GB823695A - Improvements in or relating to a method of retaining part of the core-wire material within a filament helix wound around the core - Google Patents
Improvements in or relating to a method of retaining part of the core-wire material within a filament helix wound around the coreInfo
- Publication number
- GB823695A GB823695A GB32195/55A GB3219555A GB823695A GB 823695 A GB823695 A GB 823695A GB 32195/55 A GB32195/55 A GB 32195/55A GB 3219555 A GB3219555 A GB 3219555A GB 823695 A GB823695 A GB 823695A
- Authority
- GB
- United Kingdom
- Prior art keywords
- core
- filament
- parts
- wax layer
- nov
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
- H01K3/02—Manufacture of incandescent bodies
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Toys (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
823,695. Making electric lamp filaments. PHILIPS ELECTRICAL INDUSTRIES Ltd. Nov. 10, 1955 [Nov. 13, 1954], No. 32195/55. Class 39(2) [Also in Group XVI] In order that the process of removing by etching the unwanted parts of a core upon which a wire filament is helically wound shall result in substantially flat end surfaces 8, 9 upon a retained core piece 7 of the required overall length, at least the parts E-C and D-F of the filament and core immediately adjacent to the core piece 7 are, before the application of a wax layer upon the part 7 and the portion of the filament wound upon it, treated with a substance capable of increasing the surface tension of the wax. The parts E-C and D-F may be painted with a brush moistened by partly hydrolised ethyl silicate, or the complete filament with the core may be immersed in a bath of that substance, after which a wax layer is applied to the part C-D and the unwanted core material etched away and the wax layer subsequently removed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL341904X | 1954-11-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB823695A true GB823695A (en) | 1959-11-18 |
Family
ID=19784731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32195/55A Expired GB823695A (en) | 1954-11-13 | 1955-11-10 | Improvements in or relating to a method of retaining part of the core-wire material within a filament helix wound around the core |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE542730A (en) |
| CH (1) | CH341904A (en) |
| DE (1) | DE1003858B (en) |
| FR (1) | FR1140876A (en) |
| GB (1) | GB823695A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4812600B1 (en) * | 1969-07-10 | 1973-04-21 | ||
| US5270609A (en) * | 1991-12-11 | 1993-12-14 | U.S. Philips Corporation | Incandescent lamp having improved filament support structure |
-
0
- BE BE542730D patent/BE542730A/xx unknown
-
1955
- 1955-11-09 DE DEN11540A patent/DE1003858B/en active Pending
- 1955-11-10 FR FR1140876D patent/FR1140876A/en not_active Expired
- 1955-11-10 GB GB32195/55A patent/GB823695A/en not_active Expired
- 1955-11-11 CH CH341904D patent/CH341904A/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4812600B1 (en) * | 1969-07-10 | 1973-04-21 | ||
| US5270609A (en) * | 1991-12-11 | 1993-12-14 | U.S. Philips Corporation | Incandescent lamp having improved filament support structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CH341904A (en) | 1959-10-31 |
| DE1003858B (en) | 1957-03-07 |
| BE542730A (en) | |
| FR1140876A (en) | 1957-08-20 |
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