GB2018744A - Pitch sealing - Google Patents
Pitch sealingInfo
- Publication number
- GB2018744A GB2018744A GB7907700A GB7907700A GB2018744A GB 2018744 A GB2018744 A GB 2018744A GB 7907700 A GB7907700 A GB 7907700A GB 7907700 A GB7907700 A GB 7907700A GB 2018744 A GB2018744 A GB 2018744A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conductors
- sealing
- bulb
- glass
- annealed
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/04—Joining glass to metal by means of an interlayer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/38—Seals for leading-in conductors
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
- Joining Of Glass To Other Materials (AREA)
Abstract
The invention relates to the manufacture of an incandescent lamp provided with a hard glass bulb. In contrast to the methods applied up to now, the preceding operation of glazing the current lead-ins is obviated by oxidising the conductors during pinch-sealing; furthermore, after sealing-in a controlled heat treatment is applied. The heat treatment is preferably performed in a two-zone annealing equipment: in the upper zone the bulb is annealed, while in the lower one the conductors are annealed. This enables the bulb and the conductors to be cooled at different rates. By using the invention for a given matching of the glass and the conductors, the stress conditions needed for sealing-in may be obtained even where there is a considerable difference in the coefficients of thermal expansion of the glass and the conductors. <IMAGE>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HUEE002552 HU177818B (en) | 1978-03-06 | 1978-03-06 | Method for making incandescent lamp of hard glass bulb and lamp support and incandescent lamp or lamp support made according to this method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2018744A true GB2018744A (en) | 1979-10-24 |
| GB2018744B GB2018744B (en) | 1982-08-04 |
Family
ID=10995761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7907700A Expired GB2018744B (en) | 1978-03-06 | 1979-03-05 | Pinch sealing |
Country Status (4)
| Country | Link |
|---|---|
| AT (1) | AT367570B (en) |
| DE (1) | DE2905970A1 (en) |
| GB (1) | GB2018744B (en) |
| HU (1) | HU177818B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005047006A1 (en) * | 2005-09-30 | 2007-04-05 | Schott Ag | Composite system, method for producing a composite system and luminous bodies |
-
1978
- 1978-03-06 HU HUEE002552 patent/HU177818B/en unknown
-
1979
- 1979-02-08 AT AT96279A patent/AT367570B/en not_active IP Right Cessation
- 1979-02-13 DE DE19792905970 patent/DE2905970A1/en not_active Withdrawn
- 1979-03-05 GB GB7907700A patent/GB2018744B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2905970A1 (en) | 1979-09-13 |
| ATA96279A (en) | 1981-11-15 |
| GB2018744B (en) | 1982-08-04 |
| HU177818B (en) | 1981-12-28 |
| AT367570B (en) | 1982-07-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |