The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 1999
Filed:
Jun. 16, 1998
Yoshihiko Kohmura, Nisshin, JP;
Takafumi Oshima, Nagoya, JP;
Noriyasu Sugimoto, Konan, JP;
Minoru Yasuda, Nagoya, JP;
NGK Spark Plug Co., Ltd., Nagoya, JP;
Abstract
In a high-voltage transformer, an insulating ring is placed on and along the inner surface of the core housing, and gaps are formed between the tips of the flange-like plates of the coil bobbin and the inner side of the insulating ring. With such a construction, the gaps and the insulating ring are provided between the coil bobbin and the inner wall of the core housing, so that the flange-like plates of the coil bobbin do not come in contact with the inner surface of cylindrical wall of the core housing. Therefore, a surface distance of the coil bobbin ranges to a contact surface of the coil bobbin where it comes in contact with the front wall of the core housing. The surface distance is elongated. The voltage drop by the creepage discharge does no occur.