Spark plug having a built-in resistor for suppressing noise sign

Electric lamp and discharge devices – Spark plugs – Plural part center electrode lead-in

Patent

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Details

313134, 313144, 313145, 252503, 252504, 252507, H01T 1305

Patent

active

050085840

ABSTRACT:
A spark plug containing a resistor which is a sintered body made from a mixture comprising coarse glass particles and fine glass particles, coarse ceramic particles and fine ceramic particles, and carbon black in special proportions is improved in noise signal suppression effect.

REFERENCES:
patent: 3909459 (1975-09-01), Friese et al.
patent: 4173731 (1979-11-01), Takagi et al.

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