US438299A - Thomas a - Google Patents
Thomas a Download PDFInfo
- Publication number
- US438299A US438299A US438299DA US438299A US 438299 A US438299 A US 438299A US 438299D A US438299D A US 438299DA US 438299 A US438299 A US 438299A
- Authority
- US
- United States
- Prior art keywords
- flask
- substance
- filaments
- gas
- carbonizing
- 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
- 239000000126 substance Substances 0.000 description 16
- 239000007789 gas Substances 0.000 description 12
- 238000010000 carbonizing Methods 0.000 description 10
- 238000003763 carbonization Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
- D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
- D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
- D01F9/20—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products
- D01F9/21—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F9/22—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyacrylonitriles
Definitions
- My invention relates to the process of carbonizing filaments for the incandescing conductors of electric lamps. I have found that the higher the temperature to which such filaments are raised before decomposition commences the more complete will be the carbonization and the more compact and homo geneous will be the residual carbon remaining after the process. By placing the filaments during carbonization under a higher than atmospheric pressure the temperature necessary for decomposition is raised to a point higher than the normal one. To accomplish this result, I place the filaments in a closed flask, in which is placed a quantity of hydrocarbon or of any other substance, which when heated gives off a gas or vapor other than oxygen-that is, one which will not injure the filaments during carbonization.
- the gas or vapor given off by this substance increases the pressure in the flask to the desired point.
- A is an outer flask, and B an inner one, both being made of a materialsuch as carbon or nickel-capable of withstanding high temperature. Each is provided with a tightlysecured cover.
- the molds a a Within the inner flask B are placed the molds a a, containing the filaments to be carbonized. The whole is placed in a suitable furnace, the outer flask A being of such height that its upper part projects well above the fire.
- ⁇ Vhat I claim is 1. The method of carbonizing, consisting in heating the carbonizable material in the 6;
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Carbon And Carbon Compounds (AREA)
Description
(No Model.)
T'. A. EDISON. MANUFACTURE OF CARBON PILAMBNTS.
No. 438,299. Patented Oct. 14, 1890.
ATTEBT! i INVENTOR: 6% 7/ V @1441 UNITED STATES FFICE.
ATENT THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY, ASSIGNOR TO THE EDISON ELECTRIC LIGHT COMPANY, OF NEW YORK, N. Y.
MANUFACTURE OF CARBON FILAMENTS.
SPECIFICATION forming part of Letters Patent No. 438,299, dated October 14, 1890.
Application filed March 16, 1883. Serial No. 88,353. (No model.)
To aZZ 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 Improvement in Carbonizing, (Case No. 541,) of which the following is a specification.
My invention relates to the process of carbonizing filaments for the incandescing conductors of electric lamps. I have found that the higher the temperature to which such filaments are raised before decomposition commences the more complete will be the carbonization and the more compact and homo geneous will be the residual carbon remaining after the process. By placing the filaments during carbonization under a higher than atmospheric pressure the temperature necessary for decomposition is raised to a point higher than the normal one. To accomplish this result, I place the filaments in a closed flask, in which is placed a quantity of hydrocarbon or of any other substance, which when heated gives off a gas or vapor other than oxygen-that is, one which will not injure the filaments during carbonization. The gas or vapor given off by this substance increases the pressure in the flask to the desired point. In order to maintain this increased pressure, I place the flask within an outer closed flask or chamber, which also contains a quantity of the same or asimilar substance, and the gas or vapor given off by which prevents a reduction of pressure by leakage from the inner chamber.
My invention is illustrated in the accompanying drawing, which is a sectional view of the apparatus employed.
A is an outer flask, and B an inner one, both being made of a materialsuch as carbon or nickel-capable of withstanding high temperature. Each is provided with a tightlysecured cover. Within the inner flask B are placed the molds a a, containing the filaments to be carbonized. The whole is placed in a suitable furnace, the outer flask A being of such height that its upper part projects well above the fire.
Within each flask is placed a portion of the hydrocarbon or other compound I"), which upon composed. After carbonization the cover of the flask A is removed and the chamber B can then be lifted out.
\Vhat I claim is 1. The method of carbonizing, consisting in heating the carbonizable material in the 6;
presence of a substance which gives off a gas other than oxygen to increase the pressure in the carbonizing-flask, and maintaining such pressure by heating a similar material in a chamber surroundingsaid flask, substantially as set forth.
2. The combination, in carbonizing apparatus, of a flask containing the material to be carbonized and a substance which gives off a gas other than oxygen when heated, and an outer inclosing-flask containing a similar substance, substantially as set forth.
3. The combination, in carbonizing apparatus, of a flask, a series of molds in said flask containing the material to be carbonized, a substance in said flask which gives off a gas other than oxygen when heated, and an outer inclosin gflask containing a similar substance, substantially as set forth.
This specification signed and witnessed this 17th day of February, 1883.
THOS. A. EDISON. Witnesses:
H. WV. SEELY, EDWARD H. PYATT.
The press- 55
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US438299A true US438299A (en) | 1890-10-14 |
Family
ID=2507200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US438299D Expired - Lifetime US438299A (en) | Thomas a |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US438299A (en) |
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0
- US US438299D patent/US438299A/en not_active Expired - Lifetime
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