GB1464063A - Low-pressure gas discharge lamp - Google Patents
Low-pressure gas discharge lampInfo
- Publication number
- GB1464063A GB1464063A GB2868275A GB2868275A GB1464063A GB 1464063 A GB1464063 A GB 1464063A GB 2868275 A GB2868275 A GB 2868275A GB 2868275 A GB2868275 A GB 2868275A GB 1464063 A GB1464063 A GB 1464063A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- vol
- space
- glass
- electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/10—Shields, screens, or guides for influencing the discharge
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Discharge Lamp (AREA)
Abstract
1464063 Metal vapour lamps PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 8 July 1975 [11 July 1974 5 June 1975] 28682/75 Heading H1D [Also in Division C1] A low pressure discharge lamp (e.g. Hg or Na with or without luminescent coatings) has a solid filamentary body permeable to the discharge; the body being present over at least half (e.g. 80%) the electrode distance and thinly distributed over the space, the ratio between volumes of body and space being between 3.10<SP>-7</SP> f/# and 3.10<SP>-2</SP> f/# where f is the quotient of the volume and area of the body in microns and # equals 5 microns. The body may be interrupted, as shown into packets 7, 8, 9. The light output of the lamp may be increased without increase of energy consumption by the lamp and stabilizing element. Between 5 x 10<SP>-6</SP> and 5 Î 10<SP>-3</SP> mg. of the body/cubic mm. may be present. Preferably the electrode distance/ cross-sectional diameter of the discharge space is >5. Preferably the density near the axis differs from that near the wall. A reduced near axial density reduces uneven temperature distributions producing mercury or sodium deposits, while an increased near axial density in a circular-cylindrical lamp increases light output. The body may be glass, quartz or metal (e.g. W) wool for example. Metal wool may be provided with insulating material to improve potential distribution, and the wire may be 5 to 100 Ám diameter. The body may be luminescent glass or glas coated with Mn and/or Sb activated calcium halophosphate for example or gehlenite glass for sodium resistance. Excessive absorption may be countered by a surface reflective coating of zirconium oxide, magnesium oxide or barium sulphate. Cooling for optimum efficiency may be by radiation shields on the electrode stems, or alloys in the discharge space (e.g. In or Hg amalgams). The lamp may be U-shaped (Figs. 3, and 4, not shown). Comparative test results are detailed and specify for example, dimensions, pressures, currents and efficiencies. Hg may be with 75% by vol. Ar and 25% by vol. Ne at 2À5 torr, or with 72% by vol. Ne and 28% by vol. He at 4 or 6 torr. A favourable ratio of power supplied/losses in the power supply apparatus is obtained for V/l<7, where V is the operating voltage in volts and l is the electrode separation in ems. Reproduction applications using aperture lamps is mentioned.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7409366.A NL163669C (en) | 1974-07-11 | 1974-07-11 | LOW PRESSURE GAS DISCHARGE LAMP. |
NL7506654A NL7506654A (en) | 1975-06-05 | 1975-06-05 | Low pressure gas discharge lamp - has gas discharge permeable solid element at specified point between electrodes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1464063A true GB1464063A (en) | 1977-02-09 |
Family
ID=26645017
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2868275A Expired GB1464063A (en) | 1974-07-11 | 1975-07-08 | Low-pressure gas discharge lamp |
Country Status (16)
Country | Link |
---|---|
JP (1) | JPS5837663B2 (en) |
AR (1) | AR203929A1 (en) |
AT (1) | AT352217B (en) |
AU (1) | AU501410B2 (en) |
BE (1) | BE831176A (en) |
BR (1) | BR7504412A (en) |
CA (1) | CA1038922A (en) |
CH (1) | CH600732A5 (en) |
DD (1) | DD120971A5 (en) |
DE (1) | DE2529005C3 (en) |
ES (1) | ES439264A1 (en) |
FR (1) | FR2278158A1 (en) |
GB (1) | GB1464063A (en) |
HU (1) | HU171653B (en) |
IT (1) | IT1039816B (en) |
SE (1) | SE419489B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0031175A1 (en) * | 1979-12-12 | 1981-07-01 | Koninklijke Philips Electronics N.V. | Low-pressure mercury vapour discharge lamp |
GB2169440A (en) * | 1984-12-14 | 1986-07-09 | Matsushita Electric Works Ltd | High pressure discharge lamp |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7603285A (en) * | 1976-03-30 | 1977-10-04 | Philips Nv | PROCESS FOR MANUFACTURING A LOW-PRESSURE GAS DISCHARGE LAMP. |
NL179771C (en) * | 1976-06-17 | 1986-11-03 | Philips Nv | LOW PRESSURE GAS DISCHARGE LAMP. |
JPS5937231B2 (en) * | 1976-06-23 | 1984-09-08 | エプソン株式会社 | Ink ribbon reversing device |
JPS5818236Y2 (en) * | 1976-06-28 | 1983-04-13 | 日本電気ホームエレクトロニクス株式会社 | discharge lamp lighting device |
JPS5310343A (en) * | 1976-07-16 | 1978-01-30 | Mitsubishi Electric Corp | Apparatus for electrolytic processing |
NL7701910A (en) * | 1977-02-23 | 1978-08-25 | Philips Nv | LOW-PRESSURE GAS DISCHARGE LAMP. |
NL174104C (en) * | 1977-08-23 | 1984-04-16 | Philips Nv | LAMP UNIT. |
JPS55144651A (en) * | 1979-04-28 | 1980-11-11 | Matsushita Electric Works Ltd | Fluorescent lamp |
JPS5667657U (en) * | 1979-10-30 | 1981-06-05 | ||
JPS5674510A (en) * | 1979-11-21 | 1981-06-20 | Toshiba Corp | Liquid fuel combustion device |
JPS62163251A (en) * | 1986-01-14 | 1987-07-20 | Matsushita Electric Works Ltd | Discharge lamp |
US9318311B2 (en) * | 2011-10-11 | 2016-04-19 | Kla-Tencor Corporation | Plasma cell for laser-sustained plasma light source |
-
1975
- 1975-06-28 DE DE2529005A patent/DE2529005C3/en not_active Expired
- 1975-07-08 HU HU75PI00000479A patent/HU171653B/en unknown
- 1975-07-08 DD DD187165A patent/DD120971A5/xx unknown
- 1975-07-08 SE SE7507777A patent/SE419489B/en unknown
- 1975-07-08 AT AT525175A patent/AT352217B/en not_active IP Right Cessation
- 1975-07-08 IT IT7525202A patent/IT1039816B/en active
- 1975-07-08 CH CH893175A patent/CH600732A5/xx not_active IP Right Cessation
- 1975-07-08 GB GB2868275A patent/GB1464063A/en not_active Expired
- 1975-07-09 AU AU82860/75A patent/AU501410B2/en not_active Expired
- 1975-07-09 ES ES439264A patent/ES439264A1/en not_active Expired
- 1975-07-09 CA CA231,152A patent/CA1038922A/en not_active Expired
- 1975-07-09 BE BE158134A patent/BE831176A/en unknown
- 1975-07-10 FR FR7521724A patent/FR2278158A1/en active Granted
- 1975-07-10 JP JP50084046A patent/JPS5837663B2/en not_active Expired
- 1975-07-11 AR AR259545A patent/AR203929A1/en active
- 1975-07-11 BR BR7504412*A patent/BR7504412A/en unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0031175A1 (en) * | 1979-12-12 | 1981-07-01 | Koninklijke Philips Electronics N.V. | Low-pressure mercury vapour discharge lamp |
GB2169440A (en) * | 1984-12-14 | 1986-07-09 | Matsushita Electric Works Ltd | High pressure discharge lamp |
GB2169440B (en) * | 1984-12-14 | 1989-08-16 | Matsushita Electric Works Ltd | High pressure discharge lamp |
Also Published As
Publication number | Publication date |
---|---|
HU171653B (en) | 1978-02-28 |
AU8286075A (en) | 1977-01-13 |
JPS5837663B2 (en) | 1983-08-17 |
DE2529005C3 (en) | 1979-12-06 |
BR7504412A (en) | 1976-07-06 |
IT1039816B (en) | 1979-12-10 |
BE831176A (en) | 1976-01-09 |
SE419489B (en) | 1981-08-03 |
ES439264A1 (en) | 1977-03-01 |
AU501410B2 (en) | 1979-06-21 |
FR2278158A1 (en) | 1976-02-06 |
DE2529005A1 (en) | 1976-01-29 |
DD120971A5 (en) | 1976-07-05 |
AR203929A1 (en) | 1975-10-31 |
CA1038922A (en) | 1978-09-19 |
FR2278158B1 (en) | 1979-06-22 |
DE2529005B2 (en) | 1979-04-12 |
AT352217B (en) | 1979-09-10 |
ATA525175A (en) | 1979-02-15 |
CH600732A5 (en) | 1978-06-30 |
JPS5131082A (en) | 1976-03-16 |
SE7507777L (en) | 1976-01-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |