Patents Assigned to Yamahara Hatsudoki Kabushiki Kaisha
  • Ignition circuit for self-purifying creeping discharge spark plugs
    Patent number: 4217873
    Abstract: An ignition circuit for self-purifying creeping discharge spark plugs is disclosed. The ignition circuit comprises a creeping discharge spark plug including a center electrode and a concentric ground electrode between which is formed a spark gap having a creeping surface along which sparks are slidably moved, a capacitor located near said spark gap and connected in parallel therewith, and an impedance element connected in series with said capacitor and not impeding the movement of the electric charge discharged from said capacitor.
    Type: Grant
    Filed: January 18, 1978
    Date of Patent: August 19, 1980
    Assignees: NGK Spark Plug Co. Ltd., Yamahara Hatsudoki Kabushiki Kaisha
    Inventors: Kanemitsu Nishio, Takashi Suzuki, Toshihiko Uenaga, Fumio Zega