EP0080820A3 - Improvements in or relating to discharge lamps - Google Patents

Improvements in or relating to discharge lamps Download PDF

Info

Publication number
EP0080820A3
EP0080820A3 EP82306041A EP82306041A EP0080820A3 EP 0080820 A3 EP0080820 A3 EP 0080820A3 EP 82306041 A EP82306041 A EP 82306041A EP 82306041 A EP82306041 A EP 82306041A EP 0080820 A3 EP0080820 A3 EP 0080820A3
Authority
EP
European Patent Office
Prior art keywords
lamp
dose
discharge lamps
high pressure
wick
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.)
Withdrawn
Application number
EP82306041A
Other languages
German (de)
French (fr)
Other versions
EP0080820A2 (en
Inventor
Frank Lawrence Whittaker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thorn EMI PLC
Original Assignee
Thorn EMI PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thorn EMI PLC filed Critical Thorn EMI PLC
Publication of EP0080820A2 publication Critical patent/EP0080820A2/en
Publication of EP0080820A3 publication Critical patent/EP0080820A3/en
Withdrawn legal-status Critical Current

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
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J61/28—Means for producing, introducing, or replenishing gas or vapour during operation of the lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

In high pressure discharge lamps, for example, high pressure sodium lamps improved colour, closer to white, has been sought, for example by the use of external heat shields to raise the temperature of the dose amalgam.
The present invention introduces a wick (18) disposed around the shank (2) of one electrode. Made of a material which is wetted by the liquid dose in use it acts, if the lamp is appropriately orientated, to move the dose (8) by surface tension to a hotter part of the lamp. Effective control of vapour pressure and therefore lamp colour can be obtained by suitable tailoring of the wick dimensions or materials or both.
EP82306041A 1981-11-27 1982-11-12 Improvements in or relating to discharge lamps Withdrawn EP0080820A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8135910 1981-11-27
GB8135910 1981-11-27

Publications (2)

Publication Number Publication Date
EP0080820A2 EP0080820A2 (en) 1983-06-08
EP0080820A3 true EP0080820A3 (en) 1983-12-14

Family

ID=10526224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82306041A Withdrawn EP0080820A3 (en) 1981-11-27 1982-11-12 Improvements in or relating to discharge lamps

Country Status (2)

Country Link
EP (1) EP0080820A3 (en)
JP (1) JPS5897251A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6120326A (en) * 1984-07-07 1986-01-29 Ushio Inc Method for exposing material of semiconductor wafer by mercury lamp
GB8725912D0 (en) * 1987-11-05 1987-12-09 Emi Plc Thorn Discharge arc lamp
JP3507179B2 (en) * 1995-01-13 2004-03-15 日本碍子株式会社 High pressure discharge lamp
US6963158B2 (en) * 2003-08-15 2005-11-08 Osram Sylvania Inc. Mount assembly for discharge lamps

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1463568A (en) * 1966-01-13 1966-06-03 Lampes Sa Device applicable to electric discharge lamps containing metal iodides in saturating vapor, in particular sodium iodide
US3604972A (en) * 1970-02-25 1971-09-14 Us Army Metal vapor lamp with alkali metal reservoir means
FR2255703A1 (en) * 1973-12-19 1975-07-18 Philips Nv
FR2363187A1 (en) * 1976-08-26 1978-03-24 Gen Electric HIGH PRESSURE METAL STEAM LAMP

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1463568A (en) * 1966-01-13 1966-06-03 Lampes Sa Device applicable to electric discharge lamps containing metal iodides in saturating vapor, in particular sodium iodide
US3604972A (en) * 1970-02-25 1971-09-14 Us Army Metal vapor lamp with alkali metal reservoir means
FR2255703A1 (en) * 1973-12-19 1975-07-18 Philips Nv
FR2363187A1 (en) * 1976-08-26 1978-03-24 Gen Electric HIGH PRESSURE METAL STEAM LAMP

Also Published As

Publication number Publication date
JPS5897251A (en) 1983-06-09
EP0080820A2 (en) 1983-06-08

Similar Documents

Publication Publication Date Title
BR8300847A (en) HEAT RESPONSIVE PACIFIER SET AND PROCESS TO PRODUCE A HEAT RESPONSIVE PACIFIER SET
JPS5622653A (en) Crackkresistant heattabsorbing fused glass having low treatment temperature for airtightly sealing electronic parts
ES2044266T3 (en) ASSEMBLY INCLUDING EXTERNAL AND INTERIOR REFRACTORY MEMBERS OF CERAMIC MATERIAL.
ATE204858T1 (en) STABLE VITAMIN A
US4156826A (en) Mercury arc lamps
EP0080820A3 (en) Improvements in or relating to discharge lamps
EP0175333A3 (en) Electric lamp including a containment coating as part thereof
DE3267590D1 (en) Insecticide composition, its preparation and its use
JPS54118674A (en) Low pressure mercury vapor discharge lamp
KR830007431A (en) Method for manufacturing soda silicate and apparatus therefor
GB2001049A (en) Sealing composition
JPS53144805A (en) Hermetically sealing method in metallic capsule for material to be treated in hot static pressure pressing method
JPS57187860A (en) Discharge lamp with mercury of very high pressure
JPS55161357A (en) Metal vapour discharge lamp
ES8304892A1 (en) Process for the obtaining of glass articles that present a lubricated surface resistant to the stripe. (Machine-translation by Google Translate, not legally binding)
JPS5642947A (en) Circular fluorescent lamp and manufacturing method thereof
JPS57123631A (en) Manufacturing method of low pressure mercury vapor discharge lamp
JPS56162468A (en) Metal vapor discharge lamp
GB2176898A (en) Ion-sensitive electrode and method of making the same
KR890702237A (en) Hot cathode type low pressure rare gas discharge lamp
JPS6465787A (en) Silicon carbide heater
JPS5394868A (en) Heat treatment method
JPS5763761A (en) High pressure sodium lamp
SE8003028L (en) discharge lamp
JPS54118673A (en) Low pressure mercury vapor discharge lamp

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): DE FR GB NL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19831208

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WHITTAKER, FRANK LAWRENCE