Vertical sensor

Claim 1

IN COMBINATION: A VERTICAL GYROSCOPE, GIMBAL SUPPORTED UPON A SUPPORTING VEHICLE; A SEPARATE GIMBALED MEANS SUPPORTED UPON SAID VEHICLE; MEANS MOUNTED UPON SAID SUPPORTING VEHICLES FOR DETECTING THE MAGNITUDE AND DIRECTION OF THE HORIZONTAL COMPONENT OF VELOCITY OF SAID SUPPORTING VEHICLE RELATIVE TO THE SURFACE OF THE EARTH; A PENDULUM MOUNTED FOR TWO DEGREES OF FREEDOM AND ONE DEGREE OF CONTROLLED ROTATION RELATIVE TO SAID SEPARATE GIMBALED MEANS, THE CONTROLLED DEGREE OF ROTATION BEING ABOUT AN AZIMUTH AXIS, THE FIRST AND SECOND DEGREES OF FREEDOM BEING, RESPECTIVELY, FREE ROTATION ABOUT A PAIR OF NORMAL AXES PARALLEL AND NORMAL TO THE HORIZONTAL COMPONENT OF VELOCITY AND NORMAL THERETO; MEANS CONNECTED TO SAID VELOCITY DETECTING MEANS ADAPTED AND CONNECTED TO ALIGN SAID LAST NAMED GIMBALS ABOUT SAID AZIMUTH AXIS; A ROTOR CONNECTED TO SAID LAST NAMED GIMBALS TO SPIN ABOUT A HORIZONTAL AXIS NORMAL TO THE HORIZONTAL COMPONENT OF VELOCITY OF SAID SUPPORTING VEHICLE; AND MEANS CONNECTED TO SAID VELOCITY MEASURING MEANS ADAPTED TO APPLY A TORQUE BETWEEN SAID PENDULUM AND SAID ROTOR PROPORTIONAL TO THE MAGNITUDE OF ACCELERATION OF SAID VEHICLE IN ACCORDANCE WITH A PREDETERMINED RATIO; ANGLE DETECTING MEANS CONNECTED TO SAID PENDULUM AND SAID VERTICAL GYROSCOPE TO DETERMINE THE ANGLE BETWEEN SAID PENDULUM AND THE SPIN AXIS OF SAID VERTICAL GYROSCOPE; MEANS CONNECTED BETWEEN SAID ANGLE DETECTING MEANS AND SAID VERTICAL GYROSCOPE OF APPLY TORQUES OF FROM SAID DETECTING MEANS TO ERECT SAID VERTICAL GYROSCOPE TO THE POSITION OF SAID PENDULUM.