Field emission system and method

• US 8,410,882 B2
• Filed: 05/14/2012
• Issued: 04/02/2013
• Est. Priority Date: 04/04/2008
• Status: Expired due to Fees

• Current Assignee: Correlated Magnetics Research, LLC
• Original Assignee: Correlated Magnetics Research, LLC
• Inventors: Fullerton, Larry W., Roberts, Mark D., Richards, James L.
• Primary Examiner(s): BARRERA, RAMON M
• Application Number:
  US13/471,172
• Publication Number:
  US 20120286912A1
• Time in Patent Office: 323 Days
• Field of Search: 335/285, 335302-306, 243/03
• US Class Current: 335/285
• CPC Class Codes: G01D 18/00 Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
• CPC Class Codes: H01F 1/01 of inorganic materials H01F1/44 takes precedence
• CPC Class Codes: H01F 13/003 Methods and devices for magnetising permanent magnets permanent magnets H01F7/02
• 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 7/0242 Magnetic drives, magnetic coupling devices
• CPC Class Codes: H01F 7/0247 Orientating, locating, transporting arrangements
• CPC Class Codes: H01F 7/0252 PM holding devices H01F7/021, H01F7/0215, H01F7/0226 take precedence
• CPC Class Codes: H01F 7/0284 using a trimmable or adjustable magnetic circuit, e.g. for a symmetric dipole or quadrupole magnetic field
• CPC Class Codes: H02K 15/03 having permanent magnets
• CPC Class Codes: H02K 49/10 of the permanent-magnet type
• CPC Class Codes: Y10T 24/32 having magnetic fastener

Abstract

An improved field emission system and method is provided that involves field emission structures having electric or magnetic field sources. The magnitudes, polarities, and positions of the magnetic or electric field sources are configured to have desirable correlation properties, which may be in accordance with a code. The correlation properties correspond to a desired spatial force function where spatial forces between field emission structures correspond to relative alignment, separation distance, and the spatial force function.

Claims

1. A magnetic attachment system, comprising:

a first magnetic structure comprising a first linear sequence of three or more magnetic sources in a first polarity pattern; and

a second magnetic structure comprising a second linear sequence of three or more magnetic sources in a second polarity pattern, said first magnetic structure and said second magnetic structure being in a straight line and being separated by a spacing, wherein said first magnetic structure and said second magnetic structure produce a peak attractive force when said magnetic attachment system is aligned across an interface boundary with a second magnetic attachment system having a third magnetic structure and a fourth magnetic structure that are complementary to said first magnetic structure and said second magnetic structure, wherein said first linear sequence of three or more magnetic sources comprises magnets having different widths, wherein said second linear sequence of three or more magnetic sources comprises magnets having different widths, wherein said first magnetic structure produces a magnetic field in accordance with a Barker 4 code, wherein said second magnetic structure produces a magnetic field in accordance with a Barker 4 code.

2. The magnetic attachment system of claim 1, wherein said first polarity pattern is different from said second polarity pattern.

3. The magnetic attachment system of claim 2, wherein said first polarity pattern is complementary to said second polarity pattern.

4. The magnetic attachment system of claim 2, wherein said first polarity pattern comprises the polarity pattern ‘

+−

+’

.

5. The magnetic attachment system of claim 2, wherein said second polarity pattern comprises the polarity pattern ‘

−

+−

’

.

6. The magnetic attachment system of claim 1, wherein said first magnetic structure is the mirror image of said second magnetic structure.

7. The magnetic attachment system of claim 6, wherein said mirror image is rotated 180 degrees.

8. The magnetic attachment system of claim 1, wherein said spacing corresponds to a non-magnetized region between said first and second magnetic structures.

9. The magnetic attachment system of claim 1, further comprising:

a magnetically saturable layer.

10. The magnetic attachment system of claim 1, further comprising:

an inactive layer that provides a minimum separation distance across said interface boundary between said magnetic attachment system and said second magnetic attachment system.

11. The magnetic attachment system of claim 1, wherein said first magnetic structure and said second magnetic structure are associated with a first object and said third magnetic structure and said fourth magnetic structure are associated with a second object, said peak attractive force providing magnetic attachment of said first object to said second object.

12. The magnetic attachment system of claim 11, wherein said first object is a cover.

13. The magnetic attachment system of claim 11, wherein said second object comprises a glass surface.

14. The magnetic attachment system of claim 13, wherein said first object covers said glass surface.

15. The magnetic attachment system of claim 1, further comprising:

a spring for controlling movement of said magnetic attachment system.

16. The magnetic attachment system of claim 1, further comprising:

a hinge enabling said first object to rotate relative to said first object.