IT1271730B - Incandescent electric lamp with supplementary filament - Google Patents
Incandescent electric lamp with supplementary filamentInfo
- Publication number
- IT1271730B IT1271730B ITMI942494A ITMI942494A IT1271730B IT 1271730 B IT1271730 B IT 1271730B IT MI942494 A ITMI942494 A IT MI942494A IT MI942494 A ITMI942494 A IT MI942494A IT 1271730 B IT1271730 B IT 1271730B
- Authority
- IT
- Italy
- Prior art keywords
- filament
- electric lamp
- incandescent electric
- supplementary
- incandescent
- Prior art date
Links
- 239000011521 glass Substances 0.000 abstract 2
Landscapes
- Resistance Heating (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
An incandescent electric lamp with a back-up filament. The lamp comprises a main metallic filament which is made incandescent by the passage of current, for the emission of light, located within a glass bulb, and also comprises at least one supplementary filament in the same glass bulb, connected electrically in parallel with the main filament. The risks of a simultaneous burn-out of both filaments are thus significantly reduced. <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI942494A IT1271730B (en) | 1994-12-12 | 1994-12-12 | Incandescent electric lamp with supplementary filament |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI942494A IT1271730B (en) | 1994-12-12 | 1994-12-12 | Incandescent electric lamp with supplementary filament |
Publications (3)
Publication Number | Publication Date |
---|---|
ITMI942494A0 ITMI942494A0 (en) | 1994-12-12 |
ITMI942494A1 ITMI942494A1 (en) | 1996-06-12 |
IT1271730B true IT1271730B (en) | 1997-06-04 |
Family
ID=11369977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ITMI942494A IT1271730B (en) | 1994-12-12 | 1994-12-12 | Incandescent electric lamp with supplementary filament |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1271730B (en) |
-
1994
- 1994-12-12 IT ITMI942494A patent/IT1271730B/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
ITMI942494A1 (en) | 1996-06-12 |
ITMI942494A0 (en) | 1994-12-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19971222 |