Deflecting magnetic field shield

• US 7,220,488 B2
• Filed: 10/18/2004
• Issued: 05/22/2007
• Est. Priority Date: 10/18/2004
• Status: Expired due to Fees

• Current Assignee: Gordon Wadle, William May
• Original Assignee: Gordon Wadle, William May
• Inventors: May, William, Wadle, Gordon
• Primary Examiner(s): McNeil; Jennifer
• Assistant Examiner(s): BALDWIN, GORDON
• Application Number:
  US10/967,752
• Publication Number:
  US 20060083931A1
• Time in Patent Office: 946 Days
• Field of Search: None
• US Class Current: 428/432
• CPC Class Codes: H05K 9/0075 Magnetic shielding materials
• CPC Class Codes: Y10T 428/31678 Of metal
• CPC Class Codes: Y10T 428/31717 Next to bituminous or tarry residue

Abstract

The present invention concerns a shielding material for a magnetic shield containing coal slag; silver powder; a mixture of calcium powder, magnesium powder, and zinc powder; and silica powder. The shielding material is in powder form. In another embodiment, the present invention contemplates adding nano-silver to the shielding material. The present invention is based on the concept that the magnetic field is actually “deflected” away from the area shielded. This is possible in view of the shielding materials used to produce the magnetic shield.

Claims

1. A shielding material for a magnetic shield comprising:

coal slag,

silver powder;

a mixture of calcium powder, magnesium powder, and zinc powder; and

silica powder;

wherein the shielding material is in powder form.

2. The shielding material according to claim 1, wherein the coal slag is 30/60 sized coal slag.

3. The shielding material according to claim 1, wherein the silver powder has a size of 6 μ

m.

4. The shielding material according to claim 1, wherein the silica powder is white silica powder having 250 sieve screen.

5. The shielding material according to claim 1, further comprising nano-sized silver.

6. A shielding material for a magnetic shield comprising:

from about 20 to about 50 weight percent of a coal slag,

from about 40 to about 30 weight percent of a silver powder;

from about 15 to about 45 weight percent of a mixture of calcium powder, magnesium powder, and zinc powder; and

from about 15 to about 45 weight percent of a silica powder.

7. A magnetic shield comprising:

a substrate and, disposed above said substrate,

a powdered shielding material comprising;

coal slag,

silver powder;

a mixture of calcium powder, magnesium powder, and zinc powder; and

silica powder.

8. The magnetic shield according to claim 7, wherein the shielding material further comprises nano-sized silver.

9. The magnetic shield according to claim 7, wherein said shield is contiguous with said substrate.

10. The magnetic shield according to claim 7, wherein said substrate is a foil.

11. The magnetic shield according to claim 7, wherein said substrate is comprised of ceramic material.

12. The magnetic shield according to claim 7, wherein said substrate is comprised of glass.

13. The magnetic shield according to claim 7, wherein said substrate is in the form of a cylinder.

14. The magnetic shield according to claim 7, wherein said substrate is in the shape of a sphere.

15. A method for preparing a shielding material for a magnetic shield comprising the steps of:

providing coal slag;

coating the coal slag with a silver powder;

adding silica powder;

adding a mixture of calcium powder, magnesium powder, and zinc powder.

16. A method according to claim 15 further comprising adding nano-sized silver.

17. A method according to claim 15, wherein the shielding material is suspended in an appropriate vehicle, and then mixed with a sprayable coating material.

18. A shielding material for a magnetic shield comprising:

35 weight percent of a coal slag,

15 weight percent of a silver powder;

25 weight percent of a mixture of calcium powder, magnesium powder, and zinc powder; and

25 weight percent of a silica powder.

19. A shielding material for a magnetic shield comprising:

from about 20 to about 50 weight percent of a coal slag,

from about 4 to about 30 weight percent of a micrometer sized silver powder;

from about 15 to about 45 weight percent of a mixture of calcium powder, magnesium powder, and zinc powder;

from about 15 to about 45 weight percent of a silica powder; and

from about 3 to about 10 weight percent of nano-sized silver powder.

20. A shielding material for a magnetic shield comprising:

33 weight percent of a coal slag,

15 weight percent of a micrometer sized silver powder;

7 weight percent of a nano-sized silver;

20 weight percent of a mixture of calcium powder, magnesium powder, and zinc powder; and

25 weight percent of a silica powder.