Patent US208890A successfully refreshed from Google Patents.
Patent US3914632A successfully refreshed from Google Patents.
US3914632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator for electric machines and method of making such a commutator
Assignee: Electrolux AB
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Filing: 1974-04-05
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Granted: 1975-10-21
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Expires: 1994-04-05
Abstract
Abstract A commutator for an electric machine, for example a motor, in which commutator segments are provided with bent-over hooks around which are looped electrically conductive rotor wires. Wedge-shaped cuts are made in the supporting cylinder for alternate commutator segments so that rotor wire ends connected to adjacent segments are located at different distances from the rotary shaft of the commutator.
Inventors
- 👤 Olle Nylen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:47
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/32
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
130 words
A commutator for an electrically operated device comprising an electrically non-conductive cylindrically shaped body provided with a substantially centrally located thorough hole, a plurality of even numbered electricallY conductive segments each being adapted to be secured to a corresponding end of a rotor wire, said segments being arranged circumferentially on said body, one of the ends of each of the conductive segments being provided with means for attaching the respective rotor wire thereto, a wedge-shaped cut being provided under every other attachment means whereby each attachment means over the wedge-shaped cut is bent backward to a position in which it is located at a shorter distance from said through hole of the commutator than the adjacent attachments means to thereby substantially eliminate the possibility of short-circuiting between adjacent attachment means.
Claim 2
Dependent Claim
130 words
A commutator for an electrically operated device comprising an electrically non-conductive cylindrically shaped body provided with a substantially centrally located thorough hole, a plurality of even numbered electricallY conductive segments each being adapted to be secured to a corresponding end of a rotor wire, said segments being arranged circumferentially on said body, one of the ends of each of the conductive segments being provided with means for attaching the respective rotor wire thereto, a wedge-shaped cut being provided under every other attachment means whereby each attachment means over the wedge-shaped cut is bent backward to a position in which it is located at a shorter distance from said through hole of the commutator than the adjacent attachments means to thereby substantially eliminate the possibility of short-circuiting between adjacent attachment means.
Claim 3
Dependent Claim
15 words
A commutator as claimed in claim 1 wherein each attachment means in a hook-shaped member.
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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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |