Abstract: A method of manufacturing stator assemblies for dynamo electric machines in which the stator assemblies are of the kind including a hollow cylindrical yoke carrying a pole member on its inner surface comprising starting with a pole member having upstanding therefrom an integral spigot, and a yoke member, the wall of which includes a through bore of larger diameter than the spigot, performing a deforming operation on the yoke at the outer end of the bore to enlarge the diameter of the outer end of the bore and at the same time reduce the diameter of the bore intermediate its ends. The intermediate diameter of the bore is reduced to that of the spigot, and the spigot is then inserted through the bore from the inner end thereof so that the pole member lies against the inner surface of the yoke. The free end of the spigot is then deformed to produce a rivet head occupying the outer, enlarged region of the bore, and thus secure the pole member to the yoke.

Abstract: A roller clutch assembly for use in an internal combustion engine starter motor. The assembly includes a clutch outer member which is arranged to be driven and a clutch inner member which carries a pinion gear wheel. The clutch inner member and the pinion gear wheel are arranged as parts of a common member having a radial shoulder between the inner member and the gear wheel. A plurality of rollers lie between the inner and outer clutch members and a plurality of compression springs each urge a respective roller in a circumferential direction. An annular washer is carried by the outer clutch member and abuts the shoulder to prevent disengagement of the clutch inner member from the clutch outer member. The washer is formed in at least two parts and the parts defining the washer are so shaped that the abutting edges of the parts are disposed other than parallel to the convolusions of the springs.

Abstract: A face commutator for a dynamo electric machine comprises a body carrying a plurality of conductive segments. The segments are arranged in a circle with each segment extending radially. The rear face of each segment includes a channel the radially outermost wall of which is defined by a pair of rearwardly extending circumferentially divergent integral projections which key the outer end of the segment into the body. The other wall of the channel of each segment is defined by a rearwardly extending lug adjacent the radially inner end of the segment, the face of the lug presented to the pair of projections being undercut and so providing keying to the body at the radially innermost end of the segment.