Patent US4274022A successfully refreshed from Google Patents.
US4274022A
Expired / Lapsed
US
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Evacuating device for generating an insulating vacuum around the superconducting winding of a rotor
Assignee: Siemens AG
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Filing: 1979-05-16
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Granted: 1981-06-16
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Expires: 1999-05-16
Abstract
Abstract An evacuating device for generating an insulating vaccum around the superconducting winding of the rotor of an electric machine with an inner space which is surrounded by the winding and is permeated by the magnetic field of the winding in which a co-rotating ionization getter pump operating according to the sputter principle is diposed in the inner space and has at least two electrodes arranged perpendicular with respect the magnetic field eliminating the need for rotating sealing elements at a terminal head of the rotor.
Inventors
- 👤 Werner Elsel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:34
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/12; H01J41/18; H01J41/20; H02; H02K; H02K55/00; H02K55/02; H02K55/04; H02K9/00; H02K9/19; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/876; Y10S505/877
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
In an evacuating device for generating an insulating vacuum around the superconducting winding of the rotor of an electric machine with an inner space which is defined at its inner circumference by a support cylinder and is surrounded by the winding and is permeated by the magnetic field of the winding, comprising at least one ion getter pump operating according to the sputter principle, disposed in the inner space coupled to the support cylinder so as to co-rotate with the rotor, said pump having at least one anode electrode and at least a cathode electrode arranged at least approximately perpendicular with respect to the magnetic field in said space.
Claim 2
Dependent Claim
109 words
In an evacuating device for generating an insulating vacuum around the superconducting winding of the rotor of an electric machine with an inner space which is defined at its inner circumference by a support cylinder and is surrounded by the winding and is permeated by the magnetic field of the winding, comprising at least one ion getter pump operating according to the sputter principle, disposed in the inner space coupled to the support cylinder so as to co-rotate with the rotor, said pump having at least one anode electrode and at least a cathode electrode arranged at least approximately perpendicular with respect to the magnetic field in said space.
Claim 3
Dependent Claim
17 words
An evacuating device according to claim 1, wherein said electrodes have, at least approximately, symmetry of revolution.
Claim 4
Dependent Claim
21 words
An evacuating device according to claim 2, wherein said electrodes are arranged concentric to the axis of rotation of the rotor.
Claim 5
Dependent Claim
15 words
An evacuating device according to claim 1 wherein said anode electrode has a cellular structure.
Claim 6
Dependent Claim
20 words
An evacuating device according claim 1 wherein said cathode electrode has a surface facing the anode electrode which is serrated.
Claim 7
Dependent Claim
25 words
An evacuating device according to claim 1 wherein two cathode electrodes are disposed parallel to each of the two flat sides of an anode electrode.
References Cited (Backward Citations)
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US3781133A
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US3994625A
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US4096403A
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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) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |