Filtered lamp assembly

• US 5,539,628 A
• Filed: 10/27/1994
• Issued: 07/23/1996
• Est. Priority Date: 10/27/1994
• Status: Expired due to Term

• Current Assignee: James N. Seib
• Original Assignee: James N. Seib
• Inventors: Seib, James N.
• Primary Examiner(s): Husar, Stephen F.
• Application Number:
  US08/329,896
• Time in Patent Office: 635 Days
• Field of Search: 362/62, 362/255, 362/256, 362/267, 362/293, 362/800, 362/363
• US Class Current: 362/471
• CPC Class Codes: F21V 31/00 Gas-tight or water-tight arrangements
• CPC Class Codes: F21V 9/20 Dichroic filters, i.e. devices operating on the principle of wave interference to pass specific ranges of wavelengths while cancelling others
• CPC Class Codes: F21W 2111/00 Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00

Abstract

A filtered lamp assembly useful for illuminating an aircraft cockpit instrument cluster. The lamp assembly includes an incandescent light bulb positioned within a housing that allows the emission of light having a wavelength in the range between about 380 and 620 nanometers. A wire form is positioned within the housing adjacent the light bulb and around the electrical leads extending from the light bulb so as to seal between the housing and the light bulb. The wire form prevents the leakage of a solidifable fluid material that is utilized to fix the light bulb and wire form into position. Further, a process for manufacturing a wire form minimizes the quantity of inventory and tooling necessary for the production of the filtered lamp assembly.

Claims

1. A light assembly, comprising:

a filter housing;

a light bulb positioned within said filter housing, said light bulb having an electrical lead extending therefrom;

a wire form positioned within said housing adjacent said light bulb and around said lead for sealing between said housing and said light bulb; and

a seal fixing said light bulb and wire form into position.

2. The light assembly of claim 1, wherein said housing includes a bore large enough to permit the free passage of the light bulb therein.

3. The light assembly of claim 2, wherein said wire form is metal.

4. The light assembly of claim 3, wherein said housing has an inner cylindrical surface, and wherein said wire form snugly engages said inner cylindrical surface.

5. The light assembly of claim 4, wherein said wire form is a ring structure.

6. The light assembly of claim 5, wherein said wire form is formed of a substantially copper material.

7. The light assembly of claim 6, wherein said housing is sealed.

8. The light assembly of claim 7, wherein said light bulb is an incandescent light bulb.

9. The light assembly of claim 8, wherein at least a portion of said housing is an infrared light filter.

10. The light assembly of claim 9, wherein said infrared light filter allows the emission of light having a wavelength in the range between about 380-620 nanometers.

11. The light assembly of claim 10, wherein said seal is an opaque seal for preventing light from being emitted from one end of said housing, said opaque seal positioned adjacent said wire form with said electrical leads extending therethrough.

12. The light assembly of claim 11, wherein said housing is substantially cylindrical.

13. The light assembly of claim 1, wherein said wire form is a ring structure.

14. The light assembly of claim 1, wherein said housing has an inner cylindrical surface, and wherein said wire form snugly engages said inner cylindrical surface.

15. A method for producing a light assembly, including a housing, a light bulb, and a wire form connecting between the housing and the light bulb, comprising:

positioning the light bulb within the housing;

placing the wire form within the housing adjacent the light bulb to seal between the light bulb and the housing;

dispensing a solidifiable fluid material into one end of the housing to cover the wire form and the light bulb; and

solidifying the material.

16. The method of claim 15, which further includes forming the wire form.

17. The method of claim 16, wherein forming the wire form includes:

providing a quantity of wire;

wrapping at least a portion of the quantity of wire around a mandrel;

cutting the wire into a section having a length that encircles the mandrel;

removing the section from the mandrel; and

positioning the ends of the section adjacent one another.

18. The method of claim 17, which further includes adjusting the section to be planar.

19. In combination:

an aircraft; and

a filtered lamp assembly for illuminating a cockpit instrument, comprising;

a housing;

a light bulb positioned within said housing, said light bulb having at least one electrical lead extending therefrom;

a wire form positioned within said housing adjacent said light bulb for sealing between said housing and said light bulb; and

an opaque seal for preventing light from being emitted from one end of said housing, said opaque seal positioned adjacent said wire form with said at least one electrical lead extending therethrough.

20. The combination of claim 19, wherein said wire form is metal.

21. The combination of claim 19, wherein said housing has an inner cylindrical surface, and wherein said wire form snugly engages said inner cylindrical surface.

22. The combination of claim 21, wherein said wire form is a ring structure.