JPS54147675A - Incandescent lamp - Google Patents

Incandescent lamp

Info

Publication number
JPS54147675A
JPS54147675A JP5442878A JP5442878A JPS54147675A JP S54147675 A JPS54147675 A JP S54147675A JP 5442878 A JP5442878 A JP 5442878A JP 5442878 A JP5442878 A JP 5442878A JP S54147675 A JPS54147675 A JP S54147675A
Authority
JP
Japan
Prior art keywords
coil
double
turns
krypton
argon
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
JP5442878A
Other languages
Japanese (ja)
Inventor
Masanobu Miyake
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 JP5442878A priority Critical patent/JPS54147675A/en
Publication of JPS54147675A publication Critical patent/JPS54147675A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To improve the efficiency of an incandesent lamp and maintain the average use life by increaseing the volumetric ratio of a sealed-in gas (argon or krypton), and specifying the relationship between the pitch of a double-coil filament and the coil length.
CONSTITUTION: The volumetric ratio of the seal-in amount of argon or krypton to that of an inert gas such as nitrogen is increased up to 90W95% so as to enhance the efficiency of an incandescent lamp by at least about 0.5%. A double-coil filament is so designed that the relationship between the number of turns of the coil and the coil length in lighting condition satisfies the following: Y≥8.86x + 0.32, where y=arc voltage/number of turns of double coil, x=coil length in lighting condition/number of turns of double coil. This maintains the sufficient arc voltage and prevents reduction of average use life.
COPYRIGHT: (C)1979,JPO&Japio
JP5442878A 1978-05-10 1978-05-10 Incandescent lamp Pending JPS54147675A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5442878A JPS54147675A (en) 1978-05-10 1978-05-10 Incandescent lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5442878A JPS54147675A (en) 1978-05-10 1978-05-10 Incandescent lamp

Publications (1)

Publication Number Publication Date
JPS54147675A true JPS54147675A (en) 1979-11-19

Family

ID=12970437

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5442878A Pending JPS54147675A (en) 1978-05-10 1978-05-10 Incandescent lamp

Country Status (1)

Country Link
JP (1) JPS54147675A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0632483A1 (en) * 1993-06-30 1995-01-04 Hayashibara, Ken Incandescent lamp and its use

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0632483A1 (en) * 1993-06-30 1995-01-04 Hayashibara, Ken Incandescent lamp and its use

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