Control system for vtol vehicles

Claim 1

A MECHANICAL CONTROL SYSTEM FOR VTOL/STOL AIRCRAFT ADAPTED TO IMPROVE THE APPARENT STABILITY THEREOF AT SUCH TIMES AS THE AIRCRAFT ARE EXCUTING VTOL/STOL PORTIONS OF THEIR FLIGHT PHASE COMPRISING: FIRST AND SECOND BELL CRANK MEMBERS THE BIGHT PORTIONS OF WHICH ARE PIVOTALLY SECURED TO FIXED STRUCTURE, AND OUTPUT MEMBER PIVOTALLY SECURED TO ONE ARM OF SAID FIRST CRANK MEMBER; FIRST HELICAL SPRING MEANS THE ENDS OF WHICH ARE PIVOTALLY SECURED TO SAID ONE ARM OF SAID FIRST CRANK MEMBER AND FIXED STRUCTURE, RESPECTIVELY, AND ELONGATED EQUALIZING LINK HAVING ONE END THEREOF PIVOTALLY SECURED TO THE OTHER ARM OF SAID FIRST CRANK MEMBER; AND INTERMEDIATE LINK THE ENDS OF WHICH ARE RESPECTIVELY PIVOTALLY SECURED TO THE OTHER END OF SAID EQUALIZING LINK AND ONE ARM OF SAID SECOND CRANK MEMBER; A MASS SECURED TO SAID ONE ARM OF SAID SECOND CRANK MEMBER; A DAMPER MEANS SECURED TO FIXED STRUCTURE AND EXTENDING THEREBETWEEN AND SAID ONE ARM OF SAID SECOND CRANK MEMBER IN PIVOTAL RELATION; SECOND HELICAL SPRING MEANS SECURED TO AND EXTENDING BETWEEN FIXED STRUCTURE AND THE OTHER ARM OF SAID SECOND CRANK MEMBER; AN INPUT MEMBER PIVOTALLY SECURED TO SAID EQUALIZING LINK AT A LOCATION INTERMEDIATE THE ENDS THEREOF; SAID FIRST CRANK AND OUTPUT MEMBER NORMALLY HAVING A NEUTRAL POSITION ASSUMED PRIOR TO ANY MOVEMENT BEING IMPARTED THERETO BY SAID INPUT MEMBER; SAID FIRST SPRING MEANS ACTING TO URGE SAID FIRST CRANK MEMBER AND OUTPUR MEMBERS TOWARD SAID NEUTRAL POSITIONS AT SUCH TIMES AS THEY ARE MOVED THEREFROM; AND SAID FIRST AND SECOND CRANK MEMBERS, EQUALIZING AND INTERMEDIATE LINKS, MASS, DAMPER MEANS AND FIRST AND SECOND SPRING MEANS COOPERATING TO IMPART A PRIMARY MOTION TO SAID OUTPUT MEMBER CORRESPONDING AND RESPONSIVE TO MOVEMENT OF SAID INPUT MEMBER AND SECONDARY MOTION IN WHICH SAID PRIMARY MOTION DECAYS AND THEREAFTER A MOTION COUNTERING SAID PRIMARY MOTION.