US1023295A - Manufacture of metallic filaments for incandescent electric lamps. - Google Patents
Manufacture of metallic filaments for incandescent electric lamps. Download PDFInfo
- Publication number
- US1023295A US1023295A US47153309A US1909471533A US1023295A US 1023295 A US1023295 A US 1023295A US 47153309 A US47153309 A US 47153309A US 1909471533 A US1909471533 A US 1909471533A US 1023295 A US1023295 A US 1023295A
- Authority
- US
- United States
- Prior art keywords
- manufacture
- electric lamps
- metallic filaments
- incandescent electric
- filaments
- 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 - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title description 5
- 229920000297 Rayon Polymers 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000027455 binding Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- UYJXRRSPUVSSMN-UHFFFAOYSA-P ammonium sulfide Chemical compound [NH4+].[NH4+].[S-2] UYJXRRSPUVSSMN-UHFFFAOYSA-P 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/111—Fine ceramics
- C04B35/117—Composites
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/14—Solid thermionic cathodes characterised by the material
Definitions
- My invention relates to the manufacture of metallic filaments for incandescent electric lamps, and particularly to the production of a plastic paste or mass from which such filaments may be formed by the wellknown squirting process or in any' other approved manner.
- This mass is then ormed by squirting or otherwise into filaments which: are subsequently converted into metallic filaments by a suit able treatment, as by drying the filament in the open air and heating it in an atmosphere of hydrogen. This results in a carbonization of the filament, or rather of the binder it contains.
- This binder is decomposed by the heat, the ammonium sulfid escaping as a gas and the cellulose being burned or carbonized.
- This carbonizing step may be carried out in a porcelain tube heatedexternally by Bunsen burners, the air originally contained in such tube being driven out by a current of hydrogen passed therethrough.
- the quantity of carbon resulting from this treatment should be exactly or approximately suflicient to combine with the oxygen of the oxid, and the pro- Specification of Letters Patent.
- the advantages of the viscose binder are the smallness of the carbon residueleft by it, the small amount of it that sufiices for efficient binding action,the advantage of these two properties being of course, cumulative,and the relatively low temperature at which it decomposes.
- the ammonium solution has the advantage that the solvent leaves no residue of any sort.
- a squirting mixture for the formation of filaments comprising material held-in .
- a plastic paste for filament manufacture comprising finely divided tungsten held in a binder of ammonium viscose.
- a plastic mixture for the production of filaments comprising finely divided material held in a solution of viscose.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Artificial Filaments (AREA)
- Nonwoven Fabrics (AREA)
Description
1 rrnn srarns rarnnr canton.
' HARRY BRESLER, CHARLOTTENBURG, GERMANY, ASSIGNOR, BY MESNE-ASS IGN- MENTS, TO GENERAL ELECTRIC G(Y'IHCEIIEAN'Y, A CORPORATION OF NEW YORK.
subject of the Emperor of MANUFACTUREOF METALLIC FILAMENTS'FOR INCANDESCE-NT ELECTRIC LAMPS.
No Drawing.
To all whom it may concern:
Be it known that I, HARRY Bnnsunn, 2. Germany, and resident of Oharlottenburg, Germany, have invented certain new and useful Improvements in the'Manufactur of Metallic Filaments for Incandescent Electric Lamps, of which the following is a specification.
My invention relates to the manufacture of metallic filaments for incandescent electric lamps, and particularly to the production of a plastic paste or mass from which such filaments may be formed by the wellknown squirting process or in any' other approved manner.
In carrying out my present invention, I take a fine powder of a suitable metal, such as tungsten ormolybdenum, either alone or mixed with oxide of such metal, and by the addition of a small amount of binder consisting of a solution of ammonium viscose, I produce a lastic mass or paste. This mass is then ormed by squirting or otherwise into filaments which: are subsequently converted into metallic filaments by a suit able treatment, as by drying the filament in the open air and heating it in an atmosphere of hydrogen. This results in a carbonization of the filament, or rather of the binder it contains. This binder is decomposed by the heat, the ammonium sulfid escaping as a gas and the cellulose being burned or carbonized. This carbonizing step may be carried out in a porcelain tube heatedexternally by Bunsen burners, the air originally contained in such tube being driven out by a current of hydrogen passed therethrough. The quantity of carbon resulting from this treatment should be exactly or approximately suflicient to combine with the oxygen of the oxid, and the pro- Specification of Letters Patent.
Application filed January 9, 1909. Serial No. 471,533.
Patented Apr. 16, 1912'.
ment, but if there is any excess, it should be of oxid. Any remnant of oxid not decomposed by the. carbon, will be reduced by the action of the hydrogen current, so that 'a pure metallic filament is obtained. In order to give these filaments good electrical conductivity, they are then brought to red heat by an electric current either in a vacuum or in an atmosphere of nitrogen.
Among the advantages of the viscose binder are the smallness of the carbon residueleft by it, the small amount of it that sufiices for efficient binding action,the advantage of these two properties being of course, cumulative,and the relatively low temperature at which it decomposes. Besides-the lowcarbon content, efiicient binding action, and low temperature of decomposition characteristic of viscose itself, the ammonium solution has the advantage that the solvent leaves no residue of any sort.
I claim as 'my invention:
1. A squirting mixture for the formation of filaments comprising material held-in .a
binder of ammonium viscose.
2. A plastic paste for filament manufacture comprising finely divided tungsten held in a binder of ammonium viscose.-
3. A plastic mixture for the production of filaments comprising finely divided material held in a solution of viscose.
In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses. HARRY BRESLER.
Witnesses:
JOHN Lorna, JOHN A. KEHLENBECK.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US47153309A US1023295A (en) | 1909-01-09 | 1909-01-09 | Manufacture of metallic filaments for incandescent electric lamps. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US47153309A US1023295A (en) | 1909-01-09 | 1909-01-09 | Manufacture of metallic filaments for incandescent electric lamps. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1023295A true US1023295A (en) | 1912-04-16 |
Family
ID=3091592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US47153309A Expired - Lifetime US1023295A (en) | 1909-01-09 | 1909-01-09 | Manufacture of metallic filaments for incandescent electric lamps. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1023295A (en) |
-
1909
- 1909-01-09 US US47153309A patent/US1023295A/en not_active Expired - Lifetime
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