GB1338769A - Laminated magnetic core for induction devices and laminations for forming such magnetic core - Google Patents
Laminated magnetic core for induction devices and laminations for forming such magnetic coreInfo
- Publication number
- GB1338769A GB1338769A GB5866771A GB5866771A GB1338769A GB 1338769 A GB1338769 A GB 1338769A GB 5866771 A GB5866771 A GB 5866771A GB 5866771 A GB5866771 A GB 5866771A GB 1338769 A GB1338769 A GB 1338769A
- Authority
- GB
- United Kingdom
- Prior art keywords
- laminations
- magnetic core
- metal
- strip
- central
- 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
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/08—High-leakage transformers or inductances
- H01F38/10—Ballasts, e.g. for discharge lamps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0233—Manufacturing of magnetic circuits made from sheets
Abstract
1338769 Transformers ELEKTROAPPABATEBAU F KNOBEL & CO ENNENDA 17 Dec 1971 [28 Dec 1970] 58667/71 Heading HIT A lamination layer, used to construct magnetic cores for electric induction devices, comprises two similar U-shaped sections, 11 and 12 (Fig. 1) and a central member 13, inserted between the yoke members 11c and 12c, forming an adjustable air gap, 16, between itself and the appropriate yoke as shown in, Fig. 1. The two sections, 11 and 12, may be stamped out from a strip of metal as shown in Fig. 1a, the central piece that remains providing the movable central leg, 13, or the sections may be stamped from a strip of metal as shown in Fig. 2a, and the central piece, 13, is then cut from an entirely separate strip of metal. The stamping out of the laminations is arranged such that the cross-sectional area of the central leg is twice that of the shell. The width of the laminations (yokes) can be reduced when the device is to be enclosed in a container of sheet iron which acts as part of the magnetic circuit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1923170A CH536545A (en) | 1970-12-28 | 1970-12-28 | Laminated magnetic core for induction devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1338769A true GB1338769A (en) | 1973-11-28 |
Family
ID=4438153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5866771A Expired GB1338769A (en) | 1970-12-28 | 1971-12-17 | Laminated magnetic core for induction devices and laminations for forming such magnetic core |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US3694784A (en) |
| AT (1) | AT311486B (en) |
| BE (1) | BE777083A (en) |
| CA (1) | CA939765A (en) |
| CH (1) | CH536545A (en) |
| ES (1) | ES398127A1 (en) |
| FR (1) | FR2120827A5 (en) |
| GB (1) | GB1338769A (en) |
| IL (1) | IL38409A (en) |
| IT (1) | IT945686B (en) |
| NL (1) | NL7117580A (en) |
| NO (1) | NO133116C (en) |
| SE (1) | SE369002B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2950789C2 (en) * | 1979-12-17 | 1982-07-01 | May & Christe Gmbh, Transformatorenwerke, 6370 Oberursel | Ballast for fluorescent lamps |
| ES2079925T3 (en) * | 1992-07-20 | 1996-01-16 | Knobel Lichttech | REACTANCE COIL OR TRANSFORMER WITH E-SHAPED NUCLEUM SHEETS FORMED BY TWO U-SHAPED SHEETS. |
| US6865057B2 (en) * | 1999-10-05 | 2005-03-08 | Seagate Technology Llc | Gapless longitudinal magnetic recording head with flux cavity |
| US6865056B1 (en) | 1999-10-05 | 2005-03-08 | Seagate Technology Llc | Longitudinal magnetic recording heads with variable-length gaps |
| TW200618003A (en) * | 2004-11-26 | 2006-06-01 | Mu-Tu Li | Electric device, and its labor and materials |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB803914A (en) * | 1955-04-20 | 1958-11-05 | Bernhard Philberth | Stationary electromagnetic induction apparatus |
| US3201731A (en) * | 1962-11-27 | 1965-08-17 | Electro Netic Steel Inc | Transformer core and lamination therefor |
-
1970
- 1970-12-20 ES ES398127A patent/ES398127A1/en not_active Expired
- 1970-12-28 CH CH1923170A patent/CH536545A/en not_active IP Right Cessation
-
1971
- 1971-12-14 NO NO4608/71A patent/NO133116C/no unknown
- 1971-12-17 GB GB5866771A patent/GB1338769A/en not_active Expired
- 1971-12-20 IL IL38409A patent/IL38409A/en unknown
- 1971-12-21 NL NL7117580A patent/NL7117580A/xx not_active Application Discontinuation
- 1971-12-21 BE BE777083A patent/BE777083A/en unknown
- 1971-12-22 FR FR7146121A patent/FR2120827A5/fr not_active Expired
- 1971-12-22 SE SE16445/71A patent/SE369002B/xx unknown
- 1971-12-23 AT AT1110771A patent/AT311486B/en not_active IP Right Cessation
- 1971-12-23 CA CA130,931A patent/CA939765A/en not_active Expired
- 1971-12-27 US US212454A patent/US3694784A/en not_active Expired - Lifetime
- 1971-12-28 IT IT55049/71A patent/IT945686B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| SE369002B (en) | 1974-07-29 |
| IL38409A (en) | 1974-06-30 |
| FR2120827A5 (en) | 1972-08-18 |
| NL7117580A (en) | 1972-06-30 |
| ES398127A1 (en) | 1974-07-16 |
| NO133116B (en) | 1975-12-01 |
| DE2162543A1 (en) | 1972-07-27 |
| DE2162543B2 (en) | 1976-01-15 |
| IT945686B (en) | 1973-05-10 |
| NO133116C (en) | 1976-03-10 |
| IL38409A0 (en) | 1972-02-29 |
| BE777083A (en) | 1972-04-17 |
| US3694784A (en) | 1972-09-26 |
| CH536545A (en) | 1973-04-30 |
| AT311486B (en) | 1973-11-26 |
| CA939765A (en) | 1974-01-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |