GB795700A - Improvements in and relating to silica-containing carbon brushes - Google Patents
Improvements in and relating to silica-containing carbon brushesInfo
- Publication number
- GB795700A GB795700A GB34099/55A GB3409955A GB795700A GB 795700 A GB795700 A GB 795700A GB 34099/55 A GB34099/55 A GB 34099/55A GB 3409955 A GB3409955 A GB 3409955A GB 795700 A GB795700 A GB 795700A
- Authority
- GB
- United Kingdom
- Prior art keywords
- brush
- silica
- brushes
- impregnated
- baking
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/04—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of carbon-silicon compounds, carbon or silicon
Landscapes
- Motor Or Generator Current Collectors (AREA)
Abstract
795,700. Impregnated electric contact brushes. UNION CARBIDE CORPORATION, [formerly UNION CARBIDE & CARBON CORPORATION]. Nov. 29, 1955 [Dec. 7, 1954], No. 34099/55. Class 140. A method of making an electrical contact brush having an improved service life comprises impregnating a carbonaceous brush with a solution or suspension of silica in water or of a silicone resin or organic silicate in a suitable solvent and thereafter baking the impregnated brush at a temperature between 1000‹ C. and 1600‹ C. The brushes may be plain carbon, graphitic or electrographitic brushes. The brush stock may be impregnated with a colloidal solution of silica in water, quickly chilled to 0‹ C. or lower, dried and then baked first at a temperature between 600<SP>0</SP> C. and 850‹ C. and subsequently between 1000‹ C. and 1600‹ C. A specified solution of an organic silicate is ethyl silicate in ethanol. The baking process may be carried out in a series of steps at successively higher baking temperatures, with a cooling stage between each baking step.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US795700XA | 1954-12-07 | 1954-12-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB795700A true GB795700A (en) | 1958-05-28 |
Family
ID=22151370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34099/55A Expired GB795700A (en) | 1954-12-07 | 1955-11-29 | Improvements in and relating to silica-containing carbon brushes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB795700A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4420374A1 (en) * | 1994-06-10 | 1995-12-14 | Lorson Harald Dr Ing | Prodn. of silicon carbide protective layer |
-
1955
- 1955-11-29 GB GB34099/55A patent/GB795700A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4420374A1 (en) * | 1994-06-10 | 1995-12-14 | Lorson Harald Dr Ing | Prodn. of silicon carbide protective layer |
| DE4420374C2 (en) * | 1994-06-10 | 2000-06-29 | Harald Lorson | Process for the production of SiC layers on graphite bodies or carbon fibers |
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