Lamp having protective dome

• US 5,760,531 A
• Filed: 11/19/1996
• Issued: 06/02/1998
• Est. Priority Date: 11/19/1996
• Status: Expired due to Fees

• Current Assignee: 911EP Incorporated (Safariland LLC)
• Original Assignee: 911 Emergency Products, Inc. (Safariland LLC)
• Inventors: Pederson, John C.
• Primary Examiner(s): PATEL, NIMESHKUMAR D
• Application Number:
  US08/753,042
• Time in Patent Office: 560 Days
• Field of Search: 313/25, 313/113, 313/110, 313/634, 362/231, 362/240, 362/247, 362/255, 362/256, 362/367
• US Class Current: 313/25
• CPC Class Codes: F21S 41/00 Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps reversing lights F21S43/00
• CPC Class Codes: F21S 45/33 specially adapted for headlamps
• CPC Class Codes: F21S 45/48 with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
• CPC Class Codes: F21S 45/50 Waterproofing
• CPC Class Codes: F21V 29/15 Thermal insulation
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/86 Ceramics or glass
• CPC Class Codes: F21V 31/03 with provision for venting for vehicle head lights F21S45/33; for vehicle rear lights F21S41/192
• CPC Class Codes: F21Y 2103/30 curved
• CPC Class Codes: F21Y 2113/00 Combination of light sources

Abstract

A xenon light assembly having a gas filled glass tube bent into a suitable shape and mounted to a base pedestal material. A glass dome is sized and mounted to seal and fit over the glass tube and about the base pedestal to provide a weather seal for the glass tube and to provide a superior color filtration to the light produced by the lamp.

Claims

1. A gas discharge lamp and protective glass dome, comprising:

(a) an integral base pedestal without air passages having a cylindrical upper portion and a circumferential shoulder about said upper portion;

(b) a xenon-filled glass tube supported on said base pedestal, said xenon-filled glass tube having an anode wire, a cathode wire, and a trigger wire extending therefrom and passing through said base pedestal; and

(c) a glass dome fitted over said cylindrical upper portion, said dome having a lower edge resting on said shoulder and a sealant engaged to said lower edge and said shoulder establishing an airtight configuration between said glass dome and said base pedestal, said glass dome further being tinted for the provision of a colored light and being separated from said glass tube to dissipate heat generated by said glass tube.

2. The apparatus of claim 1, wherein said glass tube is bent into a 360°

loop and the respective ends of said tube are supported on said base pedestal.

3. A gas discharge lamp and protective dome, comprising:

(a) a sealed glass tube having xenon gas entrapped therein and having an anode electrode and a cathode electrode, and respective electrical conductors connected to said electrodes and passing through said glass tube;

(b) an electrical trigger conductor helically wound about the exterior surface of said tube;

(c) a base pedestal having an upper surface supporting said tube, and having a cylindrical upper portion and having a recessed lower surface, said electrical conductors all passing through said base pedestal without establishing air passages and having respective conductor ends projecting from said lower surface; and

(d) a cylindrical glass dome fitted about said base pedestal cylindrical upper portion, whereby said sealed glass tube is enclosed by said glass dome and a sealant engaged to said glass dome and to said base pedestal cylindrical upper portion establishing an airtight configuration between said glass dome and said base pedestal cylindrical upper portion minimize condensation and clouding within said glass dome, said glass dome being separated from said glass tube to dissipate heat generated by said glass tube.

4. The apparatus of claim 3, wherein said glass dome is made from bore silicate material.

5. The apparatus of claim 4, wherein said glass dome is colored.

6. The apparatus of claim 5, wherein said glass tube is formed into a complete loop wherein respective ends of said tube are aligned in side-by-side relationship.

7. A gas discharge lamp and light fixture, comprising:

(a) a lamp base and xenon-filled tube supported on said lamp base, said lamp base having a cylindrical portion having a diameter of about one inch;

(b) a glass dome fitted over said xenon-filled tube and sealed about the cylindrical portion of said lamp base establishing an airtight configuration between said glass dome and said cylindrical portion to minimize condensation and clouding within said glass dome, said glass dome being separated from said glass tube to dissipate heat generated by said tube;

(c) a light reflector having an opening slightly larger than said cylindrical lamp base portion, and means for attaching said lamp base to said light reflector; and

(d) a lens cover fitted over said light reflector, thereby creating a closed compartment for said glass dome.

8. The apparatus of claim 7, wherein said lamp base further comprises a shoulder for attaching to said reflector.

9. The apparatus of claim 8, wherein said glass dome is colored and semi-transparent.

10. A gas discharge lamp assembly, comprising:

(a) a light reflector having a reflective forwardly facing surface and a rear surface;

(b) at least two circular openings through said light reflector;

each opening being sized to receive a xenon discharge lamp;

(c) a pair of xenon discharge lamps in said openings, each lamp having a base pedestal and a cylindrical portion, and a glass dome sealed about said cylindrical portion and projecting forwardly adjacent said reflective surface each of said glass domes being in airtight sealing engagement with said cylindrical portions to minimize condensation and clouding within said glass domes, said glass domes being separated from said xenon discharge lamps to disburse heat generated by said xenon discharge lamps; and

(d) a lens cover fitted about the edge of said light reflector, thereby forming a light compartment for said pair of xenon discharge lamps.

11. The apparatus of claim 10, wherein said lens cover is a clear, non-colored material and each of said glass domes is a colored material.