David J Cummings

US Patent:

50685635, Nov 26, 1991

Filed:

Oct 9, 1990

Appl. No.:

7/594727

Inventors:

David H. Cummings - Waukesha WI

Assignee:

Milwaukee Electric Tool Corporation - Brookfield WI

International Classification:

H02K 122

US Classification:

310261

Abstract:

The invention provides an insulator for insertion in an armature core slot of a motor and for preventing an electrical connection between the core and wire wound in the armature core slots. The insulator includes, when it is mounted in an armature core slot, a first end aligned with an end of the core that faces a commutator included in the armature, and a second end aligned with the opposite end of the core. The insulator further includes a tab extending from the second end of the insulator. The tab is bent to prevent movement of the insulator in the slot and toward the commutator. The insulator optionally includes another tab extending from the first end of the insulator. The optional tab is bent to prevent movement of the insulator in the slot and away from the commutator.

US Patent:

49821245, Jan 1, 1991

Filed:

Jan 19, 1990

Appl. No.:

7/467665

Inventors:

David H. Cummings - Waukesha WI
David A. Selby - Delafield WI

Assignee:

Milwaukee Electric Tool Corporation - Brookfield WI

International Classification:

H02K 350

US Classification:

310 71

Abstract:

The stator is made of laminated stampings having congruent outlines defining the central opening for a rotor and also defining pole pieces which include horn-like portions spaced from the main body of the stamping to define winding slots for the coil. Each end of the assembly has a terminal board which has an outline generally congruent with the laminations. Two terminals are mounted in the supports carried by the terminal board adjacent each pole piece. The ends of the wire of each coil are led across the adjacent terminal, then back between the terminal and a tang formed from the terminal. Then the tang is pressed against the terminal and wire, and fused to complete the connection.