Lotke

Claim 1

AN APPARATUS FOR CONTINUALLY MEASURING THE DENSITY OF A FLUID, COMPRISING A CONTAINER FOR SAID FLUID HAVING AN ELEONGATED, SUBSTANTIALLY VERTICAL PORTION, A FLUID INTAKE PORT AND A FLUID DISCHARGE PORT ON SAID CONTAINER, FLOAT MEANS WITHIN SAID CONTAINER AND AT LEAST PARTLY WITHIN SAID ELONGATED PORTION, A TEMPORARILY MAGNETIZABLE CORE AND A PERMANENT MAGNET SECURED TO SAID FLOAT MEANS IN SPACEDAPART RELATION WITHIN SAID ELONGATED PORTIN, ELECTRONIC SENSING MEANS POSITIONED AT A FIRST LOCATION OUTSIDE OF SAID ELONGATED PORTION AND RESPONSIVE TOTHE RELATIVE MOVEMENT OF SAID CORE FOR PRODUCING A SIGNAL PROPORTIONAL TO SAID DENSITY, ADDITIONAL MEANS POSITINED AT A SECOND LOCATION OUTSIDE OF SAID ELONGATED PORTION AND HAVING A MAGNETIC FIELD ADAPTED TO BE VARIED BY SAID SIGNAL FOR REPELLING SAID MAGNET AND MOVING SAID FLOAT MEANS TOWARD A MEDIAN POSITION WITHIN SAID CONTAINER, SAID SENSING MEANS AND SAID ADDITIONAL MEANS BEING VERTICALLY DISPLACED AT SAID LOCATIONS IN A LATERALLY SPACED-APART RELATION FROM THE SUBSTANTIALLY VERTICAL AXIS OF RELATIVE MOVEMENT OF SAID FLOAT MEANS, OSCILLATOR MEANS ADAPTED TO BE INVLUENCED BY THE VARYING INDUCTANCE OF SAID SENSING MEANS, RECTIFIER MEANS CONNECTED TO SAID OSCILLATOR MEANS, AND METER MEANS CONNECTED IN SERIES WITH SAID ADDITIONAL MEANS AND SAID RECTIFIER MEANS AND BEING RESPONSIVE TO SAID SIGNAL FOR PRODUCING A DIRECT DENSITY INDICATION.