US3771092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contactless switching device
Assignee: Siemens AG
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Filing: 1971-11-22
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Granted: 1973-11-06
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Expires: 1991-11-22
Abstract
Abstract A contactless switching device has a permanent magnet which is rotatably mounted so that it is movable relative to a magnetic field dependent resistance which is located between the return poles of a return yoke. The permanent magnet is rotatably mounted in the manner of a rotatably mounted coil between the return poles of the return yoke and is magnetized in a diameter of the circle of rotation. Rotation of the permanent magnet varies the component of the magnetic field effective via the return poles between a maximum and substantially zero.
Inventors
- 👤 K Greger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:53
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/90
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
117 words
A contactless switching device comprising a return yoke having a pair of return poles, a magnetic field dependent resistance located in the return yoke between the return poles thereof and a permanent magnet having an axis of rotation and rotatably mounted in the return yoke for movement relative to the magnetic field dependent resistance in directions transverse to the axis of magnetization of said magnet, said magnet being rotatably mounted in the manner of a rotatably mounted coil between the return poles of the yoke and being magnetized along a diameter, said magnetic field dependent resistance being disposed in a plane extending in substantially the same direction as the axis of rotation of said rotatable permanent magnet.
Claim 2
Dependent Claim
117 words
A contactless switching device comprising a return yoke having a pair of return poles, a magnetic field dependent resistance located in the return yoke between the return poles thereof and a permanent magnet having an axis of rotation and rotatably mounted in the return yoke for movement relative to the magnetic field dependent resistance in directions transverse to the axis of magnetization of said magnet, said magnet being rotatably mounted in the manner of a rotatably mounted coil between the return poles of the yoke and being magnetized along a diameter, said magnetic field dependent resistance being disposed in a plane extending in substantially the same direction as the axis of rotation of said rotatable permanent magnet.
Claim 3
Dependent Claim
16 words
A contactless switching device as claimed in claim 1, wherein the permanent magnet is a cylinder.
Claim 4
Dependent Claim
68 words
A contactless switching device as claimed in claim 2, wherein the permanent magnet has opposite end faces and the return poles of the return yoke comprise a substantially U-shaped configuration having a back and extending in the direction of the axis of the permanent magnet and the magnetic field dependent resistance is located in the back of the U-shaped configuration adjacent one end face of the permanent magnet.
Claim 5
Dependent Claim
29 words
A contactless switching device as claimed in claim 5, wherein the return poles of the yoke have pole shoe pieces in the area of the magnetic field dependent resistance.
Claim 6
Dependent Claim
29 words
A contactless switching device as claimed in claim 3, wherein the angular range of the circle of rotation covered by the return poles of the yoke totals approximately 150*.
Claim 7
Dependent Claim
36 words
A contactless switching device as claimed in claim 3, wherein the permanent magnet has a surface and the return poles of the yoke contact the surface of the permanent magnet and the magnetic field dependent resistance.
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |