System for obtaining an indication of a time parameter defining the relative motion of a moving object and a moving target

Claim 1

THE COMBINATING OF A MOVING BODY AND A TARGET DETECTION SYSTEM FOR INDICATING THE TIME PARAMETER DEFINING THE RELATIVE DISTANCE AND VELOCITY OF THE BODY MOVING ALONG A FIRST AXIS AND THE TARGET MOVING ALONG A SECOND AXIS, SAID BODY HAVING AN ANNULAR CASING WITH A CENTRAL LONGITUDINAL AXIS AND HAVING A SERIES OF WINDOWS SPACED AROUND SAID CASING; SAID DETECTION SYSTEM COMPRISING AN ANNULAR MEMBER HAVING AT LEAST A PORTION OF ITS FACE IN THE FORM OF A PARABOLIC REFLECTOR MOUNTED IN SAID CASING AND BEING COAXIAL THEREWITH, SAID REFLECTOR POSITIONED WITH ITS OUTER PERIPHERY CONTIGUOUS SAID WINDOWS AND HAVING ITS INNER PERIPHERY SPACED FROM SAID CENTRAL AXIS SUCH THAT RAYS ENTERING THE WINDOWS FROM PREDETERMINED OUTWARD FIELDS OF VIEW ARE REFLECTED BY SAID REFLECTOR TOWARD SAID CENTRAL AXIS; A DETECTOR UNIT MOUNTED IN SAID CASING ON SAID CENTRAL AXIS AND BEING AXIALLY SPACED FROM SAID REFLECTOR A DISTANCE SO AS TO RECEIVE THE REFLECTED RADIATION; A FIRST SCREEN MOUNTED THROUGH A CROSS SECTION OF SAID BODY AT A POSITION BETWEEN SAID REFLECTOR AND SAID DETECTOR UNIT AND HAVING AN ANNULAR SLOT DEFINED THEREIN THROUGH WHICH A PORTION OF THE REFLECTED RAYS PASS SUCH THAT SAID SLOT AND SAID REFLECTOR COOPERATE TO DEFINE THE