JPS569960A - High pressure metal vapour discharge lamp - Google Patents

High pressure metal vapour discharge lamp

Info

Publication number
JPS569960A
JPS569960A JP8399079A JP8399079A JPS569960A JP S569960 A JPS569960 A JP S569960A JP 8399079 A JP8399079 A JP 8399079A JP 8399079 A JP8399079 A JP 8399079A JP S569960 A JPS569960 A JP S569960A
Authority
JP
Japan
Prior art keywords
electrode
luminous
bulb
luminous bulb
high pressure
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.)
Granted
Application number
JP8399079A
Other languages
Japanese (ja)
Other versions
JPS6161223B2 (en
Inventor
Kenichi Kawasumi
Kenji Narisei
Sadao Kaiwa
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8399079A priority Critical patent/JPS569960A/en
Priority to IT49140/80A priority patent/IT1145438B/en
Publication of JPS569960A publication Critical patent/JPS569960A/en
Publication of JPS6161223B2 publication Critical patent/JPS6161223B2/ja
Granted 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
    • H01J61/84—Lamps with discharge constricted by high pressure
    • H01J61/88—Lamps with discharge constricted by high pressure with discharge additionally constricted by envelope

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

PURPOSE:To effectively utilize the heating effect and heat conductive effect occurring at each bulb and due to heat generated by its respective electrode by properly setting the distance from the electrode center to the inner surface of a luminous bulb. CONSTITUTION:The relation between the whole length l(mm.) from the free end center of an electrode to the inner surface of a luminous bulb, which surface is in the rear with respect to the opposite electrode, and the weight m(g) of the electrode in the luminous bulb, and the lamp current I(A) is set at follows: 0.1<=m/I<=0.16 and I<=l<13. Thus, the coated area of a heat insulation film provided only at a lower end part of the upright luminous bulb is minimized. As the coated area of the heat insulation film can be reduced, luminous efficiency, average colour display estimation value, luminous flux maintenance rate, starting performance etc. can be improved.
JP8399079A 1979-07-04 1979-07-04 High pressure metal vapour discharge lamp Granted JPS569960A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP8399079A JPS569960A (en) 1979-07-04 1979-07-04 High pressure metal vapour discharge lamp
IT49140/80A IT1145438B (en) 1979-07-04 1980-07-02 ANTI-TUMORAL AGENT BASED ON POLYALKAL BENZYLENE COMPOUNDS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8399079A JPS569960A (en) 1979-07-04 1979-07-04 High pressure metal vapour discharge lamp

Publications (2)

Publication Number Publication Date
JPS569960A true JPS569960A (en) 1981-01-31
JPS6161223B2 JPS6161223B2 (en) 1986-12-24

Family

ID=13817970

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8399079A Granted JPS569960A (en) 1979-07-04 1979-07-04 High pressure metal vapour discharge lamp

Country Status (2)

Country Link
JP (1) JPS569960A (en)
IT (1) IT1145438B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63147346U (en) * 1987-03-19 1988-09-28

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5397279A (en) * 1977-02-04 1978-08-25 Toshiba Corp Metal halide lamp

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5397279A (en) * 1977-02-04 1978-08-25 Toshiba Corp Metal halide lamp

Also Published As

Publication number Publication date
IT8049140A0 (en) 1980-07-02
JPS6161223B2 (en) 1986-12-24
IT1145438B (en) 1986-11-05

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