AC Generator directly coupled with internal combustion engine

Claim 1

An AC generator for internal combustion engines, comprising: a generator casing; a stator including an armature core, a generator coil and an output terminal connected to an end of said coil, said stator being secured to an inner wall of said casing; a rotor fitted on a forward axial end of a crankshaft and including a hub secured by a mounting screw axially at the end of said crankshaft, claw tooth magnetic poles pressure-fitted on said hub, and a field coil arranged in a space formed by said claw tooth magnetic poles and said hub, said mounting screw being disposed coaxially with said crankshaft and electrically connected to one end of said field coil, and said rotor being arranged inside of said stator; a collector device including an annular conductor electrically connected to the other end of said field coil and arranged along a circumference of a predetermined radius from a center of said rotor, said collector device being secured to the axial end of said rotor; and brush means including a first brush electrically connected to a head of said mounting screw, and a second brush in sliding contact with a second collector conductor, said brush means being secured to said casing, whereby a field current flows through a path including said one end of said field coil, said mounting screw and said first brush.