US3726003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a disk tape commutator
Assignee: Motors Liquidation Co
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Filing: 1971-08-05
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Granted: 1973-04-10
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Expires: 1991-08-05
Abstract
Abstract A disk type commutator for a direct current motor comprising a plurality of wedge-shaped conductive members carried by an annular insulating member that provide commutator segments for the commutator. The conductive members and the insulating member have aligned apertures through which the ends of the rotor windings are inserted for connection with the conductive members at the face of the commutator. The face of the commutator is machined to provide a surface that engages the motor brushes. Both the conductive members and the rotor winding ends contact the motor brushes in operation.
Inventors
- 👤 J Hellmann
- 👤 C Richwine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:02
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/32; H01R43/00; H01R43/06; H01R43/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49011
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
235 words
A method of manufacturing a disk type commutator for a rotor of a dynamoelectric machine, the steps comprising, providing a strip of electrically conductive material, cutting said material to form a plurality of wedge-shaped commutator segments connected by thin connecting portions located along one edge of said strip, forming a conductor receiving opening in each commutator segment by cutting and forcing out two adjacent portions of each segment to form a pair of integral anchoring tabs extending axially from said segments, folding said strip into a circular configuration with the edges of said segments spaced from each other and with said one edge of said strip located at the outer periphery, molding a quantity of insulating material to the side of said folded strip having said integral anchoring tabs and during said molding forming a plurality of conductor receiving openings in said insulating material aligned with the openings in said segments, said openings formed in said insulating material being substantially the same size as said openings formed in said segments, said molding material being molded to said anchoring tabs whereby an annular insulator is formed which is connected to said segments and which has openings aligned with the openings in said segments, and removing said connecting portions to form insulated commutator segments, said aligned openings in said segments and annular insulator adapted to receive axially extending rotor conductors which are electrically connected to said segments.
Claim 2
Independent Claim
235 words
A method of manufacturing a disk type commutator for a rotor of a dynamoelectric machine, the steps comprising, providing a strip of electrically conductive material, cutting said material to form a plurality of wedge-shaped commutator segments connected by thin connecting portions located along one edge of said strip, forming a conductor receiving opening in each commutator segment by cutting and forcing out two adjacent portions of each segment to form a pair of integral anchoring tabs extending axially from said segments, folding said strip into a circular configuration with the edges of said segments spaced from each other and with said one edge of said strip located at the outer periphery, molding a quantity of insulating material to the side of said folded strip having said integral anchoring tabs and during said molding forming a plurality of conductor receiving openings in said insulating material aligned with the openings in said segments, said openings formed in said insulating material being substantially the same size as said openings formed in said segments, said molding material being molded to said anchoring tabs whereby an annular insulator is formed which is connected to said segments and which has openings aligned with the openings in said segments, and removing said connecting portions to form insulated commutator segments, said aligned openings in said segments and annular insulator adapted to receive axially extending rotor conductors which are electrically connected to said segments.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |