IGNITION DISTRIBUTOR COMPRISING RADIO INTERFERENCE SUPPRESSION FEATURE

摘要

An ignition distributor for automotive vehicles comprises a shaft, a rotor arm mounted on the shaft for rotation therewith, a stationary center electrode mounted coaxially with the shaft, and a plurality of angularly spaced stationary outer electrodes. A contact member is secured to the rotor arm which extends between the center of the shaft and a point adjacent to the outer electrode and comprises a baseplate secured to the rotor arm and a resistive film secured to the baseplate, the latter being in electrical contact with the center electrode and in radially inwardly spaced from the outer electrode such that a sudden breakdown of air occurs when the outer end of the contact plate is positioned in priximity to the outer electrode generating an electric discharge. The baseplate is composed of a material having lower electrical conductivity than that of the resistive film so that a distributed constant RC transmission path is formed along the passage of the discharge current.