JPS5498072A - Incandescent lamp - Google Patents
Incandescent lampInfo
- Publication number
- JPS5498072A JPS5498072A JP380478A JP380478A JPS5498072A JP S5498072 A JPS5498072 A JP S5498072A JP 380478 A JP380478 A JP 380478A JP 380478 A JP380478 A JP 380478A JP S5498072 A JPS5498072 A JP S5498072A
- Authority
- JP
- Japan
- Prior art keywords
- filament
- bulb
- lamp
- rotating
- intercrosses
- 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
Links
Abstract
PURPOSE: To provide an incadescent lamp wherein the configuration of the inner surface of a lamp coated at the bulb inner surface with an infrared ray reflection film is formed into an ellipsoidal surface, and the length of the filament is controlled, whereby ununiformity in the temperature on the filament is reduced and the life of the lamp is prolonged.
CONSTITUTION: The inner surface of the bulb 1 is formed into a rotating ellipsoidal surface obtained by rotating an ellipse having focuses F1 and F2 using its arbor as a rotating shaft A. The inner surface of the bulb 1 is coated with an infrared ray reflection film. The filament 3 is constituted such that the longitudinal central shaft of the filament 3 intercrosses perpendicularly said rotating shaft A, and said filament 3 intercrosses perpendicularly the tracks of said focuses F1 and F2. When the length of the filament 3 is represented by L, the distance l is set so that l/ L is within the range of from 0.02 to 0.2.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP380478A JPS5498072A (en) | 1978-01-18 | 1978-01-18 | Incandescent lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP380478A JPS5498072A (en) | 1978-01-18 | 1978-01-18 | Incandescent lamp |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5498072A true JPS5498072A (en) | 1979-08-02 |
JPS6131593B2 JPS6131593B2 (en) | 1986-07-21 |
Family
ID=11567373
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP380478A Granted JPS5498072A (en) | 1978-01-18 | 1978-01-18 | Incandescent lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5498072A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5682565A (en) * | 1979-09-17 | 1981-07-06 | Duro Test Corp | Incandescent lamp |
JPH03283350A (en) * | 1990-03-30 | 1991-12-13 | Toshiba Lighting & Technol Corp | Incandescent lamp |
-
1978
- 1978-01-18 JP JP380478A patent/JPS5498072A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5682565A (en) * | 1979-09-17 | 1981-07-06 | Duro Test Corp | Incandescent lamp |
JPH03283350A (en) * | 1990-03-30 | 1991-12-13 | Toshiba Lighting & Technol Corp | Incandescent lamp |
Also Published As
Publication number | Publication date |
---|---|
JPS6131593B2 (en) | 1986-07-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5498072A (en) | Incandescent lamp | |
JPS5498071A (en) | Incandescent lamp | |
JPS5225487A (en) | Incandescent lamp | |
JPS5314983A (en) | High coloring fluorescent lamp | |
JPS5331236A (en) | Infrared bulb for medical use | |
JPS546764A (en) | Fluorescent substance and its manufacture | |
JPS5369483A (en) | Reflecting non-straight tubular fluorescent lamp | |
JPS5383572A (en) | Color picture tube | |
JPS5376690A (en) | Solid light emitting device | |
JPS52120587A (en) | Bulb lamp | |
JPS54152369A (en) | Incandescent electric bulb with infrared reflecting films | |
JPS5345075A (en) | Fluorescent lamp | |
JPS52152674A (en) | Fluorescent lamp | |
JPS5394469A (en) | Incandescent light bulb with light-scattering film | |
JPS5310568A (en) | Fluorescent lamp incorporating hig-pressure mercury vapor | |
JPS51145185A (en) | Small bulb provided with reflecting mirror surface | |
JPS5381010A (en) | Illumination tube for facsimile | |
JPS5241181A (en) | Photo-chromic material | |
JPS5360259A (en) | Detector | |
JPS5287877A (en) | Incandescent lamp | |
JPS52126083A (en) | Projector | |
JPS535790A (en) | A ir-tight sealing | |
JPS51138084A (en) | Incandescent lamp | |
JPS5211679A (en) | Lighting fixtures | |
JPS5340024A (en) | Production of light-diffusing substance suspension |