Abstract: An advance plate assembly comprising a slim thickness, measured along the axis of the distributor, and comprising improved means to mount the assembly in the distributor housing. The invention also comprises one of a plurality of finger springs which hold the plate in any position securely, and yet permit easy changing of the position. Two different forms, one using set screws and the other using a split spring ring, to hold the assembly in the distributor housing are also disclosed. Improved means comprising a tongue on the finger spring which fits in a notch in the main bushing of the assembly is also disclosed.

Abstract: An improved multi-spark capacitor discharge (CD) ignition having independent circuits for charging and discharging the main capacitor, a flyback DC to DC converter, and an inductive filter interposed between the ignition coil and the main capacitor on one side, and the charging transformer on the other side.

Abstract: A gas detector having the features of defective sensor indication, different alarm signals for higher and lower dangerous gas levels, and an away alarm to indicate that an alarm has been activated but that the dangerous gas has by now dissipated.