EP 0318613 A1 19890607 - High-voltage transformer and method for making same.
Title (en)
High-voltage transformer and method for making same.
Title (de)
Hochspannungstransformator und Verfahren zu seiner Herstellung.
Title (fr)
Transformateur à haute tension et son procédé de fabrication.
Publication
Application
Priority
EP 87117994 A 19871204
Abstract (en)
A high-voltage transformer (101) such as an ignition coil for internal combustion engines and a method for making same are disclosed. A primary coil (3) and a secondary coil (4) are accommodated in a coil case (2) with the secondary coil disposed around the primary coil. An iron core having a plurality of iron core sections (610) is disposed in the coil case so as to surround the primary and secondary coils. Each of the iron core sections comprises a pair of first (612) and second (611) core members having a substantially similar configuration such as a channel form, an L-shaped form or the like. The first and second core membres are assembled in such a manner that the first members are in abutting engagement at one end thereof with the second members at one end thereof, but in a spaced face-to-face relation at the other end thereof with the second members at the other end thereof with a limited gap (613) formed therebetween. A resin (7) is filled into the coil case for electrically insulating the primary and secondary coils from the iron core as well as firmly securing them to the coil case.
IPC 1-7
IPC 8 full level
H01F 38/12 (2006.01)
CPC (source: EP)
H01F 38/12 (2013.01)
Citation (search report)
- [Y] DE 3423524 A1 19860102 - BERTOS AG [CH]
- [A] GB 542864 A 19420129 - BBC BROWN BOVERI & CIE
- [A] FR 2397051 A1 19790202 - PROSPECTION & SALES [FR]
- [A] GB 199879 A 19230705 - BRITISH LIGHTING AND IGNITION, et al
- [A] GB 584861 A 19470124 - BENDIX AVIAT CORP
- [A] US 2701865 A 19550208 - GETZ RAYMOND F, et al
- [A] US 4203404 A 19800520 - CANUP ROBERT E [US]
- [Y] PATENT ABSTRACTS OF JAPAN, vol. 11, no. 77 (E-487)[2524], 7th March 1987; & JP-A-61 231 708 (MITSUBISHI ELECTRIC CORP.) 16-10-1986
- [A] PATENT ABSTRACTS OF JAPAN, vol. 9, no. 284 (E-357)[2007], 12th November 1985; & JP-A-60 126 807 (NIPPON DENSO K.K.) 06-07-1985
Designated contracting state (EPC)
DE
DOCDB simple family (publication)
EP 0318613 A1 19890607; EP 0318613 B1 19920909; DE 3781692 D1 19921015; DE 3781692 T2 19930121
DOCDB simple family (application)
EP 87117994 A 19871204; DE 3781692 T 19871204