Fluorescent lamp heat-dissipating apparatus

• US 5,537,301 A
• Filed: 09/01/1994
• Issued: 07/16/1996
• Est. Priority Date: 09/01/1994
• Status: Expired due to Fees

• Current Assignee: Pacific Scientific Company (Parker-Hannifin Corporation)
• Original Assignee: Pacific Scientific Company (Parker-Hannifin Corporation)
• Inventors: Martich, Mark E.
• Primary Examiner(s): Gromada, Denise L.
• Assistant Examiner(s): Cariaso, Alan B.
• Application Number:
  US08/300,423
• Time in Patent Office: 684 Days
• Field of Search: 313/36, 313/44, 313/493, 362/218, 362/294, 362/373, 362/216, 362/217, 362/363, 362/226
• US Class Current: 362/218
• CPC Class Codes: F21V 19/0095 of U-shaped tubular light sources, e.g. compact fluorescent tubes
• CPC Class Codes: F21V 29/506 of globes, bowls or cover glasses
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/80 with pins or wires
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21Y 2103/37 U-shaped
• CPC Class Codes: H01J 61/325 U-shaped lamps
• CPC Class Codes: H01J 61/327 "Compact"-lamps, i.e. lamps having a folded discharge path
• CPC Class Codes: H01J 61/34 Double-wall vessels or containers
• CPC Class Codes: H01J 61/52 Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space heating or cooling arrangements to promote ionisation for starting H01J61/54

Abstract

A fluorescent lamp dissipates heat from the lamp tube to a vented air stream within a lamp globe and to ambient air outside of the lamp. The lamp apparatus includes a base that mounts and provides electric current to a fluorescent illumination tube, a vented lamp globe and a thermally conductive heat dissipater engaged with the illumination tube. The heat dissipater thermally conducts heat from the illumination tube and transfers the heat to an air current within the lamp globe. A mounting element mounts the lamp globe and the heat dissipater with the base.

Claims

1. In fluorescent lamp apparatus having a base that mounts, and applies electrical current to, a fluorescent illumination tube, the improvement comprising

a lamp globe for enclosing the fluorescent illumination tube and elongated between a mounting end and a distal end having a first vent aperture,

a heat dissipater in engagement with the fluorescent illumination tube within the lamp globe for conducting heat from the fluorescent illumination tube and for transferring heat to an air current within the lamp globe between the mounting end and the first vent aperture, and

means for mounting the lamp globe and the dissipater with the base and for providing a second vent aperture for the passage of ambient air into the lamp globe proximal to the mounting end.

2. In fluorescent lamp apparatus according to claim 1, the further improvement wherein said mounting means includes a bracket for mountingly seating with at least one of said base and said lamp globe and supportingly attached to said heat dissipater.

3. In fluorescent lamp apparatus according to claim 1, the further improvement wherein said heat dissipater includes a heat transfer element for receiving by thermal conduction heat conducted to said dissipater from the fluorescent illumination tube and for transferring said heat to ambient air.

4. In fluorescent lamp apparatus according to claim 1, the further improvement wherein said heat dissipater includes

a heat receiving portion in engagement with the fluorescent illumination tube within the lamp globe for receiving by conduction heat from the fluorescent illumination tube, and

a heat discharge portion thermally conductively coupled with the heat receiving portion for dissipating heat therefrom to ambient air.

5. In fluorescent lamp apparatus according to claim 1, the further improvement wherein the heat dissipater is in removable and replaceable engagement with the fluorescent illumination tube.

6. In fluorescent lamp apparatus according to claim 1, the further improvement wherein the heat dissipater is in resiliently compressive engagement with the fluorescent illumination tube.

7. In fluorescent lamp apparatus according to claim 1, the further improvement wherein the heat dissipater includes at least one resilient member removably and replaceably engaged with the fluorescent illumination tube.

8. In fluorescent lamp apparatus according to claim 7, the further improvement wherein the heat dissipater includes coil spring means circumferentially disposed around and engaged with the fluorescent illumination tube.

9. In fluorescent lamp apparatus according to claim 1, the further improvement wherein the heat dissipater includes a mounting bracket portion for seating the heat dissipater on the base.

10. In fluorescent lamp apparatus according to claim 4, the further improvement wherein the heat dissipater includes a mounting bracket portion for seating the heat dissipater on the base, and wherein the bracket portion is thermally conductively coupled with at least one of the heat discharging portion and the heat receiving portion of the heat dissipater.

19. In fluorescent lamp apparatus according to claim 1 wherein said heat dissipater further includes means for maintaining at least a portion of said illumination tube at a temperature within a selected temperature range to attain maximal lighting efficiency.

20. In fluorescent lamp apparatus according to claim 19 wherein said selected temperature range is between about 25°

C. and about 55°

C.

11. In fluorescent lamp apparatus having a base that mounts and applies electrical current to a fluorescent illumination tube, the improvement comprising

a heat dissipater in removable and replaceable engagement with the fluorescent illumination tube for conducting heat from the fluorescent illumination tube and for transferring heat to an air current proximal to the fluorescent illumination tube, said heat dissipater further including means for maintaining a portion of the illumination tube at a temperature within a selected temperature range to attain maximal lamp efficiency, and

means for mounting a lamp globe and the heat dissipater with the base and for providing a vent aperture for the passage of ambient air into a lamp globe proximal to the mounting thereof.

18. In fluorescent lamp apparatus according to claim 11 wherein said selected temperature range is between about 25°

C. and about 55°

C.

12. Fluorescent lamp apparatus for dissipating heat from within a lamp tube thereof, comprising

a base that mounts and applies electric current to a fluorescent illumination tube,

a lamp globe for enclosing the fluorescent illumination tube and having a mounting end and having a first vent aperture therethrough,

a heat dissipater in removable and replaceable engagement with the fluorescent illumination tube within the lamp globe for conducting heat from the fluorescent illumination tube and for transferring heat to an air current within the lamp globe between the mounting end and the first vent aperture, and

means for mounting the lamp globe and the dissipater with the base and for providing a second vent aperture for the passage of ambient air into the lamp globe proximal to the mounting end.

13. In fluorescent lamp apparatus having a base that mounts, and applies electrical current to, a fluorescent illumination tube, the improvement comprising

a vented lamp globe for enclosing the fluorescent illumination tube and having a mounting, and

a heat dissipater of thermally conductive material in removable and replaceable engagement with the fluorescent illumination tube within the lamp globe for conducting heat from the fluorescent illumination tube and for dissipating heat therefrom to air external to the globe, said dissipater being arranged for mounting with the lamp globe and with the base.

14. In fluorescent lamp apparatus having a base that mounts, and applies electrical current to, a fluorescent illumination tube, the improvement comprising

a lamp globe for enclosing the fluorescent illumination tube and elongated between a mounting end and a distal end having a first vent aperture,

a heat dissipater in engagement with the fluorescent illumination tube within the lamp globe for conducting heat from the fluorescent illumination tube and for transferring heat to an air current within the lamp globe between the mounting end and the first vent aperture, said heat dissipater includes a heat transfer element disposed at least in part external to said globe and external to said base for the transfer of heat therefrom to ambient air, said heat transfer element receiving by thermal conduction heat conducted to said dissipater from the fluorescent illumination tube, and

means for mounting the lamp globe and the dissipater with the base and for providing a second vent aperture for the passage of ambient air into the lamp globe proximal to the mounting end.

15. In fluorescent lamp apparatus having a base that mounts, and applies electrical current to, a fluorescent illumination tube, the improvement comprising

a lamp globe for enclosing the fluorescent illumination tube and elongated between a mounting end and a distal end having a first vent aperture,

a heat dissipater in engagement with the fluorescent illumination tube within the lamp globe for conducting heat from the fluorescent illumination tube and for transferring heat to an air current within the lamp globe between the mounting end and the first vent aperture, said heat dissipater includes

a heat receiving portion in engagement with the fluorescent illumination tube within the lamp globe for receiving by conduction heat from the fluorescent illumination tube, and

a heat discharge portion thermally conductively coupled with the heat receiving portion and disposed at least in part external to the lamp globe and external to the base for dissipating heat therefrom to ambient air, and

means for mounting the lamp globe and the heat dissipater with the base and for providing a second vent aperture for the passage of ambient air into the lamp globe proximal to the mounting end of the globe.

16. In fluorescent lamp apparatus according to claim 15, the further improvement wherein the heat dissipater further includes a mounting bracket portion for seating the heat dissipater on the base and for mountingly seating the lamp globe on the heat dissipater, and wherein the bracket portion is thermally conductively coupled with at least one of the heat discharging portion and the heat receiving portion of the heat dissipater.

17. In fluorescent lamp apparatus having a base that mounts, and applies electrical current to, a fluorescent illumination tube, the improvement comprising

a lamp globe for enclosing the fluorescent illumination tube and elongated between a mounting end and a distal end having a first vent aperture,

a heat dissipater in engagement with the fluorescent illumination tube within the lamp globe for conducting heat from the fluorescent illumination tube and for transferring heat to an air current within the lamp globe between the mounting end and the first vent aperture, wherein the heat dissipater includes

at least one resilient member removably and replaceably engaged with the fluorescent illumination tube, and

coil spring means circumferentially disposed around and engaged with the fluorescent illumination tube, and

means for mounting the lamp globe and the dissipater with the base and for providing a second vent aperture for the passage of ambient air into the lamp globe proximal to the mounting end.