US4092569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple armature permanent magnet motor/actuators
Assignee: Singer Co
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Filing: 1976-09-07
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Granted: 1978-05-30
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Expires: 1996-09-07
Abstract
Abstract This disclosure relates to electric motor/actuators and in particular to an electric motor/actuator including multiple non-magnetic armatures having commutated windings rotatable in a single air gap formed between opposing permanent magnets having their opposed polarized poles facing said armatures and wherein individual ones of said armatures are capable of different output functions from others of said armatures.
Inventors
- 👤 John Addison Herr
- 👤 Wolfgang Jaffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:46
CPC Classifications
H; H02; H02K; H02K16/00; D; D05; D05B; D05B19/00; D05B19/02; D05B27/00; D05B27/02; D05B69/00; D05B69/10; D05B69/12; H02K99/00; H02K99/20; D05D; D05D2207/00; D05D2207/05; D05D2207/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
An electric motor having a frame of magnetic material, said frame including opposed top and bottom walls, permanent magnet means secured to the inner peripheral surface of said walls in opposing polar relationship and defining a single air gap therebetween, and a plurality of solid non-magnetic armatures disposed within said single air gap and within the confines of said opposed top and bottom walls.
Claim 2
Dependent Claim
64 words
An electric motor having a frame of magnetic material, said frame including opposed top and bottom walls, permanent magnet means secured to the inner peripheral surface of said walls in opposing polar relationship and defining a single air gap therebetween, and a plurality of solid non-magnetic armatures disposed within said single air gap and within the confines of said opposed top and bottom walls.
Claim 3
Dependent Claim
46 words
An electric motor as recited in claim 1 wherein said frame includes a pair of opposing side walls and said magnet means terminating short of the length of said top and bottom walls to thereby leave a gap between said magnet means and said side walls.
Claim 4
Dependent Claim
34 words
An electric motor as recited in claim 2 wherein the gap defined between said magnet means and said side walls is equal to at least one half the distance of said single air gap.
Claim 5
Dependent Claim
20 words
An electric motor as recited in claim 1 wherein each of said solid non-magnetic armatures is provided with commutated windings.
Claim 6
Dependent Claim
18 words
An electric motor as recited in claim 1 wherein said permanent magnet means are formed from rare-earth alloys.
Claim 7
Dependent Claim
54 words
An electric motor as recited in claim 1 wherein at least one of said armatures is provided with sets of windings thereon, one of said sets being directly connected to a one side of a source of voltage and another of said sets being connected to the other side of a source of voltage.
Claim 8
Dependent Claim
29 words
An electric motor as recited in claim 6 further comprising control means including means for selectively reversing the polarity of said source of voltage to said sets of windings.
Claim 9
Dependent Claim
53 words
An electric motor as recited in claim 7 wherein said one armature is provided with a rotor shaft and potentiometer means connected to said shaft and being operatively connected with said control means to provide positional feedback signals thereto for modifying the magnitude of the source of voltage to said sets of windings.
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) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |