Laminated core and support assembly for a dynamoelectric machine

Claim 1

A dynamoelectric machine magnetic core assembly comprising, a stack of generally flat, insulated metal laminations arranged in face-to-face relationship to define a rotor-receiving bore, first and second clamping annuli positioned respectively at the opposite ends of said stack of laminations with an inner portion of each annulus extending radially outward from the stack, a first and a second annular spacer block disposed, respectively, between one clamping annulus and one end of the stack of laminations, a plurality of elongated bars having their respective ends welded to the respective radially outwardly extending portions of the sides of said annuli facing the ends of said stack, at least one of said annuli being formed with said inner portion thereof deflected axially outward with respect to said outer portion thereof, each of said bars being substantially equal in length and in the range of 4 to 60 mils shorter than the combined axial length of the stack of laminations and said shorter spacer blocks, thereby to cause the clamping annuli to apply a continuous compressive force on the stack of laminations.