Patent US3597714A successfully refreshed from Google Patents.
US3597714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic rotary switch
Assignee: Individual
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Filing: 1970-04-15
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Granted: 1971-08-03
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Expires: 1990-04-15
Abstract
Abstract Snap acting magnetic rotary switch having a plurality of switches, each of which comprising two fixed contacts and one movable contact, a permanent magnet being fast with the latter. The switch also comprises two annularly shaped permanent magnets adjacent each other and the magnets fast with said movable contacts, the annular magnet outwardly positioned being fixed and having as many pairs of poles as the switches and as many pairs of poles being provided on the adjacent surface of the intermediate annular magnet which is fast with a rotary shaft. On the surface of the intermediate annular magnet facing the magnets fast with the movable contacts three ring-shaped poles are provided, the sign of which being alternately different; one of these poles is interrupted at a location and the other two poles are deformed to this location. Upon rotation of said shaft, the switch contacts are snap opened or closed with a speed independent of the speed of rotation of said shaft.
Inventors
- 👤 Federico Visconti Brebbia
- 👤 Giorgio Visconti Brebbia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:34
CPC Classifications
H; H01; H01H; H01H36/00; H01H36/0073; H01H5/00; H01H5/02; H01H3/00; H01H3/32; H01H3/50; H01H2003/506
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
249 words
A rotary magnetic switch comprising a plurality of switches circumferentially mounted on a rigid body and each having two fixed contacts and a movable contact therebetween, a permanent magnet fast with said movable contact and having a magnetized sector-shaped surface thereof with at least two poles aligned with said fixed contacts, a first annular permanent magnet fast with said rigid body and having as many pairs of lateral magnetization poles as the switches, and a shaft carrying a second rotary permanent magnet annularly shaped and interposed between said first permanent magnet and the permanent magnets fast with said movable contacts, wherein on its surface opposite the adjacent surface of the first permanent magnet said second permanent magnet has as many pairs of lateral magnetization poles as the switches, the cross section of the surface of the second permanent magnet opposite the permanent magnets fast with said movable contacts is of a sector shape conjugated to the sector shape of the permanent magnets fast with the movable contacts and has at least three lateral magnetization poles substantially in the form of three rings, the intermediate ring of which is one pole and the two rings located sidewise thereto are the other fractional pole, at least at a location one of the sidewise located ring-shaped poles being interrupted and the other ringshaped poles being deformed to the interruption location of said pole forming a recess accommodating a lateral magnetization pole of opposite sign to that of the ring-shaped pole adjacent thereto.
Claim 2
Dependent Claim
249 words
A rotary magnetic switch comprising a plurality of switches circumferentially mounted on a rigid body and each having two fixed contacts and a movable contact therebetween, a permanent magnet fast with said movable contact and having a magnetized sector-shaped surface thereof with at least two poles aligned with said fixed contacts, a first annular permanent magnet fast with said rigid body and having as many pairs of lateral magnetization poles as the switches, and a shaft carrying a second rotary permanent magnet annularly shaped and interposed between said first permanent magnet and the permanent magnets fast with said movable contacts, wherein on its surface opposite the adjacent surface of the first permanent magnet said second permanent magnet has as many pairs of lateral magnetization poles as the switches, the cross section of the surface of the second permanent magnet opposite the permanent magnets fast with said movable contacts is of a sector shape conjugated to the sector shape of the permanent magnets fast with the movable contacts and has at least three lateral magnetization poles substantially in the form of three rings, the intermediate ring of which is one pole and the two rings located sidewise thereto are the other fractional pole, at least at a location one of the sidewise located ring-shaped poles being interrupted and the other ringshaped poles being deformed to the interruption location of said pole forming a recess accommodating a lateral magnetization pole of opposite sign to that of the ring-shaped pole adjacent thereto.
Claim 3
Dependent Claim
43 words
A rotary magnetic switch according to claim 1, wherein said first and second annularly shaped permanent magnets comprise discs parallel to one another wherein said pole pairs are radially arranged and said ring-shaped poles are concentric and of diameters different from one another.
Claim 4
Dependent Claim
53 words
A rotary magnetic switch according to claim 1, wherein said first magnetic switch forms a stator portion for a stepping motor, said second permanent magnet is a cylindrical tubular body forming part of the rotor for said stepping motor and said ring-shaped poles are coaxial and of diameters substantially identical to one another.
References Cited (Backward Citations)
US3325756A
Cited
US3458840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |