JPS5397285A - Method of evacuating air from electric bulb - Google Patents

Method of evacuating air from electric bulb

Info

Publication number
JPS5397285A
JPS5397285A JP1150577A JP1150577A JPS5397285A JP S5397285 A JPS5397285 A JP S5397285A JP 1150577 A JP1150577 A JP 1150577A JP 1150577 A JP1150577 A JP 1150577A JP S5397285 A JPS5397285 A JP S5397285A
Authority
JP
Japan
Prior art keywords
bulb
filament
evacuating air
electric bulb
heating
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.)
Pending
Application number
JP1150577A
Other languages
Japanese (ja)
Inventor
Eizo Goto
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP1150577A priority Critical patent/JPS5397285A/en
Publication of JPS5397285A publication Critical patent/JPS5397285A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To provide a method of evacuating air from an electric bulb, comprising the step of removing oxides on the filament by heating the filament after filling of forming gas into the bulb, and the step of heating the filament to a higher temperature to promote clarification and degasification of bulk getter, bulb, etc., thus preventing contamination of the inner surface or other of bulb from being caused by evaporation of oxides on the surface of filament.
COPYRIGHT: (C)1978,JPO&Japio
JP1150577A 1977-02-04 1977-02-04 Method of evacuating air from electric bulb Pending JPS5397285A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1150577A JPS5397285A (en) 1977-02-04 1977-02-04 Method of evacuating air from electric bulb

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1150577A JPS5397285A (en) 1977-02-04 1977-02-04 Method of evacuating air from electric bulb

Publications (1)

Publication Number Publication Date
JPS5397285A true JPS5397285A (en) 1978-08-25

Family

ID=11779867

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1150577A Pending JPS5397285A (en) 1977-02-04 1977-02-04 Method of evacuating air from electric bulb

Country Status (1)

Country Link
JP (1) JPS5397285A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5446979A (en) * 1992-04-20 1995-09-05 Hitachi Construction Machinery Co., Ltd. Hydraulic circuit system for civil engineering and construction machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5446979A (en) * 1992-04-20 1995-09-05 Hitachi Construction Machinery Co., Ltd. Hydraulic circuit system for civil engineering and construction machines

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