Gas discharge lamp temperature control
AssigneeBHK, Inc.
InventorsSteven H. Boland, John S. Goldner
Life of this patent
Estimating the term…
Abstract
A low pressure gas discharge lamp of the capillary bore type is equipped with a temperature control system whereby the electrode containment section and the light output section of the lamp are at higher temperatures than the capillary bore section. Vapor flow from the higher temperature sections to the relatively low capillary bore section maintains a satisfactory vapor fill in the bore section for attainment of a high light output. In one arrangement, the temperature control system includes a heater and a heat sink at selected points along the lamp envelope. In another form of the invention, the control system is solely a heat sink in thermal contact with the capillary bore section.
Claims9
A gas discharge lamp comprising:
- an envelope having an electrode-containment section, a linear capillary bore section, and a light output section,
- said electrode-containment section comprising two separate electrode chambers,
- said linear capillary bore section comprising two separate capillary bores extending, respectively, from respective ones of said electrode chambers,
- said light output section comprising light output means spaced from said capillary bores to define a transverse connector passage between said bores,
- an electrode extending into each electrode chamber,
- a fluorescence-producing vaporizable material in said envelope,
- a tubular metal sheath extending along and about said envelope with the outer surface of the envelope spaced from the sheath inner surface, and
- a thermal connection between the capillary bore section of the envelope and the metal sheath, said thermal connection being thermally isolated from the electrode-containment section and the light output section, whereby the capillary bore section is maintained at a lower temperature than the electrode-containment section and the light output section.
Dependencies are inferred from the claim text.