Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
228 words
A method of manufacturing a rotor assembly for a dynamo electric machine comprising the steps of: a. stamping an annular conductive disc to produce in one face thereof a plurality of angularly spaced, generally radial grooves which divide the disc into conductive segments and which have a depth greater than the thickness of the disc so that corresponding ribs are formed on the other face of the disc, b. moulding an insulating body on said one face of the disc so that the grooves are filled with insulating material, c. forming a slot in each of the conductive segments defined between pairs of adjacent grooves, d. engaging one end of at least one of a respective pair of rotor windings of the dynamo electric machine in each of the slots in the conductive segments, e. resistance joining the ends of the rotor windings received in the slots of at least two conductive segments to their respectivE segements by using at least two electrodes to pass an electric current through the windings, the segments and the at least one rib defined between the segments, each electrode engaging at least one of the components defined by one of said segments and the windings associated with said one segment, and f. machining said other face of the disc to remove said ribs and thereby separate the conductive segments from one another.
Claim 2
Independent Claim
228 words
A method of manufacturing a rotor assembly for a dynamo electric machine comprising the steps of: a. stamping an annular conductive disc to produce in one face thereof a plurality of angularly spaced, generally radial grooves which divide the disc into conductive segments and which have a depth greater than the thickness of the disc so that corresponding ribs are formed on the other face of the disc, b. moulding an insulating body on said one face of the disc so that the grooves are filled with insulating material, c. forming a slot in each of the conductive segments defined between pairs of adjacent grooves, d. engaging one end of at least one of a respective pair of rotor windings of the dynamo electric machine in each of the slots in the conductive segments, e. resistance joining the ends of the rotor windings received in the slots of at least two conductive segments to their respectivE segements by using at least two electrodes to pass an electric current through the windings, the segments and the at least one rib defined between the segments, each electrode engaging at least one of the components defined by one of said segments and the windings associated with said one segment, and f. machining said other face of the disc to remove said ribs and thereby separate the conductive segments from one another.
Claim 3
Dependent Claim
43 words
A method as claimed in claim 1 wherein when the electrodes contact the conductive segments without contacting at least one of the windings in each of the slots, the windings are located against movement in the slots prior to the resistance joining operation.
Claim 4
Dependent Claim
31 words
A method as claimed in claim 2 wherein the windings are located against movement in the slots by deformation of the walls of the slots to key the windings in position.
Claim 5
Dependent Claim
19 words
A method as claimed in claim 1 wherein step (b) is performed before steps (c), (d), (e) and (f).
Claim 6
Dependent Claim
22 words
A method as claimed in claim 1 wherein step (b) is performed after steps (c), (d) and (e) but before step (f).
Claim 7
Dependent Claim
25 words
A method as claimed in any claim 1 wherein the resistance joining operation is performed successively for each set of at least two conductive segments.
Claim 8
Dependent Claim
19 words
A method as claimed in claim 1 wherein the resistance joining operation is performed simultaneously for all the segments.