Wireworking – Article making or forming – Forms and frames
Patent
1976-09-02
1977-07-05
Larson, Lowell A.
Wireworking
Article making or forming
Forms and frames
242 11R, B21F 300, H02K 1504
Patent
active
040333850
ABSTRACT:
An apparatus and method for placing magnet wire in slots respectively defined by the blades of coil transfer apparatus thereby to form a dynamoelectric machine field winding. The wire is pushed through a rotating nozzle having a dispensing exit which directs the wire along at least a first predetermined path having sections respectively aligned with the open ends of two of the slots whereby the wire is pushed into the two slots. The relationship of the rate of wire pushing to the nozzle angular velocity is selectively controlled to determine the size and shape of the predetermined path and hence the desired configuration of the resulting coil. In a preferred apparatus and method, the nozzle is rotated at alternately increasing and decreasing speeds while the wire is pushed at a constant rate to form a coil having an alternately increasing and decreasing the nozzle. The radial spacing of the dispensing exit from the rotational axis of the nozzle and the location of the rotational axis relative to the slots may also be selectively controlled. In the preferred apparatus, two nozzles rotating in synchronism with one another are employed to simultaneously direct two wires into diametrically opposite sets of slots defined by the blades of coil transfer apparatus arranged in a cylindrical array thereby to simultaneously form a first two coils of one like configuration and to subsequently form at least two additional coils of a different like configuration each serially connected to a respective one of the first two coils. Upon indexing of the coil transfer apparatus into another angular position, the operating cycle of the apparatus may be repeated to form further sets of coils pushed into other sets of slots.
REFERENCES:
patent: 3493186 (1970-02-01), Arick
patent: 3903933 (1975-09-01), Arick et al.
Essex Group Inc.
Freiburger Lawrence E.
Larson Lowell A.
Sommer Robert D.
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