US492150A - edison - Google Patents
edison Download PDFInfo
- Publication number
- US492150A US492150A US492150DA US492150A US 492150 A US492150 A US 492150A US 492150D A US492150D A US 492150DA US 492150 A US492150 A US 492150A
- Authority
- US
- United States
- Prior art keywords
- filament
- tube
- edison
- coating
- oxide
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 16
- 229910052799 carbon Inorganic materials 0.000 description 16
- 239000011248 coating agent Substances 0.000 description 14
- 238000000576 coating method Methods 0.000 description 14
- 239000004020 conductor Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 12
- 239000011521 glass Substances 0.000 description 10
- 239000011810 insulating material Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 230000003068 static Effects 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000015450 Tilia cordata Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/005—Continuous casting of metals, i.e. casting in indefinite lengths of wire
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Glass Compositions (AREA)
- Resistance Heating (AREA)
- Paints Or Removers (AREA)
Description
(No Model.)
T. A. EDISON. PROCESS OF COATING OONDUOTORS FOR INGANDESGENT LAMPS.
No. 492,150. Patented Feb. 21, 1893.
T T: I V INVENTOR:.
ATENT OFFICE.
THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY, ASSIGNOR TO THE EDISON ELECTRIC LIGHT COMPANY, OF NEW YORK, N. Y.
PROCESS OF COATlNG CONDUCTORS FOR INCANDESCENI LAMPS.
SPECIFICATION formingpart of Letters Patent No. 492,150, dated February 21, 1893.
Application filed October 26, 1882. Serial No. 75,204. (No specimens.)
To all whom it may concern:
Be it known that I, THOMAS A. EDISON, of Menlo Park, in the county of Middlesex and State of New Jersey, have invented a new and useful Improvementin Processes of Coating Conductors for Incandescent Lamps, (Case No. 503,) of which the following is a specification.
The object of my invention is to prevent the electrical carrying which occurs in incandescing electric lamps; that is, the transferring by static attraction, of highly electrified particles of carbon from the incandescing filament to the oppositely-charged glass of the inclosing globe.
To this end my invention consists in the process of covering the flexible carbon filament of an incandescing electric lamp with a coating of insulating material not decomposable by carbon, and fusible at the highest temperatures only. For this purpose I prefer to use one of the earthy oxides, such as lime, magnesia, or zirconia, I having discovered that such oxides cannot be decomposed by carbon except in the presence of watery vapor which of course does not occur in 'the vacuum chambers of incandescing electric lamps; but boron, silicon or like elements may be used, these being sufficiently good insulators or bad conductors for the purpose, or any element or compound which possesses the properties mentioned. The effect of this coating of the filament is that the static attraction will draw over particles of the oxide or other material instead of particles of carbon. The insulation will become incandescent from its contact with the heated filament, and the light will therefore not be lessened.
I have devised several different processes which may be advantageously employed for covering the filament with a durable and continuous coating of insulation. By one method, the filament which in this case is preferably straight, is placed in a glass tube with platinum wires connected to its ends,
such wires being sealed in the glass of the tube. The tube is then filled with an oxide such as those named above, in a finely divided condition, and packed closely around the filament. Means are provided fol-producing a vacuum in the tube, and during the ex- The filament so coated, is placed in the lamp globe and the latter is exhausted and sealed off in the usual manner.
Instead of exhausting the tube WhlGhOOlltains the oxide it may be filled with nitrogen or other nearly inert gas the same eifect being produced.
In the case where the tube is exhausted,
said tube may be heated in a flame so that the glass is softened and the tube will c011- tract under the pressure of the atmosphere upon the oxide, pressing it closely against the filament. The whole may then be placed in the inclosing lamp-globe.
The process described is illustrated in the drawing, wherein a is the flexible carbon filament having wires b I) attached to its ends and sealed in the glass of the tube A. Within the tube A is packed the finely divided oxide 0. A tube at is used to connect the tube A with an exhausting apparatus.
What I claim is 1. The process-of coating a flexible carbon filament designed for the incandescing conductor of an electric lamp, with insulating material, consisting in heating said filament while in a mass of such material, thereby fusing a layer of such material to said filament, substantially as set forth.
2. The process of coating a flexible carbon filament, designed for the ineandescing conductor of an electric lamp, with insulating material consisting in embedding such conductor in an insulating oxide 01' compound in a suitable receptacle, exhausting air therefrom, and finally passing a current through said filament sufficient to fuse a coating of such oxide onto the filament, substantially as set forth.
This specification signed and witnessed this 19th day of October, 1889.
TI'IOS. A. EDISON.
itnesses:
II. W. SEELY, EDWARD 1T. PYATT.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US492150A true US492150A (en) | 1893-02-21 |
Family
ID=2560994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US492150D Expired - Lifetime US492150A (en) | edison |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US492150A (en) |
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0
- US US492150D patent/US492150A/en not_active Expired - Lifetime
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