Abstract: An electromechanical transducer for converting mechanical analog angular information to electrical linear information, utilizing a primary winding and a first and second secondary winding, said secondary windings being arranged perpendicular to each other and rotatable in relationship to the primary winding. The primary winding is connected to the output of an amplifier. The amplifier is inductively fed back by means of the primary winding and one of the secondary windings. The input voltage of the amplifier is related to the voltage across the other secondary winding and privides a linear measure for the rotation of the secondary windings in relationship to the primary winding.

Abstract: Two systems are disclosed in which a pointer is directed towards a moving target over a predetermined time interval. Angular information is derived from the pointer during this time interval to generate signals indicative of the distance of the object from the pointer. During a second time interval, the pointer is automatically directed towards the moving object by use of the information derived during the first time interval.