US470922A - Manufacture of filaments for incandescent lamps - Google Patents
Manufacture of filaments for incandescent lamps Download PDFInfo
- Publication number
- US470922A US470922A US470922DA US470922A US 470922 A US470922 A US 470922A US 470922D A US470922D A US 470922DA US 470922 A US470922 A US 470922A
- Authority
- US
- United States
- Prior art keywords
- sheets
- filaments
- sheet
- paper
- incandescent lamps
- 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 8
- KRHYYFGTRYWZRS-UHFFFAOYSA-N HF Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 16
- 239000000463 material Substances 0.000 description 16
- 239000004020 conductor Substances 0.000 description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000003763 carbonization Methods 0.000 description 4
- 241000416162 Astragalus gummifer Species 0.000 description 2
- 229920001615 Tragacanth Polymers 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000011345 viscous material Substances 0.000 description 2
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
- Y10T156/1062—Prior to assembly
- Y10T156/1075—Prior to assembly of plural laminae from single stock and assembling to each other or to additional lamina
Definitions
- the object of this invention is to produce incandescing conductors for electric lamps which shall be of even density and resistance.
- Incandescing conductors for electric lamps which shall be of even density and resistance.
- In the former case any defects in the texture of the paper or slight variations in the thickness of the sheet will appear in the conductors, causing differences in the density and resistance of such conductors as may, be cut from portions of the sheet containing the defects or variations.
- the article is improved; but the process of making it is slow and difficult.
- the cementing material used to unite the tissue-paper sheets may be gum-tragacanth or any other suitable carbohydrate or viscous substance carbonizable without entire volatilization.
- the sheets of tissue-paper (which I prefer to use) are preferably soaked in a thick mass of this substance, or the latter may be rubbed upon the surfaces of the sheets. Two or more of these sheets are then placed together, preferably with the grain at right angles, as explained.
- the sheet thus formed is dried under strain or pressure, or both, so that in drying it will contract evenly and produce a sheet or blank of even texture and thickness throughout. From this blank the conductors are formed in the desired shape and are then carbonized in a suitable manner, orthe filaments may, as stated, be formed after carbonization.
- such material may be formed upon the sheets by treating them separately with the hydrofluoric acid to gelatinize the surfaces of the sheets. The sheets are then placed together and dried under strain and pressure, as before.
- What I claim is 1.
- the method of forming blanks or sheets for the purpose mentioned consisting in treating separately two or more sheets of paper with hydrofluoric acid to form a cementing material and then placing such sheets together, substantially as set forth.
Landscapes
- Moulds, Cores, Or Mandrels (AREA)
- Paper (AREA)
Description
M'IINITE STATES PATENT OFFICE.
THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY.
MANUFACTURE OF FlLAMENTS FOR INCANDESCENT LAMPS.
SPECIFICATION forming part of Letters Patent No. 470,922, dated March 15, 1892.
Application filed October 10, 1883. Serial No. 108,563. (No specimens.)
To all whom it may concern:
Be it known that I, THOMAS A. EDISON, o Menlo Park, in the county of Middlesex and State of New Jersey, have invented a new and useful Improvement in the Manufacture of Incandescing Conductors for Electric Lamps, (Case No. 594,) of which the following is a specification.
The object of this invention is to produce incandescing conductors for electric lamps which shall be of even density and resistance. Heretofore in manufacturing such conductors from paper they have been cut or punched from single sheets of paper of the proper thickness, or have been built up by placing together several filaments separately out from paper sheets with the fiber in some of the filaments at an angle with those in other filaments, and which have been compressed and carbonized. In the former case any defects in the texture of the paper or slight variations in the thickness of the sheet will appear in the conductors, causing differences in the density and resistance of such conductors as may, be cut from portions of the sheet containing the defects or variations. In the latter case the article is improved; but the process of making it is slow and difficult. Iremedy the objections mentioned by employing two or more sheets of thin paper placed one upon the other and formed by a carbonizable cementing material into a homogeneous sheet. From this sheet the filaments are cut or punched, as before, and are then carbonized, or the entire sheet may be-carbonized and the conductors formed from it after carbonization. By thus placing several sheets together the defects in any one sheet are counteracted or compensated for by the other sheets, each defective portion extending through only a part of the entire sheet, from which the filaments are cut.
In placing the sheets together I prefer to place them so that the grain of the paper of each sheet lies at right angles to that of the adjacent sheet or sheets. Filaments cut from a single sheet are weakened from the grain of the paper lying all in one direction, and this defect is obviated by placing the two or more sheets together in the manner stated.
The cementing material used to unite the tissue-paper sheets may be gum-tragacanth or any other suitable carbohydrate or viscous substance carbonizable without entire volatilization. The sheets of tissue-paper (which I prefer to use) are preferably soaked in a thick mass of this substance, or the latter may be rubbed upon the surfaces of the sheets. Two or more of these sheets are then placed together, preferably with the grain at right angles, as explained. The sheet thus formed is dried under strain or pressure, or both, so that in drying it will contract evenly and produce a sheet or blank of even texture and thickness throughout. From this blank the conductors are formed in the desired shape and are then carbonized in a suitable manner, orthe filaments may, as stated, be formed after carbonization.
Instead of covering the sheets with a cementing material, such material may be formed upon the sheets by treating them separately with the hydrofluoric acid to gelatinize the surfaces of the sheets. The sheets are then placed together and dried under strain and pressure, as before.
What I claim is 1. The method of forming blanks or sheets for the purpose mentioned, consisting in treating separately two or more sheets of paper with hydrofluoric acid to form a cementing material and then placing such sheets together, substantially as set forth.
2. The method of forming carbon filaments for incandescent lamps, which consists in treating two or more sheets of paper with hydrofluoric acid to form a cementing material,
placing said sheets together to form a single sheet, 'and cutting filaments therefrom, substantially as described.
3. The method of forming carbon filaments for incandescent lamps, which consists in treating two or more sheets of paper with hydrofluoric acid to form a cementing material, placing said sheets together to form a single sheet, and cutting filaments therefrom, substantially as described.
4. The method of forming carbon filaments for incandescent lamps, which consists in This specification signed and witnessed this treating two or more sheets of paper with hy- 14th day of September, 1883. (lrofluoric acid to form a cementing material, placing said sheets together to form a single TIIOS. A. EDISON. 5 sheet, the grain in one sheet being at an angle with the grain in the other sheet 01 sheets, Vitnesses: and cutting fi'lam ents therefrom, substantially H. WV. SEELY, as described. EDW'ARD II. PYAT'I.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US470922A true US470922A (en) | 1892-03-15 |
Family
ID=2539782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US470922D Expired - Lifetime US470922A (en) | Manufacture of filaments for incandescent lamps |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US470922A (en) |
-
0
- US US470922D patent/US470922A/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Raabe et al. | Biocomposite of cassava starch reinforced with cellulose pulp fibers modified with deposition of silica (SiO2) nanoparticles | |
| US470922A (en) | Manufacture of filaments for incandescent lamps | |
| JPH0449747B2 (en) | ||
| US3354247A (en) | Method of producing porous separators | |
| DE3335638C2 (en) | ||
| US1173452A (en) | Electric condenser and process of making the same. | |
| US671467A (en) | Manufacture of built-up veneer. | |
| ATE38169T1 (en) | FLAT FORM WITH AT LEAST TWO LAYERS. | |
| US726485A (en) | Insulating material. | |
| US1030787A (en) | Incandescing element. | |
| JPH0528470B2 (en) | ||
| US446669A (en) | Thomas a | |
| US543986A (en) | Thomas a | |
| KR20210072913A (en) | Composite filament having improved heat resistance and mechanical property and method of fabricating thereof | |
| US297585A (en) | Thomas a | |
| US858385A (en) | Method of making insulating-tubes. | |
| US809100A (en) | Hollow roll pastry. | |
| US277846A (en) | Caibons fob incandescent lamps | |
| US365509A (en) | Thomas a | |
| US254672A (en) | Hiram s | |
| CN108299713A (en) | A kind of doping antibacterial oxide type high-strength polyethylene film and preparation method thereof | |
| US687531A (en) | Insulating material. | |
| US283225A (en) | Manufacture of artificial ivory | |
| US390462A (en) | Thomas a | |
| US2134659A (en) | Synthetic fibrous product and process of making the same |