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US 6,145,467 AGranted
Magnetic field indicator
AssigneeGeneral Electric Company
InventorGregory A. Repinski
Life of this patent
Estimating the term…
Abstract
A magnetic field indicator mounts to an MRI system to indicate the presence of the polarizing magnetic field. An indicator wheel is mounted to a frame and is rotatable between an energized orientation in which a red colored region is seen through a window and a de-energized orientation in which a green region is aligned with the window. A weight biases the indicator wheel in the de-energized orientation and a ferrous rod rotates the wheel to its energized orientation when the polarizing field is present.
Claims7
A magnetic field indicator which comprises:
- a frame having a front wall;
- an indicator mounted to the frame and disposed behind the front wall;
- means for non-magnetically biasing the indicator in a de-energized orientation in which a first indicia on the indicator is aligned in a window formed in the front wall;
- and
- a ferrous rod mounted to the indicator and responsive to an applied magnetic field to move the indicator to an energized orientation in which a second indicia on the indicator is aligned in said window.
2 more elements
Dependencies are inferred from the claim text.