ALUMINUM CLAD COPPER COMMUTATOR FOR USE WITH ALUMINUM ARMATURE WIRE

• US 3,668,449 A
• Filed: 10/13/1970
• Issued: 06/06/1972
• Est. Priority Date: 10/13/1970
• Status: Expired due to Term

• Current Assignee: John B. King
• Original Assignee: John B. King
• Inventors: King, John B.
• Primary Examiner(s): Trammell, James D.
• Assistant Examiner(s): Budd, Mark O.
• Application Number:
  US05/080,346
• Time in Patent Office: 602 Days
• Field of Search: 310/233-237 29/597,472.3
• US Class Current: 310/236
• CPC Class Codes: H01R 39/32 Connections of conductor to commutator segment
• CPC Class Codes: Y10T 29/49011 Commutator or slip ring assembly

Abstract

A new and improved electrical commutator comprising a plurality of spaced apart plates wherein said plates have at least one outwardly projecting finger for holding an armature wire and wherein the plates are copper and the finger is copper integrally bonded to a side of aluminum.

Claims

2. An electrical commutator in accordance with claim 1 wherein said copper is selected from the group consisting of L Oxygen Electrolytic Tough Pitch Copper, Electrolytic Tough Pitch Copper, and Oxygen Free High Conductivity Copper.

3. An electrical commutator in accordance with claim 2 wherein said aluminum is selected from the group consisting of A.A. 1100 E.C. grade aluminum.

4. An electrical commutator in accordance with claim 2 wherein said fingers project towards the opposing edges of said plates and substantially parallel the faces thereof.

5. An electrical commutator in accordance with claim 4 further including an armature wire positioned between said fingers and said faces and resistance welded to said fingers and said plates.

6. An electrical commutator in accordance with claim 2 wherein each of said plates has a single outwardly extending finger.

7. An electrical commutator in accordance with claim 6 wherein said composite is from 0.030 to 0.060 inches thick and wherein said aluminum and said plate is from 5 to 30 percent of the thickness and said finger.

8. An electrical commutator in accordance with claim 7 wherein said aluminum is about 10 percent of the thickness of said finger.

9. An electrical commutator in accordance with claim 5 wherein said copper contains as impurities 0.2 maximum oxygen, 0.03 percent maximum zinc, total all other impurities less than 0.03 percent nominal.