Pole claw member for a dynamo electric machine rotor

Details Pole claw member for a dynamo electric machine rotor Pole claw member for a dynamo electric machine rotor

1977-03-21

1978-10-03

Larson, Lowell A.

Electrical generator or motor structure

Dynamoelectric

Rotary

113116V, 310263, 29598, B21D 5326

Patent

active

041177932

ABSTRACT:
A method of manufacturing a pole claw member for a dynamo electric machine comprises in a first embodiment forming a serrated longitudinal edge in a ferrous strip and bending the serrated strip to form a cylinder with the serrations extending axially. The ends of the strip are then secured together by welding, rivetting or by a tang and aperture connection to produce a coronet form. The coronet form is then deformed in one or more, preferably three, die forming steps to produce the desired shape of claw and to define an annular base at the end of the cylinder.
In an alternative embodiment, the coronet form is produced by punching out portions of a previously formed tube and is then deformed as in the first embodiment.

REFERENCES:
patent: 2795715 (1957-06-01), Gilchrist
patent: 3129505 (1964-04-01), Cox
patent: 3573519 (1971-04-01), Kumazawa
patent: 3601876 (1971-08-01), Vogt

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