GB300911A - Improvements relating to the manufacture of insulated plates of magnetic material for electrical purposes - Google Patents
Improvements relating to the manufacture of insulated plates of magnetic material for electrical purposesInfo
- Publication number
- GB300911A GB300911A GB33852/28A GB3385228A GB300911A GB 300911 A GB300911 A GB 300911A GB 33852/28 A GB33852/28 A GB 33852/28A GB 3385228 A GB3385228 A GB 3385228A GB 300911 A GB300911 A GB 300911A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plates
- sodium silicate
- parts
- magnesia
- oven
- 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
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/16—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets
- H01F1/18—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets with insulating coating
Abstract
300,911. Associated Electrical Industries, Ltd., (formerly Metropolitan- Vickers Electrical Co., Ltd.), (Assignees of Gross. J. E.). Nov. 19, 1927, [Convention date]. Insulation; electromagnets. - Core plates for dynamo-electric machines and transformers, or similar magnetic plates' with an adherent insulating film, are coated with an aqueous solution of sodium silicate and one or more carbohydrate compounds or glycerine, with or without the addition of a filling material. The sodium silicate solution preferably has a specific gravity between 1.15 and 1.3 and for the carbohydrate ingredient sugar, starch or dextrin may be used. An example consists of 45 parts of sodium silicate, 10 parts sugar and 60 parts water. When the plates are annealed after the coating has been applied, the carbohydrates break down and prevent the adhesion between the plates which would result from fusion of the silicate if this were used alone. As filling materials, talc, silica clays, magnesia, mica and insulating oxides, such as those of iron, aluminium and magnesia may be employed. The coating solution is applied by spraying, dipping or painting and the baking is preferably effected on a conveyer which carries the sheets in about 25 seconds through an oven so arranged as to give a uniform temperature gradient up to between 125‹ C. and 150‹ C. at the back of the oven.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US300911XA | 1927-11-19 | 1927-11-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB300911A true GB300911A (en) | 1930-01-30 |
Family
ID=21852445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33852/28A Expired GB300911A (en) | 1927-11-19 | 1928-11-19 | Improvements relating to the manufacture of insulated plates of magnetic material for electrical purposes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB300911A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2299708A1 (en) * | 1975-01-30 | 1976-08-27 | British Steel Corp | ELECTRICALLY INSULATING COATING AND ITS PREPARATION PROCESS |
| GB2208974A (en) * | 1987-08-21 | 1989-04-19 | Johnson Electric Ind Mfg | Electric motor armature |
| US9543064B2 (en) | 2011-07-26 | 2017-01-10 | Siemens Aktiengesellschaft | Electric machine having a low-mass design in magnetically active parts |
-
1928
- 1928-11-19 GB GB33852/28A patent/GB300911A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2299708A1 (en) * | 1975-01-30 | 1976-08-27 | British Steel Corp | ELECTRICALLY INSULATING COATING AND ITS PREPARATION PROCESS |
| GB2208974A (en) * | 1987-08-21 | 1989-04-19 | Johnson Electric Ind Mfg | Electric motor armature |
| US9543064B2 (en) | 2011-07-26 | 2017-01-10 | Siemens Aktiengesellschaft | Electric machine having a low-mass design in magnetically active parts |
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