GB1207221A - Improvements in or relating to the manufacture of pinch seals in vitreous envelopes - Google Patents
Improvements in or relating to the manufacture of pinch seals in vitreous envelopesInfo
- Publication number
- GB1207221A GB1207221A GB500868A GB500868A GB1207221A GB 1207221 A GB1207221 A GB 1207221A GB 500868 A GB500868 A GB 500868A GB 500868 A GB500868 A GB 500868A GB 1207221 A GB1207221 A GB 1207221A
- Authority
- GB
- United Kingdom
- Prior art keywords
- foil
- conductor
- pinch
- glass
- vitreous
- 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
-
- 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
- C03C27/042—Joining glass to metal by means of an interlayer consisting of a combination of materials selected from glass, glass-ceramic or ceramic material with metals, metal oxides or metal salts
- C03C27/044—Joining glass to metal by means of an interlayer consisting of a combination of materials selected from glass, glass-ceramic or ceramic material with metals, metal oxides or metal salts of glass, glass-ceramic or ceramic material only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
- H01J61/366—Seals for leading-in conductors
- H01J61/368—Pinched seals or analogous seals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/32—Sealing leading-in conductors
- H01J9/323—Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device
- H01J9/326—Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device making pinched-stem or analogous seals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/38—Seals for leading-in conductors
-
- 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
- H01K3/20—Sealing-in wires directly into the envelope
Abstract
1,207,221. Pinch seals in vitreous envelopes. GENERAL ELECTRIC and ENGLISH ELECTRIC COMPANIES Ltd. 28 Jan., 1969 [31 Jan., 1968], No. 5008/68. Heading C1M. A molybdenum foil pinch seal is made by joining one end of a strip of Mo foil to a conductor (the outer conductor), cleaning the surfaces of at least the mutually adjacent end portions of foil and conductor to remove any oxide film, forming a coating of an aluminoboro-silicate glass on the cleaned surfaces, the glass having a coefficient of thermal expansion closely matching that of the vitreous material which is to form the pinch, and heating to form a glaze, simultaneously or subsequently pinching a tube of fused SiO 2 or high SiO 2 - content glass (i.e. at least 90 wt. per cent of SiO 2 ) over the foil/conductor assembly at an elevated temperature (e.g. 2000‹ C.) so that the glazed portions are embedded in the pinch. The other end of the foil may be connected to an inner conductor, either before or after glazing the foil. The inner and outer conductors may be of Mo or W. Suitable glasses for the glaze and for the vitreous pinch material are given. The glass may be applied by applying glass powder of particle size not more than 10 microns to the foil and conductor, and heating at, preferably, above 1200‹ C. to fuse the glass. Preferably a non-oxidizing, e.g. hydrogen, atmosphere is used. The powder is preferably applied in a suspension in a hydroxylcontaining liquid, e.g. H 2 O, MeOH, at pH about 2 so as to form a coating not thicker than 1/1000 of an inch. The pinch seals formed may be formed in producing an incandescent lamp or an electric discharge tube, for example. The Mo foil and conductor may be cleaned by electrolysis in an alkaline solution (e.g. 30% w/v NaOH solution) followed by washing in distilled water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB500868A GB1207221A (en) | 1968-01-31 | 1968-01-31 | Improvements in or relating to the manufacture of pinch seals in vitreous envelopes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB500868A GB1207221A (en) | 1968-01-31 | 1968-01-31 | Improvements in or relating to the manufacture of pinch seals in vitreous envelopes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1207221A true GB1207221A (en) | 1970-09-30 |
Family
ID=9788011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB500868A Expired GB1207221A (en) | 1968-01-31 | 1968-01-31 | Improvements in or relating to the manufacture of pinch seals in vitreous envelopes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1207221A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0818805A2 (en) * | 1996-07-12 | 1998-01-14 | Koito Manufacturing Co., Ltd | Discharge lamp ARC tube and method of producing the same |
| EP1563524A2 (en) * | 2002-11-07 | 2005-08-17 | Advanced Lighting Technologies, Inc. | Oxidation-protected metallic foil in methods |
| US8277274B2 (en) | 2002-11-07 | 2012-10-02 | Advanced Lighting Technologies, Inc. | Apparatus and methods for use of refractory abhesives in protection of metallic foils and leads |
| DE10241398B4 (en) * | 2001-09-07 | 2013-06-13 | Koito Manufacturing Co., Ltd. | Method for producing an arc tube for a discharge lamp |
-
1968
- 1968-01-31 GB GB500868A patent/GB1207221A/en not_active Expired
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0818805A2 (en) * | 1996-07-12 | 1998-01-14 | Koito Manufacturing Co., Ltd | Discharge lamp ARC tube and method of producing the same |
| EP0818805A3 (en) * | 1996-07-12 | 1998-03-25 | Koito Manufacturing Co., Ltd | Discharge lamp ARC tube and method of producing the same |
| US5877590A (en) * | 1996-07-12 | 1999-03-02 | Koito Manufacturing Co., Ltd. | Discharge lamp arc tube and method of producing the same |
| US5993279A (en) * | 1996-07-12 | 1999-11-30 | Koito Manufacturing Co., Ltd. | Discharge lamp arc tube and method of producing the same |
| DE10241398B4 (en) * | 2001-09-07 | 2013-06-13 | Koito Manufacturing Co., Ltd. | Method for producing an arc tube for a discharge lamp |
| EP1563524A2 (en) * | 2002-11-07 | 2005-08-17 | Advanced Lighting Technologies, Inc. | Oxidation-protected metallic foil in methods |
| EP1563524A4 (en) * | 2002-11-07 | 2008-12-10 | Advanced Lighting Tech Inc | Oxidation-protected metallic foil in methods |
| US8264147B2 (en) | 2002-11-07 | 2012-09-11 | Advanced Lighting Technologies, Inc. | Oxidation-protected metallic foil and methods |
| US8277274B2 (en) | 2002-11-07 | 2012-10-02 | Advanced Lighting Technologies, Inc. | Apparatus and methods for use of refractory abhesives in protection of metallic foils and leads |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |