US248427A - Thomas a - Google Patents
Thomas a Download PDFInfo
- Publication number
- US248427A US248427A US248427DA US248427A US 248427 A US248427 A US 248427A US 248427D A US248427D A US 248427DA US 248427 A US248427 A US 248427A
- Authority
- US
- United States
- Prior art keywords
- flask
- carbon
- thomas
- edison
- compartment
- 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 20
- 229910052799 carbon Inorganic materials 0.000 description 20
- 239000004020 conductor Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 206010022114 Injury Diseases 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
Images
Classifications
-
- 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
-
- 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
Definitions
- a now ordinary form of electric lamp consists of a carbon filament secured to conductors and hermetically inclosed in an exhausted glass globe or containing-chamber.
- the ends of the filament be enlarged somewhat, so as to furnish a larger bearing and contact surface.
- these enlarged clamping ends have been formed integral with the filament.
- fibers are used for the carbon filament of such size that they have not the mass of material necessary for the clamping ends to be formed integral therewitlnwhen such ends must be i'ormed or made thereon out of other carbon.
- My invention consists in a method and apparatus for this purpose, the latter beingshown in the accompanying drawing.
- B is an iron flask or vessel, having a cover, A, which fits tightly thereon.
- the flask is divided by thepartition gintotwo compartments, 0 and d.
- a number of carbon loops are placed in the flask, as shown, the larger part of each being in the compartment 0, While the ends 40 pass through slits in the partition 9 and project into the compartment (1.
- the cover is then placed on the flask, and the part of the flask comprising the compartment d is heated to a high temperature in any suitable manner, which may be, for instance, by placing the whole flask in a furnace, the compartment 0 of the flask being filled with finely-powdered charcoal or carbon,which protects the portions of the carbons therein sufliciently to prevent their destruction or injury, at the. same time preventing such diffusion of gas from the compartmentd as would make any sensible deposit on the portions in 0. Then, while the carbons are still very hot, the carbon vapor is forced into the pipe], and passes across the compartment d and out of the pipe 6. During its passage across the ends of the heated carbons it will be decomposed, and will deposit other carbon thereon, which will become a part thereof, thus enlarging the ends without increasing the size of the rest of the loop.
- any suitable manner which may be, for instance, by placing the whole flask in a furnace, the compartment 0 of the flask being filled with fine
- What I claim as my invention is 1.
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)
- Carbon And Carbon Compounds (AREA)
Description
(No Model.)
T. A: EDISON.
APPARATUS FOR TREATING OARB'ONS FOR ELECTRIC LAMPS. No. 248,427. Patented Oct. 18,1881.
NITED STATES PATENT OFFICEo THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY, ASSIGNOR TO THE EDISON ELECTRIC LIGHT COMPANY, OF NEW YORK, N. Y.
APPARATUS FOR TREATING CARBONS FOR ELECTRIC- LAMPS.
SPECIFICATION formingpart of Letters Patent No. 248,427, dated. October 18, 1881. Application fi ed January 11, 1881. (No model.)
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 anew and r useful Improvement in the Manufacture of Oarbons for Electric Lamps; and I do hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawing, and to the letto ters of reference marked thereon.
A now ordinary form of electric lamp, as shown in several patents hitherto granted me, consists of a carbon filament secured to conductors and hermetically inclosed in an exhausted glass globe or containing-chamber. In order that reliable and perfect electrical contact between the ends of the carbon filament and the conductors leading and secured thereto may be had, it is necessary that the ends of the filament be enlarged somewhat, so as to furnish a larger bearing and contact surface. When the nature of the material used admitted of it these enlarged clamping ends have been formed integral with the filament. In some cases, however, fibers are used for the carbon filament of such size that they have not the mass of material necessary for the clamping ends to be formed integral therewitlnwhen such ends must be i'ormed or made thereon out of other carbon.
My invention consists in a method and apparatus for this purpose, the latter beingshown in the accompanying drawing.
B is an iron flask or vessel, having a cover, A, which fits tightly thereon. The flask is divided by thepartition gintotwo compartments, 0 and d. A number of carbon loops are placed in the flask, as shown, the larger part of each being in the compartment 0, While the ends 40 pass through slits in the partition 9 and project into the compartment (1. The cover is then placed on the flask, and the part of the flask comprising the compartment d is heated to a high temperature in any suitable manner, which may be, for instance, by placing the whole flask in a furnace, the compartment 0 of the flask being filled with finely-powdered charcoal or carbon,which protects the portions of the carbons therein sufliciently to prevent their destruction or injury, at the. same time preventing such diffusion of gas from the compartmentd as would make any sensible deposit on the portions in 0. Then, while the carbons are still very hot, the carbon vapor is forced into the pipe], and passes across the compartment d and out of the pipe 6. During its passage across the ends of the heated carbons it will be decomposed, and will deposit other carbon thereon, which will become a part thereof, thus enlarging the ends without increasing the size of the rest of the loop.
What I claim as my invention is 1. The method oft'orming enlarged or clampin g ends upon carbon filaments and increasing the conductivity thereof, consisting in confining the ends of the filaments in a closed flask or vessel, heating such ends of the filaments to a high heat while carbon vapor is passed through the chamber, the part of the filaments not to be enlarged being suitably supported v and protected, substantially as set forth.
2. A flask or vessel divided by a partition into two parts, one of which is provided with inlet and outlet pipes for the passage of hydrocarbon vapor, substantially as and for the purpose described.
This specification signed and witnessed this 21st day of December, 1880.
THOS. A. EDISON. \Vitnesses:
H. W. SEELY, ERNEST J. BERGGREN.
Publications (1)
Publication Number | Publication Date |
---|---|
US248427A true US248427A (en) | 1881-10-18 |
Family
ID=2317748
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US248427D Expired - Lifetime US248427A (en) | Thomas a |
Country Status (1)
Country | Link |
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US (1) | US248427A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2817605A (en) * | 1947-03-24 | 1957-12-24 | Manuel C Sanz | Method for sealing the pores in a carbon body |
-
0
- US US248427D patent/US248427A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2817605A (en) * | 1947-03-24 | 1957-12-24 | Manuel C Sanz | Method for sealing the pores in a carbon body |
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