# US 4,393,323 A · Fluorescent lamp shield

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- Number: US 4,393,323 A
- Document ID: US4393323A
- Status: Granted
- Kind: A
- Application number: 06/227,965
- Filed: 1981-01-23
- Granted: 1983-07-12
- Earliest claimed: 1981-01-23
- Assignees: Plascore, Inc.
- Inventors: Fritz Hubner
- Web page: https://patentgrep.com/patent/US4393323A

## CPC

- F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V 15/00: Protecting lighting devices from damage (protection from thermal damage F21V29/00; gas-tight or water-tight arrangements F21V31/00)
- F21V 17/04: the fastening being onto or by the light source
- 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)
- F21V 29/74: with fins or blades
- F21V 29/89: Metals
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR

## Abstract

An assembly for shielding a fluorescent light tube is disclosed. The assembly includes an elongated plastic, tubular shield having an inner peripheral surface and which is adapted to be disposed around the light tube. An elongated, expanded metal, generally tubular shaped heat sink is positioned adjacent the inner peripheral surface of the shield. The shield and heat sink are supported around the light tube by a pair of end caps.

## Claims

### Claim 1

An assembly for shielding a fluorescent light tube, comprising:
an elongated plastic, tubular shield having an inner peripheral surface;
an elongated, one-piece expanded metal tubular shaped heat sink positioned within the shield and adjacent the inner peripheral surface of the shield, said heat sink defining a plurality of rows of apertures; and
a pair of end caps positioned one at each end of said shield, said end caps including means for receiving the ends of said shield to support the assembly about the light tube.

### Claim 2 (depends on 1)

An assembly as defined by claim 1 wherein said heat sink is a one-piece expanded metal cloth formed by slitting and expanding a sheet of metal material to define said apertures.

### Claim 3 (depends on 2)

An assembly as defined by claim 2 wherein said apertures of said cloth are arranged in a plurality of diagonal rows.

### Claim 4 (depends on 3)

An assembly as defined by claim 3 wherein each of said apertures is bounded by generally parallel strips of metal and wherein all of said strips lie in the same plane when said cloth is unrolled to a flat condition.

### Claim 5 (depends on 4)

An assembly as defined by claim 4 wherein said cloth is formed from an aluminum sheet having a thickness of approximately 0.010 inches and wherein each of said apertures is generally diamond-shaped and said parallel strips each have a length of approximately 0.040 inches and a transverse dimension of approximately 0.070 inches.