Magnetic gradient detector with means for adjusting the parallelism of the sensors
First Claim
1. A magnetic gradient detector having two magnetic field sensors, the magnetic axes of which are parallel to an imaginary line, said sensors being installed a predetermined distance from one another along the imaginary line and having respective electrical outputs connected together to provide an electrical signal corresponding to the gradient of the magnetic fields present at the location of the two magnetic field sensors, the improvement comprising:
- each magnetic field sensor is connected to a separate wire maintained in axial tension, said wires being arranged parallel to each other and to the imaginary line; and
first and second means respectively connected to said wires for adjustably shifting the wires in planes perpendicular to each other and to the respective wires.
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Accused Products
Abstract
The magnetic gradient detector has two magnetic field sensors with their magnetic axes arranged parallel to an imaginary line. The sensor electrical outputs are connected with one another such that an electrical signal is created corresponding to the gradient of the magnetic fields present at the respective locations of the sensors. Each sensor has its core suspended on a wire under tension which maintains the parallelism constant. The wires are adjustable to establish initial parallelism or correct for subsequent misalignment that may occur.
17 Citations
13 Claims
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1. A magnetic gradient detector having two magnetic field sensors, the magnetic axes of which are parallel to an imaginary line, said sensors being installed a predetermined distance from one another along the imaginary line and having respective electrical outputs connected together to provide an electrical signal corresponding to the gradient of the magnetic fields present at the location of the two magnetic field sensors, the improvement comprising:
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each magnetic field sensor is connected to a separate wire maintained in axial tension, said wires being arranged parallel to each other and to the imaginary line; and first and second means respectively connected to said wires for adjustably shifting the wires in planes perpendicular to each other and to the respective wires. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A magnetic gradient detector, comprising:
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a rod; first and second helical windings affixed to said rod at spaced points with the respective axes parallel to each other; a wire passing through both of said windings; first and second hollow tubular cores of ferromagnetic material received on said wire, located respectively within the first and second helical windings and affixed to said wire; means mounted on said rod contacting an intermediate portion of said wire for adjustably tensioning said wire; a base plate having openings through which the respective ends of the wire pass; and means in said base plate openings for clampingly securing said wire and for adjustably positioning said wire. - View Dependent Claims (11, 12, 13)
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Specification