JPS56138853A - Electric lamp - Google Patents

Electric lamp

Info

Publication number
JPS56138853A
JPS56138853A JP4016880A JP4016880A JPS56138853A JP S56138853 A JPS56138853 A JP S56138853A JP 4016880 A JP4016880 A JP 4016880A JP 4016880 A JP4016880 A JP 4016880A JP S56138853 A JPS56138853 A JP S56138853A
Authority
JP
Japan
Prior art keywords
electric lamp
thermal strain
luminous tube
mol
oxide
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
JP4016880A
Other languages
Japanese (ja)
Other versions
JPH0138355B2 (en
Inventor
Mitsuru Ikeuchi
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.)
Ushio Denki KK
Ushio Inc
Original Assignee
Ushio Denki KK
Ushio Inc
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 Ushio Denki KK, Ushio Inc filed Critical Ushio Denki KK
Priority to JP4016880A priority Critical patent/JPS56138853A/en
Publication of JPS56138853A publication Critical patent/JPS56138853A/en
Publication of JPH0138355B2 publication Critical patent/JPH0138355B2/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
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/302—Vessels; Containers characterised by the material of the vessel

Abstract

PURPOSE:To decrease the thermal strain of te luminous tube of an electric lamp, and obviate any crack generation in the tube by preparing it from a high-purity quartz glass of a low alkali concentration, which is added with an amount within a given range of an oxide of a group III metal. CONSTITUTION:A high-purity quartz glass containing below 20ppm (mol) of alkali impurities, is mixed with 100-3,000ppm (mol) of an oxide of a group III metal in the periodic table such as aluminum, gallium or indium, thus a material for the luminous tube of an electric lamp being prepared. As a result, any thermal strain developed in the luminous tube can be made exceedingly small. Consequently, when the end of a discharge electrode 1 is buried in and fixed to an electrode supporting part 3, any crack generation in the part 3 which might be caused due to thermal strain can be prevented.
JP4016880A 1980-03-31 1980-03-31 Electric lamp Granted JPS56138853A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4016880A JPS56138853A (en) 1980-03-31 1980-03-31 Electric lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4016880A JPS56138853A (en) 1980-03-31 1980-03-31 Electric lamp

Publications (2)

Publication Number Publication Date
JPS56138853A true JPS56138853A (en) 1981-10-29
JPH0138355B2 JPH0138355B2 (en) 1989-08-14

Family

ID=12573228

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4016880A Granted JPS56138853A (en) 1980-03-31 1980-03-31 Electric lamp

Country Status (1)

Country Link
JP (1) JPS56138853A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002352768A (en) * 2001-05-23 2002-12-06 Ushio Inc Ultra-high pressure mercury lamp

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5729090A (en) * 1995-02-21 1998-03-17 General Electric Company Sodium halide discharge lamp

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4913842A (en) * 1972-05-20 1974-02-06
JPS5437388A (en) * 1977-08-29 1979-03-19 Toshiba Corp Discharge lamp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4913842A (en) * 1972-05-20 1974-02-06
JPS5437388A (en) * 1977-08-29 1979-03-19 Toshiba Corp Discharge lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002352768A (en) * 2001-05-23 2002-12-06 Ushio Inc Ultra-high pressure mercury lamp

Also Published As

Publication number Publication date
JPH0138355B2 (en) 1989-08-14

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