IP Library › Granted Patent US 8,441,330
Granted Patent B2
US 8,441,330 · App. 13/050,742 · Granted May 14, 2013

Systems and methods for magnetic shielding

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Quick Facts
Patent No.
US 8,441,330
App. No.
13/050,742
Granted
May 14, 2013
Kind
B2
Abstract

Systems and methods for magnetic shielding are described. A magnetic shield formed of a material having a high magnetic permeability may be degaussed using a toroidal degaussing coil. The toroidal degaussing coil may enclose at least a portion of the shield. Magnetic field gradients may be actively compensated using multiple magnetic field sensors and local compensation coils. Trapped fluxons may be removed by an application of Lorentz force wherein an electrical current is passed through a superconducting plane.

Claims (8)

1. A magnetic shielding system comprising:

a shield structure having a longitudinal center axis, wherein the shield structure is cylindrical in geometry; and

a degaussing coil, wherein the degaussing coil is wrapped around at least a portion of the shield structure in a toroidal configuration such that the degaussing coil encloses at least a portion of the shield structure and at least a portion of the degaussing coil is parallel to the longitudinal center axis of the shield structure, and wherein the shield structure has a closed end that includes a through-hole through which the degaussing coil is threaded.

2. The magnetic shielding system of claim 1 wherein the shield structure is formed of a material having high magnetic permeability.

3. The magnetic shielding system of claim 1 , further comprising a cap positioned over the through-hole.

4. The magnetic shielding system of claim 3 wherein the cap is formed of a material having high magnetic permeability.

5. The magnetic shielding system of claim 1 , further comprising a current source, wherein the degaussing coil is electrically coupled to the current source.

6. The magnetic shielding system of claim 5 , further comprising a magnetic field sensor positioned within a volume enclosed by the shield structure.

Assignments (10)
RELEASE OF SECURITY INTEREST Recorded Mar 11, 2025
From: PSPIB UNITAS INVESTMENTS II INC.
To: D-WAVE SYSTEMS INC.; 1372934 B.C. LTD.
Reel/Frame 070470/0098 →
INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded Apr 14, 2023
From: D-WAVE SYSTEMS INC.; 1372934 B.C. LTD.
To: PSPIB UNITAS INVESTMENTS II INC., AS COLLATERAL AGENT
Reel/Frame 063340/0888 →
RELEASE OF SECURITY INTEREST Recorded Sep 20, 2022
From: PSPIB UNITAS INVESTMENTS II INC., IN ITS CAPACITY AS COLLATERAL AGENT
To: D-WAVE SYSTEMS INC.
Reel/Frame 061493/0694 →
SECURITY INTEREST Recorded Mar 3, 2022
From: D-WAVE SYSTEMS INC.
To: PSPIB UNITAS INVESTMENTS II INC.
Reel/Frame 059317/0871 →
SECURITY INTEREST Recorded Nov 29, 2019
From: D-WAVE SYSTEMS INC.
To: BDC CAPITAL INC.
Reel/Frame 051144/0499 →
SECURITY INTEREST Recorded Mar 22, 2019
From: D-WAVE SYSTEMS INC.
To: BDC CAPITAL INC.
Reel/Frame 048674/0188 →
RELEASE OF SECURITY INTEREST Recorded Apr 13, 2017
From: VENTURE LENDING & LEASING VI, INC.; VENTURE LENDING & LEASING VII, INC.
To: D-WAVE SYSTEMS INC.
Reel/Frame 042252/0256 →
CORRECTIVE ASSIGNMENT TO REMOVE APPL. NO. 8733763 PREVIOUSLY RECORDED AT REEL: 034841 FRAME: 0497. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY AGREEMENT. Recorded Jan 30, 2015
From: D-WAVE SYSTEMS INC.
To: VENTURE LENDING & LEASING VI, INC.; VENTURE LENDING & LEASING VII, INC.
Reel/Frame 034862/0237 →
SECURITY INTEREST Recorded Jan 29, 2015
From: D-WAVE SYSTEMS INC.
To: VENTURE LENDING & LEASING VI, INC.; VENTURE LENDING & LEASING VII, INC.
Reel/Frame 034841/0497 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 27, 2011
From: UCHAYKIN, SERGEY V.
To: D-WAVE SYSTEMS INC.
Reel/Frame 026353/0498 →