US3852630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogen containing high-pressure mercury vapor discharge lamp
Assignee: US Philips Corp
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Filing: 1973-03-12
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Granted: 1974-12-03
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Expires: 1993-03-12
Abstract
Abstract A high-pressure mercury vapor discharge lamp including halide additions. The lamp comprises, next to mercury and a rare gas, one or more of the halogens iodine, bromine and chlorine and furthermore sodium, thallium and possibly indium. The lamp comprises calcium in the form of calcium halide which emits in a broad band in the red part of the spectrum. Cadmium may replace part of mercury. The lamp may comprise as extra additions one or more of the elements scandium, yttrium, lanthanum and the lanthanides.
Inventors
- 👤 G Wesselink
- 👤 H Roelofs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:10
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/12; H01J61/125; H01J61/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
A HIGH-PRESSURE MERCURY VAPOR DISCHARGE LAMP COMPRISING A DISCHARGE VESSEL WHOSE WALL IS SUBJECTED TO A POWER OF BETWEEN 10 AND 100 W PER SQ.CM. DURING OPERATION OF THE LAMP AND CONSISTING OF A RARE GAS AS AN IGNITION GAS, AT LEAST O NE OF THE HALOGENS IODINE, BROMINE AND CHLORINE, FROM 0.5 TO 40 MG OF MERCURY PE CUBIC CM OF CONTENT OF THE DISCHARGE VESSEL, SUCH A QUANTITY OF SODIUM IN THE FORM OF SODIUM HALIDE THAT UNEVAPORATED SODIUM HALIDE IS PRESENT DURING OPERATION, FROM 0.25 TO 25 PERCENT BY WEIGHT OF THALLIUM CALCULATED ON THE QUANTITY OF MERCURY AND FROM 0 TO 15 PERCENT BY WEIGHT OF INDIUM CALCULATED ON THE QUANTITY OF MERCURY, WHEREIN THE DISCHARGE VESSEL FURTHERMORE CONTAINS CALCIUM IN A QUANTITY OF BETWEEN 1 AND 30 PERCENT BY WEIGHT OF THE QUANTITY OF MERCURY AND THAT THE QUANTITY OF HALOGEN IS AT LEAST EQUAL TO THE CHEMICAL EQUIVALENT OF SODIUM AND CALCIUM PRESENT AND IS NOT MORE THAN TWICE THE CHEMICAL EQUIVALENT OF SODIUM, CALCIUM, THALLIUM AND INDIUM PRESENT.
Claim 2
Dependent Claim
175 words
A HIGH-PRESSURE MERCURY VAPOR DISCHARGE LAMP COMPRISING A DISCHARGE VESSEL WHOSE WALL IS SUBJECTED TO A POWER OF BETWEEN 10 AND 100 W PER SQ.CM. DURING OPERATION OF THE LAMP AND CONSISTING OF A RARE GAS AS AN IGNITION GAS, AT LEAST O NE OF THE HALOGENS IODINE, BROMINE AND CHLORINE, FROM 0.5 TO 40 MG OF MERCURY PE CUBIC CM OF CONTENT OF THE DISCHARGE VESSEL, SUCH A QUANTITY OF SODIUM IN THE FORM OF SODIUM HALIDE THAT UNEVAPORATED SODIUM HALIDE IS PRESENT DURING OPERATION, FROM 0.25 TO 25 PERCENT BY WEIGHT OF THALLIUM CALCULATED ON THE QUANTITY OF MERCURY AND FROM 0 TO 15 PERCENT BY WEIGHT OF INDIUM CALCULATED ON THE QUANTITY OF MERCURY, WHEREIN THE DISCHARGE VESSEL FURTHERMORE CONTAINS CALCIUM IN A QUANTITY OF BETWEEN 1 AND 30 PERCENT BY WEIGHT OF THE QUANTITY OF MERCURY AND THAT THE QUANTITY OF HALOGEN IS AT LEAST EQUAL TO THE CHEMICAL EQUIVALENT OF SODIUM AND CALCIUM PRESENT AND IS NOT MORE THAN TWICE THE CHEMICAL EQUIVALENT OF SODIUM, CALCIUM, THALLIUM AND INDIUM PRESENT.
Claim 3
Dependent Claim
90 words
A high-pressure mercury vapour discharge lamp as claimed in claim 1 in which the wall load is between 10 and 30 W per sq.cm and comprising from 0.5 to 10 mg of mercury per cubic cm of content of the discharge vessel, from 5 to 20 percent by weight of thallium and from 0 to 10 percent by weight of indium calculated on the quantity of mercury, and wherein the discharge vessel contains calcium in a quantity of between 5 and 20 percent by weight of the quantity of mercury.
Claim 4
Dependent Claim
16 words
A high-pressure mercury vapour discharge lamp as claimed in claim 1, wherein the halogen is iodine.
Claim 5
Dependent Claim
24 words
A high-pressure mercury vapour discharge lamp as claimed in claim 1, wherein up to 50 percent by weight of mercury is replaced by cadmium.
Claim 6
Dependent Claim
89 words
A high-pressure mercury vapour discharge lamp as claimed in claim 1, wherein the discharge vessel furthermore contains one or more of the elements scandium, yttrium, lanthanum and the lanthanides in a quantity of between 0.1 and 40 percent by weight of the quantity of mercury and that the quantity of halogen is at least equal to the chemical equivalent of sodium, calcium, scandium, yttrium, lanthanum and the lanthanides present and is not more than twice the chemical equivalent of all metals present, with the exception of mercury and cadmium.
Claim 7
Dependent Claim
33 words
A high-pressure mercury vapour discharge lamp as claimed in claim 5, wherein the discharge vessel contains neodymium in a quantity of between 3 and 40 percent by weight of the quantity of mercury.
Claim 8
Dependent Claim
33 words
A high-pressure mercury vapour discharge lamp as claimed in claim 5, wherein the discharge vessel contains dysprosium in a quantity of between 3 and 40 percent by weight of the quantity of mercury.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |