US370124A - Manufacture of filaments for incandescing electric lights - Google Patents
Manufacture of filaments for incandescing electric lights Download PDFInfo
- Publication number
- US370124A US370124A US370124DA US370124A US 370124 A US370124 A US 370124A US 370124D A US370124D A US 370124DA US 370124 A US370124 A US 370124A
- Authority
- US
- United States
- Prior art keywords
- filaments
- filament
- manufacture
- electric lights
- incandescing
- 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 6
- 239000000463 material Substances 0.000 description 18
- 239000004020 conductor Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000010000 carbonizing Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000007598 dipping method Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0869—Acids or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
Definitions
- the object of this invention is to produce efficient and durable incandescing conductors for electric lamps, said invention consisting in a process of manufacturing carbon filaments to be used for this purpose.
- the filament of suitable material is first carbonized, then placed in a temporary vacuum-chamber and heated to high incandescence. It is then dipped in a solution of carbonizable material,dried and recarbonized, and is then ready for use.
- the filament is carbonized by heat in a closed flask or chamber, and under strain or pressure, or both. It is then placed in a receiver and connected in an electric circuit.
- the receiver is exhausted of air, the current is applied, and the filament is heated to a degree of incandescence higher than that at which it is intended to be permanently used. This sets the filament in its bentshape and renders it flexible and elastic. It is removed from this temporary receiver and dipped in a solution of sugar or other carbonizable material, with which it becomes impregnated, and any defective spots are filled with this carbonizable material.
- the filament is then recarbonized, preferably in a furnace, as before, the whole becoming a homogeneous structure. This is attached to wires and placedin the lamp globe, which is exhausted and sealed off in the usual manner. Instead of recarbonizing in a furnace, however, the filament may be placed in the lamp, said lamp exhausted, and the recarbonization accomplished by an electric current in vacuo.
- ⁇ Vhat I- claim is- 1.
- the process of making an incandescent conductor for electric lamps consisting in first carbonizing a filament of suitable material, then heating said filament to incandescence in a vacuum, then dipping said filament into a solution of carbonizalole material, and then carbonizing the whole, substantially as set forth.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Resistance Heating (AREA)
Description
UNITED STATES PATENT OFFICE.
THOMAS A. EDISON, OF MENLO PARK, NENV JERSEY.
MANUFACTURE OF FILAMENTS FOR INCANDESCING ELECTRIC LIGHTS.
SPECIFICATION forming part of Letters Patent. No. 370,124, dated September 20, 1887.
(No specimens.)
' To all whom it; may concern.-
Be it known that I, THoMAs A. EDIsoN, of Uenlo Park, in the county of Middlesex and State of New Jersey, have invented a new and useful Improvement in the Manufacture of In candescing Conductors for Electric Lamps, (Case No. 561,) of which the following is a specification.
The object of this invention is to produce efficient and durable incandescing conductors for electric lamps, said invention consisting in a process of manufacturing carbon filaments to be used for this purpose.
This process may be generally described as follows: The filament of suitable material is first carbonized, then placed in a temporary vacuum-chamber and heated to high incandescence. It is then dipped in a solution of carbonizable material,dried and recarbonized, and is then ready for use. I prefer to employ filaments of natural vegetable fibrous material-- such as bamboo-though I may employ paper or thread, and any of these materials may be parchmentized before carbonization, if desired. The filament is carbonized by heat in a closed flask or chamber, and under strain or pressure, or both. It is then placed in a receiver and connected in an electric circuit. The receiver is exhausted of air, the current is applied, and the filament is heated to a degree of incandescence higher than that at which it is intended to be permanently used. This sets the filament in its bentshape and renders it flexible and elastic. It is removed from this temporary receiver and dipped in a solution of sugar or other carbonizable material, with which it becomes impregnated, and any defective spots are filled with this carbonizable material. The filament is then recarbonized, preferably in a furnace, as before, the whole becoming a homogeneous structure. This is attached to wires and placedin the lamp globe, which is exhausted and sealed off in the usual manner. Instead of recarbonizing in a furnace, however, the filament may be placed in the lamp, said lamp exhausted, and the recarbonization accomplished by an electric current in vacuo.
\Vhat I- claim is- 1. The process of making an incandescent conductor for electric lamps, consisting in first carbonizing a filament of suitable material, then heating said filament to incandescence in a vacuum, then dipping said filament into a solution of carbonizalole material, and then carbonizing the whole, substantially as set forth.
2. The process ofmaking an incandescent conductor for electric lamps, consisting in first carbonizing a filament of suitable material, then heating said filament to incandescence in a vacuum, then dipping said filament into a solution of carbonizable material, and then recarbonizing by electrical heating in a vacuum, substantially as set forth.
This specification signed and witnessed this 12th day of April, 1883.
THOS. A. EDISON.
\Vitnesses:
H. W. SEELY, EDWARD I-I. lva'rr.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US370124A true US370124A (en) | 1887-09-20 |
Family
ID=2439138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US370124D Expired - Lifetime US370124A (en) | Manufacture of filaments for incandescing electric lights |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US370124A (en) |
-
0
- US US370124D patent/US370124A/en not_active Expired - Lifetime
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