Translating device for converting a mechanical magnitude into an electric frequency

Claim 1

APPARATUS FOR COMPARING THE SPEES OF ROTATION OF AT LEAST TWO ROTATING DEVICES, SAID APPARATUS COMPRISING INDUCTIVE TRANSLATING DEVICES FOR CONVERTING EACH OF SAID SPEEDS INTO CORRESPONDING FREQUENCIES OF AN ELECTRICAL MAGNITUDE, EACH OF SAID DEVICES COMPRISING RESISTANCE PLATE MEANS OF SEMICONDUCTOR MATERIAL, CARRIER MEANS HAVING AN AXIS, DRIVE MEANS COUPLED TO SAID CARRIER MEANS FOR ROTATING IT ABOUT SAID AXIS AT A SPEED RELATIVE TO SAID PLATE MEANS WHICH IS CORRELATIVE WITH THE ROTATIONAL SPEED TO BE TRANSLATED, A PLURALITY OF PERMANENT MAGNETS MOUNTED ON SAID CARRIER AND DISTRIBUTED THEREABOUT AT UNIFORM DISTANCES, CIRCUIT CONNECTIONS ATTACHED TO SAID SEMICONDUCTOR PLATE AT OPPOSING EDGES THEREOF FOR PROVIDING CURRENT IN SAID PLATE AND A PERIODIC OUTPUT VOLTAGE AT OPPOSING EDGES THEREOF, SAID PLATE BEING MOUNTED NEAR THE TRAVEL PATH OF SAID MAGNET TO BE SUBJECTED TO THE MAGNETIC FIELDS OF SAID RESPECTIVE MAGNETS DURING ROTATION OF SAID CARRIER MEANS, SAID PLATE BEING LOCATED IN A PLANE DEFINED BY THE MAGNETIC AXIS OF EACH PERMANENT MAGNET WHEN AT THE POINT CLOSEST TO SAID PLATE DURING SAID ROTATION AND BY A LINE PERPENDICULAR TO THE TANGENTIAL DIRECTION OF CARRIER TRAVEL AT SAID POINT; PULSE COUNTER MEANS CONNECTED TO THE PERIODIC OUTPUT VOLTAGE CIRCUIT CONNECTIONS OF EACH OF THE SEMICONDUCTOR PLATES; AND COMPARATOR MEANS CONNECTED TO SAID PULSE COUNTER MEANS FOR DETERMINING A FUNCTION OF THE SPEEDS OF ROTATION.