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:
Mar. 13, 1979
Filed:
Jun. 23, 1977
Kanemitsu Nishio, Nagoya, JP;
Shunichi Takagi, Nagoya, JP;
NGK Spark Plug Co., Ltd., Nagoya, JP;
Abstract
A spark plug is disclosed which is used for an internal combustion engine such as an automobile. The spark plug has a carbonaceous resistance sandwiched between its spark rod electrode and its terminal rod in the central through hole of an elongated hollow cylindrical ceramic insulator. The spark electrode is made of a heat and spark resisting semiconductive resistance material, is sealed integrally with the carbonaceous resistance in the central through hole of the insulator, and produces a spark discharge between a grounded electrode spaced therefrom by a predetermined gap. The spark plug of the above-mentioned construction enables the intensity of a noise wave produced upon the spark discharge to be suppressed to the lowest possible level.