An ignition coil is an induction coil in an automobile's ignition system which transforms the battery's 12 volts to the thousands of volts (20 to 30 thousand volts or more) needed to spark the spark plugs.
A spark plug is an electrical device that fits into the cylinder head of some internal combustion engines and ignites compressed fuels such as aerosol, gasoline, ethanol, and liquefied petroleum gas by means of an electric spark.
A distributor is a device in the ignition system of an internal combustion engine that routes high voltage from the ignition coil to the spark plugs in the correct firing order. The first reliable battery operated ignition was developed by Delco and introduced in the 1910 Cadillac.