Acceleration measuring system

Claim 1

IN AN ACCELEROMETER SENSING SYSTEM FOR MEASURING ACCELERATIONS DIRECTED ALONG A SENSITIVE AXIS, THE COMBINATION COMPRISING: A STABLE PLATFORM; A FIRST ACCELEROMETER HAVING A PENDULUM UNIT NORMALLY NULL POSITIONED EXPERIENCING TORQUES TENDING TO ROTATE SAID PENDULUM UNIT CLOCKWISE AND COUNTER-CLOCKWISE IN RESPONSE TO POSITIVE AND NEGATIVE POLARITY ACCELERATIONS, RESPECTIVELY, DIRECTED ALONG THE SENSITIVE AXIS, SAID ACCELROMETER FURTHER INCLUDING PICK-OFF MEANS POSITIONED ADJACENT SAID PENDULUM UNIT AND OPERABLE TO PRODUCE AN OUTPUT SIGNAL REPRESENTATIVE OF THE ROTATIONAL MOVEMENT OF SAID PENDULUM UNIT AND TORQUER MEANS POSITIONED ADJACENT SAID PENDULUM UNIT AND RESPONSIVE TO THE OUTPUT SIGNAL FOR APPLYING A BALANCING TORQUE TO SAID PENDULUM UNIT TO MAINTAIN SAID PENDULUM UNIT IN THE NULL POSITION; A SECOND ACCELEROMETER HAVING A PENDULUM UNIT NORMALLY NULL POSITIONED EXPERIENCING TORQUES TENDING TO ROTATE SAID PENDULUM UNIT COUNTERCLOCKWISE AND CLOCKWISE IN RESPONSE TO POSITIVE AND NEGATIVE POLARITY ACCELERATIONS, RESPECTIVELY, DIRECTED ALONG THE SENSITIVE AXIS, SAID ACCELEROMETER FURTHER INCLUDING PICKOFF MEANS POSITIONED ADJACENT SAID PENDULUM UNIT AND OPERABLE TO PRODUCE AN OUTPUT SIGNAL REPRESENTATIVE OF THE ROTATIONAL MOVEMENT OF SAID PENDULUM UNIT AND RESPONSIVE TO THE OUTPUT SIGNAL FOR APPLYING A BALANCING TORQUE TO SAID PENDULUM UNIT TO MAINTAIN SAID PENDULUM UNIT IN THE NULL POSITION; AND SUMMING MEANS FOR SUMMING THE OUTPUT SIGNALS OF THE ACCELEROMETERS TO PRODUCE A RESULTANT OUTPUT SIGNAL REPRESENTATIVE OF THE SENSED ACCELERATIONS BUT WITH VIBRATION INDUCED RECTIFICATION ERRORS CANCELLED OUT.