Patent ID: 6722207
Filing Date: 2004-04-20
Classification: G01F

Abstract:
An electro-magnetic transducer for interaction with a fluid in a tube, the transducer comprising:at least one electro-magnet for providing a flux transverse to a selected portion of the tube; an electrically insulating scroll extending along an axis of the selected portion of the tube, an outer portion of the scroll adjacent an inner wall of the tube, an inner portion of the scroll distal therefrom and adjacent the axis of the tube; at least one pair of electrodes attached to the scroll at a selected axial position within the selected portion of the tube, the at least one pair of electrodes defining an associated spiral electrical path extending along the scroll from one of the two electrodes of the at least one pair thereof to the other; and at least one electric circuit external to the tube for providing electric power to the at least one electro-magnet.