Cylindrical torque balance accelerometers

Claim 1

IN A FLOATED, TORQUE BALANCE, PENDULOUS ACCELEROMETER FOR SENSING TRANSLATION ACCELERATIONS APPLIED ALONG A SENSITIVE AXIS OF THE ACCELEROMETER AND PRODUCING A SIGNAL PROPORTIONAL THERETO, THE ACCELEROMETER INCLUDING A TORQUER MAGNET FOR GENERATING A MAGNETIC FIELD TO RESTORE THE ACCELEROMETER PENDULOUS ELEMENT TO A NULL POSITION, THE COMBINATION COMPRISING: AN OUTER CASE; A FLOATATION FLUID LOCATED WITHIN SAID CASE; A CYLINDRICAL PENDULUM ELEMENT POSITIONED WITHIN SAID CASE AND SUBSTANTIALLY FLOATED BY SAID FLOTATION FLUID, SAID PENDULUM ELEMENT HAVING A ROTATIONAL AXIS AND A LONGITUDINAL AXIS OF SYMMETRY, SAID ROTATIONAL AXIS BEING SUBSTANTIALLY PARALLEL WITH AND OFFSET FROM SAID AXIS OF SYMMETRY, SAID PENDULUM ELEMENT FURTHER HAVING A CENTER OF BUOYANCY POSITIONED A FIRST PREDETERMINED DISTANCE FROM SAID ROTATIONAL AXIS AND A CENTER OF MASS RADIALLY DISPLACED A SECOND PREDETERMINED DISTANCE FROM SAID AXIS OF SYMMETRY SO THAT TEMPERATURE INDUCED DENSITY VARIATIONS IN THE FLOTATION FLUID MAY ALTER THE FLOTATION FLUID SUPPORT OF SAID PENDULUM ELEMENT TO SUBSTANTIALLY COMPENSATE FOR TEMPERATURE INDUCED VARIATIONS IN THE TORQUER MAGNET FIELD STRENGTH, TRANSLATIONAL ACCELERATION APPLIED PARALLEL TO THE SENSITIVE AXIS OF THE ACCELEROMETER WHEN SAID PENDULUM ELEMENT IS IN THE NULL POSITION TENDING TO PRODUCE ROTATIONAL MOMENS ON SAID PENDULUM ELEMENT ABOUT SAID ROTATIONAL AXIS FOR ROTATING SAID PENDULUM ELEMENT; A PAIR OF JEWEL-AND-PIVOT BEARINGS FOR ROTATABLY MOUNTING SAID CYLINDRICAL PENDULUM ELEMENT WITHIN SAID CASE, SAID PAIR OF BEARINGS DEFINING SAID ROTATIONAL AXIS; AN ANGULAR MOTION SENSOR POSITIONED IN REGISTER WITH SAID CYLINDRICAL PENDULUM ELEMENT AND RESPONSIVE TO THE ROTATION OF SAID PENDULUM ELEMENT FOR PRODUCING A SIGNAL PROPORTIONAL THERETO; AND A TORQUER ELEMENT, INCLUDING THE TORQUER MAGNET, RESPONSIVE TO SAID SIGNAL FOR GENERATING A MAGNETIC FIELD TO EXERT A TORQUE ON SAID CYLINDRICAL PENDULUM ELEMENT OPPOSING THE ROTATION OF SAID PENDULUM ELEMENT AND TENDING TO MAINTAIN SAID PENDULUM ELEMENT AT THE PREDETERMINED NULL POSITION.