Metal working – Method of mechanical manufacture – Electrical device making
Patent
1979-01-11
1981-01-13
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
310 42, 310 83, 310 89, H02K 1514
Patent
active
042440998
ABSTRACT:
An electric motor and method of making the motor, in which a unitary one-piece cylindrical housing is molded of nonmagnetic material with an H-shaped axial cross-section to provide cylindrical recesses in opposite ends of the housing. A gear train is inserted in one of these recesses, and a rotor assembly and a centrally orificed stator are inserted in the other recess. The stator is in the form of a sub-assembly having a plurality of annular pole pieces stacked in oppositely disposed relationship with each other. Each of these pole pieces has only a single salient stator pole projecting perpendicularly from adjacent the margin of the stator orifice, and the pole pieces are stacked such that the stator poles project in opposite directions and are arranged in diametrically opposed pairs to form a cylindrical array. Two of the pole pieces are provided with peripheral flanges to form a cylindrical enclosure for the energizing winding of the motor. The rotor assembly is located within the central orifice of the stator and includes a stationary nonmagnetic cover, a nonsalient pole rotor within the cover, and a rotor shaft which extends into the cylindrical recess for the gear train.
REFERENCES:
patent: 1614031 (1927-01-01), Holmes
patent: 1651995 (1927-12-01), Casey
patent: 2171987 (1939-09-01), Poole
patent: 3153158 (1964-10-01), Schmitter
patent: 3475630 (1969-10-01), Heinzen et al.
patent: 3495113 (1970-02-01), Haydon
patent: 3564314 (1971-02-01), Haydon
patent: 4087709 (1978-05-01), Hayden
Hall Carl E.
Robinson, Jr. Lee C.
Tri-tech, Inc.
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