GB983465A - A microminiature electric incandescent lamp - Google Patents
A microminiature electric incandescent lampInfo
- Publication number
- GB983465A GB983465A GB2119862A GB2119862A GB983465A GB 983465 A GB983465 A GB 983465A GB 2119862 A GB2119862 A GB 2119862A GB 2119862 A GB2119862 A GB 2119862A GB 983465 A GB983465 A GB 983465A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filament
- wires
- tube
- wire
- leading
- 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
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C331/00—Derivatives of thiocyanic acid or of isothiocyanic acid
- C07C331/16—Isothiocyanates
- C07C331/32—Isothiocyanates having isothiocyanate groups acylated
-
- 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
- H01K3/02—Manufacture of incandescent bodies
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
983,465. Electric incandescent lamps. PATENT-TREUHAND - GES. FUR ELEKTRISCHE GLUHLAMPEN. June 1, 1962 [June 2, 1961], No. 21198/62. Heading H1F. A very small incandescent lamp, e.g. having a tubular envelope of about 0.6 mm. diameter and a filament the diameter of which is less than 10 microns, has a single wire of high melting point metal, e.g. tungsten, constituting both the filament and the leading-in wires, the portion serving as the filament having a smaller cross-sectional area than that forming the leading-in wires. The difference may be produced by etching away part of a uniform wire of the cross-section required for the leading-in wires to produce a filament wire of smaller cross-section or by starting with a wire of cross-section appropriate to the filament and producing thickened portions for the lead-in wires by electrodeposition. The deposited metal may be tungsten or another metal such as gold or copper. The lead-in portions 3 may be fixed into a glass bead 7 and inserted in a tube 4 closed at one end. After evacuation, the tube is sealed to the bead. To ensure accuracy in the finished length of the lamp, the glass tube may be relatively long and is sealed at the open end after evacuation. The tube can then be sealed off at the required part, the end with the initial closure being removed. Specification 659,992 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP27265A DE1185719B (en) | 1961-06-02 | 1961-06-02 | Small electric incandescent lamp and process for its manufacture |
Publications (1)
Publication Number | Publication Date |
---|---|
GB983465A true GB983465A (en) | 1965-02-17 |
Family
ID=7370753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2119862A Expired GB983465A (en) | 1961-06-02 | 1962-06-01 | A microminiature electric incandescent lamp |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE618388A (en) |
CH (1) | CH401260A (en) |
DE (1) | DE1185719B (en) |
GB (1) | GB983465A (en) |
NL (1) | NL278169A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2139417A (en) * | 1983-03-03 | 1984-11-07 | Philips Nv | Halogen incandescent lamp |
WO2005078230A1 (en) | 2004-02-07 | 2005-08-25 | Sandpiper Construction Limited | Ladder stabiliser |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5659222A (en) * | 1996-02-27 | 1997-08-19 | Illumination Technology, Inc. | Vacuum sealed incandescent lamp with improved filament support structure |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE143107C (en) * | ||||
DE432876C (en) * | 1925-05-16 | 1926-08-16 | Patra Patent Treuhand | Process for the production of very fine tungsten wires, especially for electric light bulbs |
BE542806A (en) * | 1954-11-16 |
-
0
- NL NL278169D patent/NL278169A/xx unknown
-
1961
- 1961-06-02 DE DEP27265A patent/DE1185719B/en active Pending
-
1962
- 1962-05-16 CH CH592762A patent/CH401260A/en unknown
- 1962-06-01 BE BE618388A patent/BE618388A/en unknown
- 1962-06-01 GB GB2119862A patent/GB983465A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2139417A (en) * | 1983-03-03 | 1984-11-07 | Philips Nv | Halogen incandescent lamp |
WO2005078230A1 (en) | 2004-02-07 | 2005-08-25 | Sandpiper Construction Limited | Ladder stabiliser |
Also Published As
Publication number | Publication date |
---|---|
DE1185719B (en) | 1965-01-21 |
BE618388A (en) | 1962-10-01 |
NL278169A (en) | |
CH401260A (en) | 1965-10-31 |
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