Claims
- 1. An electrodeless low pressure discharge lamp, comprising:
- a) a lamp vessel closed in a gas-tight manner and comprising a dome end, an end portion with a distal end opposite said dome end and a tube which extends from said end portion into said lamp vessel towards said dome end and defines a cavity in said lamp vessel extending from said end portion, said lamp vessel having a length dimension from said distal end to said dome end, a first zone adjacent said end portion extending from said end portion toward said dome end for a distance equal to half said length dimension, and a second zone extending from said first zone to said dome end over the remaining half of said length dimension;
- b) a discharge sustaining filling within said lamp vessel; and
- c) a power coupler within said tube in said lamp vessel, said power coupler comprising a core of soft magnetic material, an electric coil around the core, said coil being disposed adjacent to said end portion of said lamp vessel substantially entirely within said first zone, a solid heat conducting rod within said core of soft magnetic material which extends to the exterior of said tube past said end portion, and an elastic material laterally coupling said heat conducting rod to said core of soft magnetic material;
- d) a flange adjacent said end portion and coupled to said heat conducting rod; and
- wherein during lamp operation said lamp consumes a power of at least about 40 W.
- 2. An electrodeless low-pressure discharge lamp as claimed in claim 1, characterized in that the flange has a surface which becomes narrower towards the rod.
- 3. An electrodeless low-pressure discharge lamp as claimed in claim 2, characterized in that the flange is integral with the rod.
- 4. An electrodeless low-pressure discharge lamp as claimed in claim 1, characterized in that the elastic material is silicone rubber.
- 5. An electrodeless discharge lamp according to claim 1, wherein said magnetic core extends substantially entirely within said first zone.
- 6. An electrodeless discharge lamp according to claim 1, wherein said core and coil each extend entirely within said first zone.
- 7. An electrodeless discharge lamp according to claim 5, wherein said coil extends entirely within said first zone.
- 8. An electrodeless low pressure discharge lamp, comprising:
- a) a lamp vessel closed in a gas-tight manner and comprising a dome end, a neck shaped end portion having a distal end opposite said dome end and a tube which extends into said lamp vessel from said distal end and defines a cavity in said lamp vessel extending from said distal end towards said dome end, said tube including a flared portion fused to said neck shaped end portion of said lamp vessel and a cylindrical portion extending from said flared portion towards said dome end, said lamp vessel having a length dimension from said distal end of said end portion to said dome end, a first zone adjacent said end portion extending from said end portion toward said dome end for a distance equal to half said length dimension, and a second zone extending from said first zone to said dome end over the remaining half of said length dimension;
- b) an ionizable filling, comprising rare gas, within said lamp vessel;
- c) a power coupler within said tube in said lamp vessel, said power coupler comprising a core of soft magnetic material, an electric coil around the core, said core and coil being disposed adjacent said flared portion substantially entirely within said first zone, a solid heat conducting rod within said core which extends to the exterior of said tube past said end portion, and an elastic material laterally coupling said heat conducting rod to said core of soft magnetic material; and
- d) a heat dissipating flange adjacent said end portion and coupled to said heat conducting rod for dissipating heat from said core of magnetic material, said flange having a flared shape complementary to said flared end portion of said discharge vessel; and
- wherein during lamp operation said lamp consumes a power of at least about 40 W.
- 9. An electrodeless lower-pressure discharge lamp as claimed in claim 8, characterized in that said flange is integral with said rod.
- 10. An electrodeless low-pressure discharge lamp as claimed in claim 8, characterized in that said elastic material is silicone rubber.
- 11. An electrodeless low-pressure discharge lamp according to claim 8, including means for detachably securing said power coupler to said discharge vessel.
- 12. An electrodeless discharge lamp according to claim 8, wherein said core and coil each extend entirely within said first zone.
- 13. An electrodeless discharge lamp according to claim 8, wherein said coil extends entirely within said first zone.
- 14. An electrodeless low pressure discharge lamp, comprising:
- a) a lamp vessel closed in a gas-tight manner and comprising a dome end, a basal end opposite said dome end, and a re-entrant tube which extends from said basal end into said lamp vessel towards said dome end and defines a cavity within said lamp vessel, said lamp vessel having a length dimension between said basal end and said dome end;
- b) a discharge-sustaining filling within said lamp vessel; and
- c) a power coupler within said tube in said lamp vessel, said power coupler comprising a core of soft magnetic material, an electric coil around the core, said core and coil being disposed adjacent said basal end and extending from said basal end towards said dome end no more than half of said length dimension of said lamp vessel, a solid heat conducting rod within said core which extends to the exterior of said tube past said basal end, and an elastic material laterally coupling said heat conducting rod to said core of soft magnetic material; and
- d) a heat-dissipating flange adjacent said basal end and coupled to said heat conducting rod for dissipating heat from said core of magnetic material, said flange having a flared shape narrowing towards said heat conducting rod, and
- wherein during lamp operation said lamp consumes a power of at least about 40 W.
Priority Claims (1)
Number |
Date |
Country |
Kind |
92202026 |
Jul 1992 |
EPX |
|
Parent Case Info
This is a continuation of application Ser. No. 08/083,803, filed on Sep. 3, 1993, now abandoned.
US Referenced Citations (11)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0384520 |
Aug 1990 |
EPX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
83803 |
Sep 1993 |
|