Multilevel correlated magnetic system

• US 9,111,672 B2
• Filed: 12/20/2014
• Issued: 08/18/2015
• Est. Priority Date: 07/12/2010
• Status: Expired due to Fees

• Current Assignee: Correlated Magnetics Research, LLC
• Original Assignee: Correlated Magnetics Research, LLC
• Inventors: Fullerton, Larry W., Roberts, Mark D.
• Primary Examiner(s): BARRERA, RAMON M
• Application Number:
  US14/578,349
• Publication Number:
  US 20150102880A1
• Time in Patent Office: 241 Days
• US Class Current: 1/1
• CPC Class Codes: E05B 65/006 for covers or panels for manholes E02D29/1427; for holes enabling access to installations in buildings E04F19/08; for pressure vessels F16J13/00
• CPC Class Codes: E05C 19/16 Devices holding the wing by magnetic or electromagnetic attraction E05C17/56 takes precedence
• CPC Class Codes: G06F 1/1616 with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
• CPC Class Codes: G06F 1/1677 for detecting open or closed state or particular intermediate positions assumed by movable parts of the enclosure, e.g. detection of display lid position with respect to main body in a laptop, detection of opening of the cover of battery compartment
• CPC Class Codes: G06F 1/1679 for locking or maintaining the movable parts of the enclosure in a fixed position, e.g. latching mechanism at the edge of the display in a laptop or for the screen protective cover of a PDA G06F1/1681 takes precedence
• CPC Class Codes: H01F 7/02 Permanent magnets [PM]
• CPC Class Codes: H01F 7/021 Construction of PM H01F7/0278 takes precedence; PM compositions H01F1/032
• CPC Class Codes: H01F 7/0231 Magnetic circuits with PM for power or force generation
• CPC Class Codes: H01F 7/0242 Magnetic drives, magnetic coupling devices
• CPC Class Codes: H01F 7/0252 PM holding devices H01F7/021, H01F7/0215, H01F7/0226 take precedence
• CPC Class Codes: H01F 7/0263 Closures, bags, bands, engagement devices with male and female parts
• CPC Class Codes: H01F 7/20 without armatures cores H01F3/00; coils H01F5/00 ; shaping metal by applying magnetic forces B21D26/14; electromagnets specially adapted for NMR applications G01R33/381

Abstract

A multilevel magnetic system described herein includes first and second magnetic structures that produce a net force that transitions from an attract force to a repel force as a separation distance between the first and second magnetic structures increases. The multi-level magnetic system is configured to maintain a minimum separation distance between a transition distance where the net force is zero and a separation distance at which a peak repel force is produced.

Claims

1. A multilevel correlated magnetic system, comprising:

a first correlated magnetic structure including a first portion which has a plurality of coded magnetic sources and a second portion which has one or more magnetic sources;

a second correlated magnetic structure including a first portion which has a plurality of anti-complementary coded magnetic sources and a second portion which has one or more magnetic sources;

wherein the first correlated magnetic structure is aligned with the second correlated magnetic structure such that the first portions and the second portions are respectively located across from one another; and

a tool that applies a bias magnet field to cause a transition of the first and second magnetic structures from a closed state in which the first and second magnetic structures are attached to an open state in which the first and second magnetic structures are separated.

2. The multilevel correlated magnetic system of claim 1, wherein the tool further applies another bias magnet field to cause a transition of the first and second magnetic structures from the open state to the closed state.

3. The multilevel correlated magnetic system of claim 1, the tool comprises one or more permanent magnets.

4. The multilevel correlated magnetic system of claim 1, the tool comprises one or more electromagnets.

5. The multilevel correlated magnetic system of claim 1, the tool applies a coded bias field so that the tool function will function only when in a desired orientation with the first and second magnetic structures.

6. The multilevel correlated magnetic system of claim 1, wherein the first portions produce a repel magnetic force and the second portions produce an attractive magnetic force such that (1) the first and second correlated magnetic structures repel one another when separated by a distance greater than a transition distance, (2) the first and second correlated magnetic structures neither repel or attract one another when separated by a distance equal to the transition distance, and (3) the first and second correlated magnetic structures attract one another when separated by a distance less than the transition distance.

7. The multilevel correlated magnetic system of claim 1, wherein the second portions each produce a higher peak force than the first portions while the second portions each have a faster field extinction rate than the first portions such that (1) the second portions produce a magnetic force that is cancelled by a magnetic force produced by the first portions when the first and second correlated magnetic structures are separated by a distance equal to the transition distance, (2) the second portions produce a stronger magnetic force than the magnetic force produced by the first portions when the first and second correlated magnetic structures have a separation distance from one another that is less than the transition distance, and (3) the second portions have a weaker magnetic force than the magnetic force produced by first portions when the separation distance between the first and second correlated magnetic structures is greater than the transition distance.

8. The multilevel correlated magnetic system of claim 7, wherein the first and second correlated magnetic structures are snapped together when separated by the distance less than the transition distance then if one of the first or second correlated magnetic structures are turned relative to the other then the first and second correlated magnetic structures repel one another.

9. The multilevel correlated magnetic system of claim 1, further comprising one or more movement constraining structures which attach the first correlated magnetic structure to the second correlated magnetic structure such that the one or more movement constraining structures only allow the first and second correlated magnetic structures to move towards and away from one another while ensuring the first and second correlated magnetic structures are parallel to each other.

10. The multilevel correlated magnetic system of claim 1, further comprising a spacer attached to the first correlated magnetic structure or the second correlated magnetic structure to prevent the first correlated magnetic structure from completely contacting the second correlated magnetic structure.

11. The multilevel correlated magnetic system of claim 1, wherein:

the first correlated magnetic structure comprises the first portion, the second portion, and a third portion, wherein the third portion has a plurality of coded magnetic sources;

the second correlated magnetic structure comprises the first portion, the second portion, and a third portion, wherein the third portion has a plurality of coded magnetic sources; and

wherein the first correlated magnetic structure is aligned with the second correlated magnetic structure such that the first portions, the second portions, and the third portions are respectively located across from one another.

12. The multilevel correlated magnetic system of claim 1, wherein the second portion of the first correlated magnetic structure comprises a plurality of coded magnetic sources, and the second portion of the second correlated magnetic structure comprises a plurality of complementary coded magnetic sources.

13. The multilevel correlated magnetic system of claim 1, wherein the plurality of coded magnetic sources comprises first field emission sources and the plurality of anti-complementary coded magnetic sources comprises second field emission sources, each field emission sources having positions and polarities relating to a desired spatial force function that corresponds to a relative alignment of the first and second correlated magnetic structures within a field domain, wherein the spatial force function being in accordance with a code, where the code corresponding to a code modulo of the first field emission sources and an anti-complementary code modulo of the second field emission sources.

14. The multilevel correlated magnetic system of claim 13, wherein the code defines a peak spatial force corresponding to a substantial alignment of the code modulo of the first field emission sources with the anti-complementary code modulo of the second field emission sources, wherein the code also defines a plurality of off peak spatial forces corresponding to a plurality of different misalignments of the code modulo of the first field emission sources and the anti-complementary code modulo of the second field emission sources, wherein the plurality of off peak spatial forces have a largest off peak spatial force, where the largest off peak spatial force is less than half of the peak spatial force.

15. The multilevel correlated magnetic system of claim 13, wherein said positions and said polarities of each of said field emission sources are determined in accordance with at least one correlation function.

16. The multilevel correlated magnetic system of claim 15, wherein said at least one correlation function is in accordance with the code.

17. The multilevel correlated magnetic system of claim 16, wherein said code is one of a pseudorandom code, a deterministic code, or a designed code.

18. The multilevel correlated magnetic system of claim 16, wherein said code is one of a one dimensional code, a two dimensional code, a three dimensional code, or a four dimensional code.

19. The multilevel correlated magnetic system of claim 13, wherein each of said field emission sources has a corresponding field emission amplitude and vector direction determined in accordance with the desired spatial force function, wherein a separation distance between the first and second magnetic field emission structures and relative alignment of the first and second correlated magnetic structures creates a spatial force in accordance with the desired spatial force function.

20. The multilevel correlated magnetic system of claim 19, wherein said spatial force comprises at least one of an attractive spatial force or a repellant spatial force.

21. The multilevel correlated magnetic system of claim 13, wherein said field domain corresponds to first magnetic field emissions from said field emission sources of said first field emission structure interacting with second magnetic field emissions from said second field emission sources of said second magnetic field emission structure.

22. The multilevel correlated magnetic system of claim 13, wherein said polarities of the field emission sources comprises at least one of North-South polarities or positive-negative polarities.

23. The multilevel correlated magnetic system of claim 13, wherein at least one of said field emission sources comprises a magnetic field emission source or an electric field emission source.

24. The multilevel correlated magnetic system of claim 13, wherein at least one of said field emission sources comprises a permanent magnet, an electromagnet, an electret, a magnetized ferromagnetic material, a portion of a magnetized ferromagnetic material, a soft magnetic material, or a superconductive magnetic material.