GB293827A - Improvements in electric incandescent lamps - Google Patents
Improvements in electric incandescent lampsInfo
- Publication number
- GB293827A GB293827A GB18609/28A GB1860928A GB293827A GB 293827 A GB293827 A GB 293827A GB 18609/28 A GB18609/28 A GB 18609/28A GB 1860928 A GB1860928 A GB 1860928A GB 293827 A GB293827 A GB 293827A
- Authority
- GB
- United Kingdom
- Prior art keywords
- parallel
- bent
- connecting portions
- incandescent lamps
- parallel lengths
- 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.)
- Expired
Links
- 239000002184 metal Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/02—Incandescent bodies
- H01K1/14—Incandescent bodies characterised by the shape
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
293,827. General Electric Co., Ltd., (Assignees of Patent-Treuhand-Ges, f³r Elektrische Gl³hlampen). July 13, 1927, [Convention date]. Filaments.-An incandescent body, especially for bulbs for projection lamps, consists of a number of parallel lengths of metal ribbon a<1>, a<3> connected together at alternate ends, the connecting portions c being so bent that two groups of the parallel lengths are formed lying in parallel planes so disposed that, when viewed from the direction of principal light emission, they appear to form a substantially uninterrupted luminous surface. The ribbon is first stamped from a sheet in the form shown in Fig. 6, and the connecting portions c are bent so that either only one-half or the whole of the parallel lengths lie in parallel planes, as shown in section respectively in Figs. 4 and 7.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE293827X | 1927-07-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB293827A true GB293827A (en) | 1929-01-10 |
Family
ID=6081497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18609/28A Expired GB293827A (en) | 1927-07-13 | 1928-06-27 | Improvements in electric incandescent lamps |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1726365A (en) |
| GB (1) | GB293827A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2459841A (en) * | 1943-06-08 | 1949-01-25 | Glenn F Rouse | Cathode |
| US2873376A (en) * | 1946-02-21 | 1959-02-10 | William M Brobeck | Ion producing mechanisms |
| US2468736A (en) * | 1946-06-13 | 1949-05-03 | Raytheon Mfg Co | Slotted cathode structure |
| US2666158A (en) * | 1951-07-12 | 1954-01-12 | Polaroid Corp | Electric projection lamp |
| ATE343850T1 (en) * | 1999-08-22 | 2006-11-15 | Ip2H Ag | LIGHT SOURCE WITH INDIRECTLY HEATED FILAMENT |
-
1928
- 1928-05-10 US US276791A patent/US1726365A/en not_active Expired - Lifetime
- 1928-06-27 GB GB18609/28A patent/GB293827A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1726365A (en) | 1929-08-27 |
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