Scanning reflector on stabilized platform having a stowed position

Claim 1

A RADAR ANTENNA ASSEMBLY FOR MOUNTING ON A GENERALLY HORIZONTAL BASE SURFACE, COMPRISING (A) A FRAMEWORK, (B) MEANS FOR MOUNTING SAID FRAMEWORK ON THE BASE SURFACE FOR PIVOTING ABOUT A FIRST GENERALLY HORIZONTAL AXIS, (C) A FIRST ACTUATOR EXTENDING BETWEEN SAID FRAMEWORK AND SAID SURFACE FOR CONTROLLING PIVOTAL MOVEMENT OF SAID FRAMEWORK ABOUT SAID AXIS, (D) A PLATFORM, (E) MEANS MOUNTING SAID PLATFORM ON SAID FRAMEWORK FOR PIVOTING ABOUT A SECOND GENERALLY HORIZONTAL AXIS PERPENDICULAR TO SAID FIRST AXIS, (F) A SECOND ACTUATOR EXTENDING BETWEEN SAID PLATFORM AND SAID FRAMEWORK FOR CONTROLLING PIVOTAL MOVEMENT OF SAID PLATFORM ABOUT SAID SECOND AXIS, (G) A TURNTABLE MOUNTED ON SAID PLATFORM FOR ROTATION ABOUT A VERTICAL AXIS, (H) AN ANTENNA ARRAY MOUNTED ON SAID TURNTABLE, (I) FIRST LEVEL DETECTOR MEANS SENSITIVE TO THE EXISTENCE AND SENSE OF ANY MISALIGNMENT OF SAID FRAMEWORK FROM THE HORIZONTAL ABOUT SAID FIRST AXIS, (J) SECOND LEVEL DETECTOR MEANS SENSITIVE TO THE EXISTENCE AND SENSE OF ANY MISALIGNMENT OF SAID PLATFORM FROM THE HORIZONTAL ABOUT SAID SECOND AXIS, (K) LEVELLING MEANS RESPONSIVE TO SIGNALS FROM BOTH SAID DETECTOR MEANS TO ENERGISE SAID ACTUATORS TO RESTORE SAID PLATFORM TO A HORIZONTAL PLANE UPON OCCURRENCE OF ANY SUCH MISALIGNMENT, (L) FIRST POSITION DETECTOR MEANS SENSITIVE TO THE EXISTENCE AND SENSE OF ANY DEFLECTION OF SAID FIRST ACTUATOR FROM A PREDETERMINED POSITION, (M) SECOND POSITION DETECTOR MEANS SENSITIVE TO THE EXISTENCE AND SENSE OF ANY DEFLECTION OF SAID SECOND ACTUATOR FROM A PREDETERMINED POSITION, (N) STOWAGE MEANS RESPONSIVE TO SIGNALS FROM BOTH SAID POSITION DETECTOR MEANS TO RESTORE BOTH SAID ACTUATORS TO THEIR PREDETERMINED POSITIONS, (O) AND SWITCH MEANS FOR CHOOSING BETWEEN SAID LEVELLING MEANS AND SAID STOWAGE MEANS AND FOR ACTIVATING ONLY THE CHOSEN MEANS.