US3842301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slip ring assemblies for rotary electric machines
Assignee: Lucas Electrical Co Ltd
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Filing: 1973-12-28
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Granted: 1974-10-15
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Expires: 1993-12-28
Abstract
Abstract A slip ring assembly for a rotary electric machine includes a body of electrically insulating material and a pair of slip rings carried on the body in spaced relationship. The body is formed with an axial bore which in use receives one end of the rotor shaft of the rotary electric machine. A pair of resilient arms extend from the body, and coact with the rotor shaft in use to lock the slip ring assembly to the rotor shaft.
Inventors
- 👤 R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:27
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
68 words
A slip ring assembly for a rotary electric machine, comprising an electrically insulating body, a pair of slip rings carried on the body, in spaced relationship, said body having an axial bore therein adapted to receive one end of a rotor shaft of a rotary electric machine, and resilient clip means carried by said body and adapted to engage, in use, behind a shoulder on said rotor shaft.
Claim 2
Dependent Claim
68 words
A slip ring assembly for a rotary electric machine, comprising an electrically insulating body, a pair of slip rings carried on the body, in spaced relationship, said body having an axial bore therein adapted to receive one end of a rotor shaft of a rotary electric machine, and resilient clip means carried by said body and adapted to engage, in use, behind a shoulder on said rotor shaft.
Claim 3
Dependent Claim
40 words
A slip ring assembly as claimed in claim 1 wherein said resilient clip means comprises a pair of angularly spaced, resilient extensions projecting from said body substantially parallel to the longitudinal axis thereof, and provided with inwardly facing projections thereon.
Claim 4
Dependent Claim
69 words
A slip ring assembly as claimed in claim 1 wherein said resilient clip means comprises a pair of angularly spaced extensions projecting from the body substantially parallel to the longitudinal axis thereof, and having grooves in their radially outermost surfaces, and, a resilient ring mounted in said grooves so that portions of the resilient ring extending between said extensions engage, in use, behind said shoulder of said rotor shaft.
Claim 5
Dependent Claim
31 words
A slip ring assembly as claimed in claim 1 wherein an inwardly projecting shoulder in the bore limits insertion of one end of said rotor shaft, in use, into the bore.
Claim 6
Dependent Claim
42 words
A slip ring assembly as claimed in claim 4 wherein said inwardly projecting shoulder is of frusto-conical form, engageable in use, by a corresponding frusto-conical formation on said rotor shaft whereby the slip ring assembly is self centering on the rotor shaft.
Claim 7
Dependent Claim
21 words
A slip ring assembly as claimed in claim 1 wherein the slip rings are an intereference fit on the insulating body.
Claim 8
Dependent Claim
26 words
A slip ring assembly as claimed in claim 1 wherein the slip rings are secured to the body by moulding the body within the slip rings.
Claim 9
Dependent Claim
49 words
A rotor shaft arrangement for a rotary electric machine comprising a rotor shaft, and a slip ring assembly as claimed in claim 1, the resilient clip means of the slip ring assembly being engaged with a shoulder on the shaft to hold the slip ring assembly on the shaft.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |