DE235666C - - Google Patents
Info
- Publication number
- DE235666C DE235666C DENDAT235666D DE235666DA DE235666C DE 235666 C DE235666 C DE 235666C DE NDAT235666 D DENDAT235666 D DE NDAT235666D DE 235666D A DE235666D A DE 235666DA DE 235666 C DE235666 C DE 235666C
- Authority
- DE
- Germany
- Prior art keywords
- threads
- fine
- metal
- thread
- binder
- 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.)
- Active
Links
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 2
- 239000000126 substance Substances 0.000 claims 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- SQGYOTSLMSWVJD-UHFFFAOYSA-N Silver nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 239000003929 acidic solution Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012255 powdered metal Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001681 protective Effects 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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)
- Powder Metallurgy (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
PATENTSCHRIFTPATENT LETTERING
- JKi 235666 — KLASSE 21/. GRUPPE - JKi 235666 - CLASS 21 /. GROUP
Bei der Herstellung elektrischer Metallglühfäden, die aus fein gepulverten Metallen mit einem Bindemittel·1 zu einer knetbaren Paste verarbeitet werden und, durch feine Düsen gepreßt, als feine Fäden erhalten werden, wird es als, Nachteil empfunden, daß. derartig erhaltene Fäden, um sie elektrisch leitfähig zu machen, erst unter Luftabschluß oder in einer indifferenten Atmosphäre geglüht werden müssen.In the production of electrical metal filaments which are made into a kneadable paste from finely powdered metals with a binder x 1 and obtained as fine threads when pressed through fine nozzles, it is felt to be a disadvantage that. threads obtained in this way, in order to make them electrically conductive, first have to be annealed in the absence of air or in an inert atmosphere.
Nach dem von mir erdachten Verfahren ist nun dieses Vorbrennen durch Vermuffeln der Fäden und Glühen unter Luftabschluß nicht nötig, sondern die durch Pressen erhaltenen Fäden werden vor dem Einhängen in einen zur. Fertigstellung' dienenden Rezipienten einfach durch eine frei brennende Flamme gezogen, wodurch der Faden ohne weiteres und ohne Oxydation oder Verbrennung des feinen, z. B. Wolframpulvers, leit-. fähig wird.According to the method I devised, this pre-burning is now through muffling the threads and annealing in the absence of air are not necessary, but those obtained by pressing Threads are tied into a. Completion 'serving recipients simply drawn through a free-burning flame, causing the thread to be readily and without oxidation or burning of the fine, z. B. tungsten powder, conductive. becomes capable.
Diese eigenartige Erscheinung! wijrd (dadurch ermöglicht, daß dem Faden Silbermetall in feinster Fällung zugesetzt wird. Am zweckmäßigsten ist es, das Wolframmetall in eine Lösung von Silbernitrat (AG NO3) zu schütten, wodurch momentan Silber ausgefällt wird, welches die Wolframatome mit einem schützenden Silberüberzug versieht. Nach dem Abgießen der sauren Lösung und Auswaschen mit Wasser ist das Metall zum Verarbeiten fertig und widersteht jetzt der Oxydation beim Durchziehen durch eine offene Flamme.This strange appearance! wijrd (made possible by adding very fine precipitated silver metal to the thread. It is most expedient to pour the tungsten metal into a solution of silver nitrate (AG NO 3 ) , which momentarily precipitates silver, which provides the tungsten atoms with a protective silver coating. After the acidic solution has been poured off and washed out with water, the metal is ready for processing and now resists oxidation when drawn through an open flame.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE235666C true DE235666C (en) |
Family
ID=495413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT235666D Active DE235666C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE235666C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4587775A (en) * | 1984-07-18 | 1986-05-13 | Earl & Wright | Retractable closure for roof opening |
-
0
- DE DENDAT235666D patent/DE235666C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4587775A (en) * | 1984-07-18 | 1986-05-13 | Earl & Wright | Retractable closure for roof opening |
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