Motor coil retention apparatus

Electrical generator or motor structure – Dynamoelectric – Rotary

Patent

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Details

310 42, 310 91, H02K 118

Patent

active

046331140

ABSTRACT:
Apparatus for retaining a coil in position with respect to a pole and electric motor, the pole forming a substantially rectangular shaped projection internally of the motor, having a width approximately the same dimension as the width of a central aperture of the coil through which the pole is to project, comprising a generally L-shaped member having one arm adapted for sliding into a space between a pole and the coil and a second arm bent to overlay a surface of the coil for pressing the coil against a frame of the motor. The pole is provided with a retention structure running longitudinally along each side such that the arm of the L-shaped member lying in the space between the pole and coil can grasp the retention structure so as to be retained in a fixed position. The L-shaped member is constructed of an elastic material which is deformed by insertion into the space between the pole and coil such that the spring action of the second arm of the L-shaped member is exerted against a surface of the coil to press it downward onto the pole. The ends of the L-shaped member are reverse curved in order to prevent the ends from damaging the insulation on the coil, and the edges and corners are rounded to minimize the opportunity for point discharge of high voltage.

REFERENCES:
patent: 1119988 (1914-12-01), Rapp
patent: 1300859 (1919-04-01), Nikonow
patent: 2709763 (1955-05-01), Opel
patent: 4210890 (1980-07-01), Olsen

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