DE457177C - Electric incandescent lamp with tungsten filament - Google Patents
Electric incandescent lamp with tungsten filamentInfo
- Publication number
- DE457177C DE457177C DEP54804D DEP0054804D DE457177C DE 457177 C DE457177 C DE 457177C DE P54804 D DEP54804 D DE P54804D DE P0054804 D DEP0054804 D DE P0054804D DE 457177 C DE457177 C DE 457177C
- Authority
- DE
- Germany
- Prior art keywords
- holder
- chrome
- tungsten filament
- tungsten
- coating
- 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
- H01K1/00—Details
- H01K1/18—Mountings or supports for the incandescent body
- H01K1/20—Mountings or supports for the incandescent body characterised by the material thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12389—All metal or with adjacent metals having variation in thickness
- Y10T428/12396—Discontinuous surface component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
- Y10T428/12826—Group VIB metal-base component
- Y10T428/12833—Alternative to or next to each other
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
- Y10T428/12826—Group VIB metal-base component
- Y10T428/12847—Cr-base component
Landscapes
- Resistance Heating (AREA)
Description
DEUTSCHES REICHGERMAN EMPIRE
AUSGEGEBEN AM 9. MÄRZ 1928ISSUED ON MARCH 9, 1928
REICHSPATENTAMTREICH PATENT OFFICE
PATENTSCHRIFTPATENT LETTERING
KLASSE 21 f GRUPPECLASS 21 f GROUP
Patentiert im Deutschen Reiche vom 9. März 1927 ab.Patented in the German Empire on March 9, 1927.
Es ist bereits vorgeschlagen worden, bei elektrischen Glühlampen mit Wolframleuchtkörpern die aus Molybdän oder Wolfram bestehenden Halter mit einem Chromüberzug zu versehen. Letzterer wirkt nämlich schon bei niedrigerer Temperatur als Molybdän oder Wolfram auf etwa in der Lampe anwesenden Wasserdampf zerlegend ein, so- daß dieser nicht oder nur in geringerem Maße den Leuchtkörper beeinflussen kann. Diese bekannten Chromüberzüge bedecken den ganzen Halter.It has already been proposed for electric incandescent lamps with tungsten filaments to provide the holder made of molybdenum or tungsten with a chrome coating. The latter works even at a lower temperature than molybdenum or tungsten on about those present in the lamp Decomposing water vapor, so that it does not or only to a lesser extent the Can affect luminous bodies. These well-known chrome coatings cover the whole Holder.
Erfindungsgemäß erstreckt sich dagegen dieser den Molybdän- oder Wolframhalter bedeckende Überzug nur bis in die Nähe der Halterungsstelle des Wolframleuchtkörpers, so daß also die dem letzteren benachbarten äußeren Enden der Halter bzw. die an diesen angebrachten Häkchen oder Ösen frei vom Chromüberzug sind. Durch diese Ausbildung des an sich bekannten Chromüberzuges wird erreicht, daß im Betriebe der Lampe keine die Lebensdauer der letzteren beeinträchtigende schädliche Legierungsbildung zwischen dem glühenden Wolframleuchtkörper und dem Chromüberzug der Halter eintreten kann. Da auch die nicht unmittelbar vom Leuchtkörper berührten bzw. diesem nicht unmittelbar benachbarten Teile der Halter im Betriebe der Lampe noch durch Wärmeleitung genügend heiß werden, so ist auch in diesem Falle die günstige Wirkung des Chromüberzuges auf etwa anwesenden Wasserdampf in der Lampe sichergestellt.According to the invention, however, this extends the molybdenum or tungsten holder covering Coating only up to the vicinity of the mounting point of the tungsten filament, so that the latter is adjacent outer ends of the holder or the hooks or eyelets attached to them free from Chrome plating are. This design of the known chrome coating it is achieved that, in the operation of the lamp, there is no impairment of the service life of the latter harmful alloy formation can occur between the glowing tungsten filament and the chrome coating of the holder can. Since also those not directly touched by the luminous element or this not immediately adjacent parts of the holder in the operation of the lamp nor through If heat conduction becomes sufficiently hot, this is also the beneficial effect in this case of the chrome coating on any water vapor present in the lamp.
Zwecks Herstellung der neuen Halter werden zweckmäßig gewöhnliche Halter aus Molybdän oder Wolfram vorerst in ihrer ganzen Länge mit einem Überzug aus Chrom, etwa durch elektrolytische Einwirkung, versehen. Diese Halter werden darauf in üblicher Weise in der Glasstütze des Traggestelles eingeschmolzen. Vor dem Festlegen des Wolframleuchtkörpers an den Haltern werden die in üblicher Weise mit Häkchen oder ösen versehenen äußeren Enden der Halter erfindungsgemäß vom Chromüberzug befreit, etwa dadurch, daß eine Gebläseflamme für einige Sekunden auf die äußeren, freizumachenden Enden der Halter gerichtet wird, bis der Chromüberzug dieser Halterstellen verdampft ist.For the purpose of producing the new holders, it is useful to use ordinary molybdenum holders or tungsten initially provided with a coating of chromium over its entire length, for example by electrolytic action. These holders are then melted in the usual way in the glass support of the support frame. Before the tungsten filament is fixed to the holders, they are ticked or loosened in the usual way provided outer ends of the holder according to the invention freed from the chrome coating, for example in that a fan flame for a few seconds on the outer, to be cleared Ends of the holder is straightened until the chrome coating of these holder points evaporates is.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB12442/26A GB275735A (en) | 1926-05-14 | 1926-05-14 | Improvements in electric incandescent lamps |
Publications (1)
Publication Number | Publication Date |
---|---|
DE457177C true DE457177C (en) | 1928-03-09 |
Family
ID=10004668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP54804D Expired DE457177C (en) | 1926-05-14 | 1927-03-09 | Electric incandescent lamp with tungsten filament |
Country Status (4)
Country | Link |
---|---|
US (1) | US1733076A (en) |
DE (1) | DE457177C (en) |
FR (1) | FR631452A (en) |
GB (1) | GB275735A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3529335A (en) * | 1966-05-06 | 1970-09-22 | Pinlites Inc | Method of making a light bulb with a plurality of independently connected filaments for indicating graphic symbols |
-
1926
- 1926-05-14 GB GB12442/26A patent/GB275735A/en not_active Expired
-
1927
- 1927-03-09 DE DEP54804D patent/DE457177C/en not_active Expired
- 1927-03-26 FR FR631452D patent/FR631452A/en not_active Expired
- 1927-04-25 US US186488A patent/US1733076A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB275735A (en) | 1927-08-15 |
US1733076A (en) | 1929-10-22 |
FR631452A (en) | 1927-12-21 |
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