FR2133088A6 - Thorium emitter electrode - for discharge lamps wherein thorium pellets are heated to 2000 C in mfr - Google Patents

Thorium emitter electrode - for discharge lamps wherein thorium pellets are heated to 2000 C in mfr

Info

Publication number
FR2133088A6
FR2133088A6 FR7112325A FR7112325A FR2133088A6 FR 2133088 A6 FR2133088 A6 FR 2133088A6 FR 7112325 A FR7112325 A FR 7112325A FR 7112325 A FR7112325 A FR 7112325A FR 2133088 A6 FR2133088 A6 FR 2133088A6
Authority
FR
France
Prior art keywords
thorium
pellets
discharge lamps
mfr
heated
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
Application number
FR7112325A
Other languages
French (fr)
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.)
Compagnie des Lampes
Original Assignee
Compagnie des Lampes
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 Compagnie des Lampes filed Critical Compagnie des Lampes
Priority to FR7112325A priority Critical patent/FR2133088A6/en
Priority to US00137818A priority patent/US3753028A/en
Priority to GB1226671A priority patent/GB1307034A/en
Priority to ES1971197179U priority patent/ES197179Y/en
Priority to DE2125375A priority patent/DE2125375C3/en
Priority to LU65006D priority patent/LU65006A1/xx
Priority to BE781065A priority patent/BE781065A/en
Priority to IT6795472A priority patent/IT958718B/en
Priority to NL7204462A priority patent/NL7204462A/xx
Application granted granted Critical
Publication of FR2133088A6 publication Critical patent/FR2133088A6/en
Expired 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
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/073—Main electrodes for high-pressure discharge lamps
    • H01J61/0735—Main electrodes for high-pressure discharge lamps characterised by the material of the electrode
    • H01J61/0737—Main electrodes for high-pressure discharge lamps characterised by the material of the electrode characterised by the electron emissive material

Landscapes

  • Discharge Lamp (AREA)

Abstract

Thorium emitter for discharge lamps comprises a cylindrical W shaft welded at the end to a coil of W, a second coil surrounding this and a third coil at its upper and inside the first coil, the coils forming a chamber to contain two pellets, one for Th emission and the other contg. Ti, underneath the end of the W shaft, as in prior art, but the pellets have been made by compaction at 15-20 t/cm2 and sintered at 2000 degrees C and have very good surface condition.
FR7112325A 1970-05-22 1971-04-07 Thorium emitter electrode - for discharge lamps wherein thorium pellets are heated to 2000 C in mfr Expired FR2133088A6 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
FR7112325A FR2133088A6 (en) 1971-04-07 1971-04-07 Thorium emitter electrode - for discharge lamps wherein thorium pellets are heated to 2000 C in mfr
US00137818A US3753028A (en) 1970-05-22 1971-04-27 Discharge lamp electrode
GB1226671A GB1307034A (en) 1970-05-22 1971-04-29 Discharge lamp electrodes
ES1971197179U ES197179Y (en) 1970-05-22 1971-05-10 ELECTRODE FOR DISCHARGE LAMP.
DE2125375A DE2125375C3 (en) 1970-05-22 1971-05-21 Electrode for a discharge lamp
LU65006D LU65006A1 (en) 1971-04-07 1972-03-21
BE781065A BE781065A (en) 1971-04-07 1972-03-22 ELECTRODES FOR DISCHARGE LAMPS
IT6795472A IT958718B (en) 1971-04-07 1972-03-25 ELECTRODE FOR ELECTRIC DISCHARGE LAMPS
NL7204462A NL7204462A (en) 1971-04-07 1972-04-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7112325A FR2133088A6 (en) 1971-04-07 1971-04-07 Thorium emitter electrode - for discharge lamps wherein thorium pellets are heated to 2000 C in mfr

Publications (1)

Publication Number Publication Date
FR2133088A6 true FR2133088A6 (en) 1972-11-24

Family

ID=9074921

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7112325A Expired FR2133088A6 (en) 1970-05-22 1971-04-07 Thorium emitter electrode - for discharge lamps wherein thorium pellets are heated to 2000 C in mfr

Country Status (5)

Country Link
BE (1) BE781065A (en)
FR (1) FR2133088A6 (en)
IT (1) IT958718B (en)
LU (1) LU65006A1 (en)
NL (1) NL7204462A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0759633A1 (en) * 1995-08-17 1997-02-26 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH High pressure discharge lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0759633A1 (en) * 1995-08-17 1997-02-26 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH High pressure discharge lamp

Also Published As

Publication number Publication date
BE781065A (en) 1972-07-17
LU65006A1 (en) 1972-07-10
NL7204462A (en) 1972-10-10
IT958718B (en) 1973-10-30

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