Transducer providing alternating-current output in response to rotation of transducer body relative to inertial conductive fluid contained therein

Claim 1

A ROTATION SENSOR COMPRISING: (A) A CYLINDRICAL IRON CORE; (B) A COIL SURROUNDING SAID CORE; (C) MEANS FOR APPLYING ALTERNATING CURRENT TO SAID COIL; (D) FIRST AND SECOND CIRCULAR END PLATES FASTENED TO THE ENDS OF SAID CORE, THE DIAMETERS OF SAID END PLATES BEING SUBSTANTIALLY LARGER THAN THE DIAMETER OF SAID CORE, SAID END PLATES BEING MUTUALLY PARALLEL TO EACH OTHER AND MUTUALLY PERPENDICULAR TO THE AXIS OF SAID CORE; (E) AN ANNULAR LIQUID-TIGHT CHANNEL POSITIONED BETWEEN SAID END PLATES AND COAXIAL WITH SAID CORE; (F) AN ELECTRICALLY CONDUCTIVE FLUID SUBSTANTIALLY FILLING SAID CHANNEL; AND (G) FIRST AND SECOND ELECTRODES FOR SENSING THE DEVELOPMENT OF AN ALTERNATING RADIAL POTENTIAL GRADIENT IN SAID FLUID, SAID ELECTRODES BEING MOUNTED IN CONTACT WITH SAID FLUID AND RADIALLY SPACED FROM EACH OTHER; (H) WHEREBY APPLICATION OF ROTATIONAL ACCELERATION TO SAID SENSOR ABOUT THE AXIS OF SAID CORE RESULTS IN MOTION OF SAID END PLATES RELATIVE TO SAID FLUID, THE MAGNETIC LINES OF FORCE EXTENDING BETWEEN SAID END PLATES CUTTING THE CONDUCTOR REPRESENTED BY SAID FLUID AND GIVING RISE TO A RADIAL ALTERNATING ELECTRICAL POTENTIAL GRADIENT IN SAID FLUID SO THAT THE ALTERNATING POTENTIAL APPEARING AT SAID ELECTRODES IS INDICATIVE OF THE APPLICATION OF ROTATIONAL ACCELERATION TO SAID SENSOR.