Magnetic switch for operating a circuit

• US 8,471,658 B2
• Filed: 05/06/2012
• Issued: 06/25/2013
• 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:
  US13/465,001
• Publication Number:
  US 20120218064A1
• Time in Patent Office: 415 Days
• Field of Search: 335205-207, 200/404
• US Class Current: 335/205
• 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 correlated magnetic system and method for using the same are described herein. A wide-range of devices including a retractable magnet assembly, a disengagement/engagement tool, a click on-click off device are described herein that may incorporate or interact with one or more of the multilevel correlated magnetic systems.

Claims

1. A magnetic switch for operating a circuit, comprising:

a multi-level magnetic system, comprising;

a first magnetic structure; and

a second magnetic structure, said first and second magnetic structures producing a first force;

a first contact attached to the circuit;

a second contact attached to said second magnetic structure and attached to said circuit, said second contact being movable relative to said first contact to open and close said circuit;

said second magnetic structure being configured to move from a first position to a second position when a second force is applied thereto, said first position corresponding to an open state of said circuit where said first and second contacts are open, said second position corresponding to a closed state of said circuit where said first and second contacts are closed wherein said multi-level magnetic-system is configured to maintain at least a minimum separation distance between said first and second magnetic structures; and

wherein said minimum separation distance is between a first separation distance at which said first force achieves a peak repel force and a second separation distance at which said first force transitions to an attract force.

2. The magnetic switch of claim 1, further comprising:

a movement constraining structure that constrains movement of at least one of said first magnetic structure or said second magnetic structure.

3. The magnetic switch of claim 2, wherein said movement constraining structure is configured to constrain rotational movement.

4. The magnetic switch of claim 2, wherein said movement constraining structure is configured to constrain translational movement.

5. The magnetic switch of claim 1, wherein said multi-level magnetic system is configured to allow movement of at least one of said first magnetic structure or said second magnetic structure that varies a composite force curve associated with the first and second magnetic structures.

6. The magnetic switch of claim 1, wherein said first force becomes a net attractive force when said second magnetic structure moves to said second position.

7. The magnetic switch of claim 1, wherein said first force is a net repulsive force when said second magnetic structure moves to said second position.

8. The magnetic switch of claim 1, wherein said second magnetic structure moves from said second position to said first position when said second force is no longer applied to said second magnetic structure.

9. The magnetic switch of claim 1, wherein said first force is substantially a zero force when said second magnetic structure is at said second position.

10. The magnetic switch of claim 1, wherein said circuit is an electrical circuit.

11. The magnetic switch of claim 1, further comprising:

an object that is interfaced with said second magnetic structure, said object receiving a third force, said object and said second magnetic structure producing said second force.

12. The magnetic switch of claim 11, wherein said third force is applied by an automated equipment.

13. The magnetic switch of claim 11, wherein said object comprises a third magnetic structure.

14. The magnetic switch of claim 13, wherein said second and third magnetic structures are conventional dipole magnets in a repel orientation.

15. The magnetic switch of claim 13, wherein said second and third magnetic structures function as a contactless attachment multi-level magnetic system.

16. The magnetic switch of claim 1, wherein said multi-level magnetic structure is a repel-snap multi-level magnetic structure.

17. The magnetic switch of claim 16, further comprising:

a contactless attachment multi-level magnetic system that receives a third force and produces said second force.

18. The magnetic switch of claim 17, wherein said contactless attachment multi-level magnetic system and said repel-snap multi-level magnetic system both comprise said second magnetic structure.

19. The magnetic switch of claim 17, wherein said contactless attachment multi-level magnetic system comprises a third magnetic structure and a fourth magnetic structure.