(under subclass 78) Subject matter wherein the structure includes means whereby some feature of the device, such as the air gap, pole pieces, contacts, value of the actuating current or armature neutral position, may be adjusted or regulated.
SEE OR SEARCH THIS CLASS, SUBCLASS:
212, for electronic and ionic beam deflecting magnets or electromagnets with adjustable magnetic element.
298, for magnet core structure in general with movable or adjustable core.