(under subclass 118) Subject matter in which one of the ignition spark electrodes is supported by the shell, and is mounted so as to be removable therefrom.
(1) Note. The removable electrode supported by the shell may be attached to a sleeve or other supporting means fastened between the shell and core so that the core must be removed to remove the electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
128, for spark plugs wherein the core supports a plurality of separate ignition electrodes with individual lead-in wires which are insulated from each other.
