US297585A - Thomas a - Google Patents
Thomas a Download PDFInfo
- Publication number
- US297585A US297585A US297585DA US297585A US 297585 A US297585 A US 297585A US 297585D A US297585D A US 297585DA US 297585 A US297585 A US 297585A
- Authority
- US
- United States
- Prior art keywords
- twisted
- strip
- filament
- paper
- carbonizable
- 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
- 239000000463 material Substances 0.000 description 22
- 239000004020 conductor Substances 0.000 description 16
- KRHYYFGTRYWZRS-UHFFFAOYSA-N HF Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000003763 carbonization Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 241000416162 Astragalus gummifer Species 0.000 description 2
- 229940106135 Cellulose Drugs 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229920001615 Tragacanth Polymers 0.000 description 2
- 238000010000 carbonizing Methods 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 235000010980 cellulose Nutrition 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 229920003245 polyoctenamer Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- 239000001117 sulphuric acid Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
Images
Classifications
-
- 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
- H01J1/15—Cathodes heated directly by an electric current
Landscapes
- Ropes Or Cables (AREA)
Description
(No Model.) T. A. EDISON.
INGANDBSGING OONDUGTOR FORELEGTRIG LAMPS. No. 297,585. I Patented Apr. 29, 1884.
AT TEST: INVEN TOR:
6596M 76W, /jm,
'filament into a solid mass.
. v UNIT D STATES PATENT OFFICE.
THOMAS A.' EDISON, OF MENLO PARK, NEW JERSEY.
INCANDESCINGCONDUCTOR FOR ELECTRIC LAMP S.
SPECIFICATION forming part of Letters Patent No. 297,585, dated April 29, 1884-.
Application filed October 10. 1883. (No model.)
1'0 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 Improvement in Incandescing Conductors for Electric Lamps, (Case No. 593,) of which the following is a specification.
The object of this invention is to produce incandescing conductors for electric lamps of even size, density, andresistance, and each of which shall be a homogeneous carbon filament. I accomplish this by twisting a strip of paper or other suitable carbonizable material tightly into an even cylindrical filament. I preferably employ a carbonizable cementing material to hold the twisted strip together.
The filament thus formed is a homogeneous one, not made up of a number of separate strands, like the conductors of thread which have been sometimes used, while it possesses the advantages of such thread conductors, being cylindrical and of small area and radiatingsurface. \Eeing all in one homogeneous piece, all its parts contract and expand evenly, and all are of the same texture and resistance. The strips of paper can be'cut with .great exactness, so that all will be of precisely the same size, and, being cut from the same quality of paper, very even blanks are produced. Such blanks are then drawn through a die of the desired size and twisted evenly by suitable ma chinery, so that all the blanks will be twisted to the same extent and all the filaments will be of the same size and density. Preferably the strips of paper are formedcwith broadened ends, and such ends are also tightly twisted. The carbonizable cementing material binds the Such material is preferably gum-tragacanth or other viscous carbonizable substance, with which the strip is covered before twisting. I may, however, first twist the strip, and then treat the twisted filament with hydrofluoric acid or other gelatinizing agent, gelatinizing a portion of its cel lulose, and thus forming the carbonizable cementing material uponand within the filament itself; or the twisted strip might be parchmentized by sulphuric acid or chloride of zinc. The filament, prepared as described, is carbonized in a suitable manner, and may then be attached to leading-in wires and placed in the lamp.
The accompanying drawing represents a paper strip or blank partly twisted. The flat blank, as shown at A, is twisted tightly into the filamentary form shown at B. The blank is formed with enlarged ends a, which are twisted into cylindrical form, as at b.
What I claim is- 1. The incandescing conductor for an electric lamp, consisting of a carbonized tightly,
twisted strip of paper or other suitable car bonizable material, substantially as set forth.
2. The incandescing conductor for an electric lamp, consisting of a carbonized tightlytwisted strip of paper or other suitablecarbonizable material provided with a carbon izable cementing material, substantially as set forth.
3. The filament for forming, on carbonization, the incandescing conductor of an electric lamp, consisting of a tightly twisted strip of paper or other suitable carbonizable material,
substantially as set forth.
4. The filament for carbonization, consisting of a tightly-twisted strip of paper provided with a carbonizable cementing material, substantially as set forth.
5. The method of forming incandescing conductors for electric lamps, consisting in twistment, treating the same with hydrofluoric acid or other gelatinizing or parchmentizing agent, to form a cementing material, and carbonizing the whole, substantially as set forth.
This specification signed and witnessed this 14th day of September, 1883.
THOS. A. EDISON.
lVitnesses:
H. W. SEELY,
EDWARD H. PYATT.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US297585A true US297585A (en) | 1884-04-29 |
Family
ID=2366768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US297585D Expired - Lifetime US297585A (en) | Thomas a |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US297585A (en) |
-
0
- US US297585D patent/US297585A/en not_active Expired - Lifetime
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