Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1993-10-13
1995-12-05
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310220, 310233, H02K 1314
Patent
active
054732123
ABSTRACT:
A varistor disk assembly for mounting to a commutator base comprising a non-conductive retaining ring, a conductive member, and a varistor disk interposed between the commutator base and the distal end of the retaining ring. The retaining ring has an axial bore therethrough providing a friction fit with the motor shaft on which the commutator is mounted. A tolerance absorbing member can be interposed between the varistor disk and the retaining ring. The conductive member conducts current through its thickness from the commutator base to the varistor disk, but does not conduct current between adjacent commutator segments. To orient the varistor disk to the commutator, the proximal end of the retaining ring can have at least one planar side formed in its periphery for alignment with one of the commutator segments, while the distal end of the retaining ring also has formed in its periphery a planar side, and the varistor disk is provided with a complementary planar side in its inner diameter. Alternatively, the phenolic base of the commutator can be extended and molded with at least one planar side, which preferably is in alignment with one of the commutator segments, while the varistor disk is provided with a complementary planar side in its inner diameter.
REFERENCES:
patent: 2470096 (1949-05-01), Eck
patent: 3594598 (1971-07-01), Schaub
patent: 4833357 (1989-05-01), Tamura
patent: 4859893 (1989-08-01), Wang
patent: 5008577 (1991-04-01), Wang
patent: 5095239 (1992-03-01), Wang
patent: 5293092 (1994-03-01), Strobl
Crook James C.
Holden John R.
Marvin Murray J.
McMillan, Sr. James E.
Welterlin Raymond E.
Buehler Products, Inc.
Skudy R.
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