US4074164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sun lamp
Assignee: Osram GmbH
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Filing: 1977-03-24
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Granted: 1978-02-14
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Expires: 1997-03-24
Abstract
Abstract A sun lamp comprising an arc tube integrally mounted in an envelope transmissive to UV-radiation. The arc tube is of the halogen metal vapor discharge lamp type and contains mercury, together with (i) at least one rare earth metal halide or (ii) iron halide. The light transmissive envelope comprises a glass which transmits large amounts of the UV-A component of ultraviolet radiation, and transmits substantially no UV-C component of the radiation. The ratio of transmitted UV-A to UV-B is similar to that in natural radiation.
Inventors
- 👤 Helmut Leyendecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:43
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/38; H01J61/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
104 words
A sun lamp comprising an arc tube integrally mounted within a surrounding ultraviolet transmissive envelope, said arc tube comprises a halogen metal vapor discharge lamp containing mercury and (i) at least one rare earth metal halide or (ii) iron halide; said ultraviolet light transmissive envelope comprising glass having a spectral transmission factor of approximately zero at 280 nm, of about 30% at 300 nm, and maximum transmittance being attained at above 350 nm, said sun lamp transmitting radiation having a ratio of UV-A to UV-B substantially the same as sunlight with the radiation in the UV-C region being so small as to be harmless.
Claim 2
Dependent Claim
104 words
A sun lamp comprising an arc tube integrally mounted within a surrounding ultraviolet transmissive envelope, said arc tube comprises a halogen metal vapor discharge lamp containing mercury and (i) at least one rare earth metal halide or (ii) iron halide; said ultraviolet light transmissive envelope comprising glass having a spectral transmission factor of approximately zero at 280 nm, of about 30% at 300 nm, and maximum transmittance being attained at above 350 nm, said sun lamp transmitting radiation having a ratio of UV-A to UV-B substantially the same as sunlight with the radiation in the UV-C region being so small as to be harmless.
Claim 3
Dependent Claim
41 words
The sun lamp of claim 1 wherein said envelope is shaped and only partially covered with a reflective metal layer to form a reflective bulb transmitting ultraviolet light through the portion of the envelope not covered by said reflective metal layer.
Claim 4
Dependent Claim
29 words
The sun lamp of claim 1, wherein the fill of the arc tube comprises mercury, at least one rare earth metal, mercury halide, thallium halide, cessium halide and argon.
Claim 5
Dependent Claim
21 words
The sun lamp of claim 1, wherein the fill of the arc tube comprises mercury, iron, tin, mercury halide and argon.
Claim 6
Dependent Claim
28 words
The sun lamp of claim 2, wherein said reflector bulb is shaped as a paraboloid with a flattened bowl comprising the ultraviolet light transmissive portion of said envelope.
Claim 7
Dependent Claim
24 words
The sun lamp of claim 2, wherein the longitudinal axis of the arc tube is coincident with the longitudinal axis of the reflector bulb.
Claim 8
Dependent Claim
29 words
The sun lamp of claim 6, wherein the arc tube is mounted in the reflector bulb and positioned between the base and the largest diameter of the reflector bulb.
Claim 9
Dependent Claim
29 words
The sun lamp of claim 5, wherein the fill of the arc tube comprises mercury, at least one rare earth metal, mercury halide, thallium halide, cesium halide and argon.
Claim 10
Dependent Claim
29 words
The sun lamp of claim 7, wherein the fill of the arc tube comprises mercury, at least one rare earth metal, mercury halide, thallium halide, cesium halide and argon.
Claim 11
Dependent Claim
21 words
The sun lamp of claim 5, wherein the fill of the arc tube comprises mercury, iron, tin, mercury halide and argon.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |