# US 5,710,485 A · Neon lamp assembly with RF noise shield

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- Number: US 5,710,485 A
- Document ID: US5710485A
- Status: Granted
- Kind: A
- Application number: 08/557,788
- Filed: 1995-11-13
- Granted: 1998-01-20
- Earliest claimed: 1995-11-13
- Assignees: Osram Sylvania Inc.
- Inventors: Robert J. Schmitt, Jr.
- Web page: https://patentgrep.com/patent/US5710485A

## CPC

- F21V 25/00: Safety devices structurally associated with lighting devices (gas- tight or water-tight arrangements F21V31/00; in general F16P; protective circuit arrangements per se H02H7/00)
- B60Q 1/302: {mounted in the vicinity, e.g. in the middle, of a rear window}
- F21S 43/19: Attachment of light sources or lamp holders
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- B60Q: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS

## Abstract

A neon lamp assembly includes a housing having a cavity with an aperture for emission of light, a neon lamp mounted within the cavity in the housing for emission of light through the aperture and a lens covering the aperture in the housing. Connectors are secured to opposite ends of the neon lamp. Each connector includes a resilient boot that is positioned in a recess in the housing. The resilient boot locates the lamp in the housing and cushions the lamp against shock and vibration. The neon lamp assembly further includes a light-transmissive, conductive mesh covering the aperture in the housing for substantially blocking the emission of RF energy from the housing, and an electrical conductor for coupling the conductive mesh to a reference potential, such as ground. The neon lamp is typically used as a stop light in a vehicle.

## Claims

### Claim 1

A gas discharge lamp assembly comprising:
a housing including an interior cavity having a conductive, reflecting surface, a first sealing edge substantially encircling the cavity with the conductive reflecting surface extending onto the sealing edge, the housing further having an aperture for emission of light;
an elongated, tubular, positive column gas discharge lamp mounted within the cavity in said housing for emission of light through said aperture;
a light-transmissive lens covering the aperture in said housing, having a second sealing edge substantially co-extensive with the first sealing edge;
electrical connectors for coupling electrical energy to said gas discharge lamp;
a light-transmissive, conductive mesh with an integral extension, the conductive mesh covering the aperture in said housing, extending to be substantially co-extensive with and between the first sealing edge, and the second sealing edge, and in contact with the reflective, conductive coating, the mesh being retained between said housing and said lens thereby forming with the reflective conductive surface an RF energy enclosure for the gas discharge lamp, substantially blocking RF energy emitted from said gas discharge lamp; the integral extension extending between the first sealing edge and the second sealing edge to the exterior of the housing to electrically connect the conductive mesh and said reflecting surface to a reference potential.

### Claim 2 (depends on 1)

A gas discharge lamp assembly as defined in claim 1 wherein the first sealing edge, and the second sealing edge form therebetween, at least along a portion, a tongue and groove.

### Claim 3 (depends on 2)

A gas discharge lamp assembly as defined in claim 2 wherein at least a portion of the conductive mesh is positioned between the tongue and the groove.

### Claim 4 (depends on 3)

A gas discharge lamp assembly as defined in claim 3 wherein, and the integral extension extends through the tongue and groove to the exterior of the housing.

### Claim 5 (depends on 4)

A gas discharge lamp assembly as defined in claim 4 wherein a glue is positioned to extend through the conductive mesh to bond the first sealing edge to the second sealing edge while entrapping the conducting mesh therebetween.

### Claim 6

A neon gas discharge lamp assembly comprising:
a housing including a cavity having an aperture for emission of light;
a gas discharge lamp mounted within the cavity in said housing for emission of light through said aperture;
conductors for coupling electrical energy to said neon gas discharge lamp;
a light-transmissive, conductive mesh covering the aperture in said housing for substantially blocking emission of RF energy from said housing;
the housing including a conductive portion which, together with said conductive mesh, substantially surrounds said neon lamp, and
an electrical conductor for coupling said conductive mesh to a reference potential said conductive portion also being electrically connected to said reference potential.

### Claim 7 (depends on 6)

A neon lamp assembly as defined in claim 6 further including a light-transmissive lens covering said aperture and said conductive mesh.

### Claim 8 (depends on 7)

A neon lamp assembly as defined in claim 7 wherein said conductive mesh is retained between said housing said lens.

### Claim 9 (depends on 6)

A neon lamp assembly as defined in claim 6 wherein said conductive portion comprises a conductive surface of said housing, said conductive surface at least in part comprising a reflective surface for directing light emitted by said neon lamp through said aperture.

### Claim 10 (depends on 6)

A neon lamp assembly as defined in claim 6 wherein said conductive mesh has a mesh size selected to substantially block RF energy generated within said neon lamp.

### Claim 11 (depends on 10)

A neon lamp assembly as defined in claim 10 wherein said conductive mesh comprises a grid of about 100 wires per inch in two perpendicular directions, said wires having diameters of about 0.001 inch.

### Claim 12 (depends on 6)

A neon lamp assembly as defined in claim 6 wherein said electrical conductor comprises an integral extension of said conductive mesh external to said housing.

### Claim 13 (depends on 6)

A neon lamp assembly as defined in claim 6 wherein said electrical conductor is retained between said housing and said lens and electrically contacts said conductive mesh.

### Claim 14 (depends on 6)

A neon lamp assembly as defined in claim 6 wherein said electrical conductor extends internally of said housing between said conductive mesh and an external grounding contact.

### Claim 15 (depends on 6)

A neon lamp assembly as defined in claim 6 wherein said electrical conductor extends externally of said housing between said conductive mesh and an external grounding contact.

### Claim 16

A neon lamp assembly comprising:
a housing including a cavity having a conductive, reflecting surface and an aperture for emission of light;
an elongated, tubular neon lamp mounted within the cavity in said housing for emission of light through said aperture;
a light-transmissive lens covering the aperture in said housing;
electrical connectors for coupling electrical energy to said neon lamp;
a light-transmissive, conductive mesh covering the aperture in said housing and retained between said housing and said lens for substantially blocking RF energy emitted from said neon lamp; and
an electrical conductor for connecting said conductive mesh and said reflecting surface to a reference potential.

### Claim 17 (depends on 16)

A neon lamp assembly as defined in claim 16 wherein said conductive mesh has a mesh size selected to substantially block RF energy generated by said neon lamp.

### Claim 18 (depends on 17)

A neon lamp assembly as defined in claim 17 wherein said conductive mesh comprises a grid of about 100 wires per inch in two perpendicular directions, said wires having diameters of about 0.001 inch.

### Claim 19 (depends on 16)

A neon lamp assembly as defined in claim 16 wherein said electrical conductor comprises an integral extension of said conductive mesh external to said housing.