battery has electrical contacts located alternatively on one of the first end or the second end or one of the elongated sides.

6. The handheld searchlight of claim 1 wherein the housing has a knurled surface to facilitate handling of the handheld searchlight by a user.

7. The handheld searchlight of claim 1, wherein the lamp is one of a mercury arc lamp, xenon arc lamp, metal halide arc lamp, and halogen arc lamp.

8. The searchlight of claim 1, further comprising a reflector disposed about the lamp to reflect light generated by the lamp.

9. A handheld searchlight having a lamp for efficiently producing a high intensity beam of light comprising:

a printed circuit board having a first surface and a second surface opposite said first surface, and including circuitry to regulate and control power supplied to the lamp;

a housing to contain the printed circuit board; and

a heat sink mounted onto a portion of said first surface of said circuit board, the heat sink also coupled to the housing to dissipate heat generated by the printed circuit board, wherein the lamp is one of an arc lamp, incandescent lamp, and plasma lamp, further comprising a battery contained within the housing and electrically connected to the printed circuit board, wherein the battery supplies cower to the handheld searchlight wherein the battery has a first end and a second end and one or more elongated sides, and wherein the battery has electrical contacts located alternatively on one of the first end or the second end or one of the elongated sides, wherein the electrical contacts are sliding contacts.

10. A handheld searchlight having a lamp for efficiently producing a high intensity beam of light comprising:

a printed circuit board having a first surface and a second surface opposite said first surface, and including circuitry to regulate and control power supplied to the lamp;

a housing to contain the printed circuit board;

a heat sink coupled to the printed circuit board, the heat sink also coupled to the housing to dissipate heat generated by the printed circuit board;

a battery contained within the housing and electrically connected to the printed circuit board for supplying power to the handheld searchlight, the battery having a first end and a second end and one or more elongated sides, wherein the battery has sliding electrical contacts located alternatively on one of the first end or the second end or one of the elongated sides.

11. A handheld searchlight having an elongated housing and a lamp for efficiently producing a high intensity beam of light output of the housing forward of the lamp, comprising:

a printed circuit board extending longitudinally within the housing and having a first surface and a second surface opposite said first surface, and including circuitry to regulate and control power supplied to the lamp;

a heat sink mounted onto a portion of said first surface of said circuit board, the heat sink also coupled to the housing to dissipate heat generated by the printed circuit board, and a battery to furnish power electrically coupled to said printed circuit board and located intermediate said second surface of said printed circuit board and an interior surface of said housing, wherein the lamp is one of an arc lamp, incandescent lamp, and plasma lamp.

12. The searchlight of claim 11, wherein printed circuit board extends longitudinally rearward of the lamp and said heat sink is coupled to the housing rearward of the lamp.