Control position indicator for use with gyro instruments or the like

Claim 1

IN COMBINATION; PILOT OPERATED CONTROL MEANS TO CONTROL THE ATTITUDE OF A VEHICLE, REFERENCE MEANS PROVIDING AN ARTIFICIAL HORIZON WITH RESPECT TO WHICH THE ATTITUDE OF SAID VEHICLE IS TO BE CONTROLLED, SAID REFERENCE MEANS INCLUCING MECHANISM TO MAINTAIN SAID ARTIFICIAL HORIZON IN A FIXED POSITION, AN INDICATOR RING, MEANS TO MOUNT SAID RING ON SAID MECHANISM IN A MANNER TO PREVENT ROTATIONAL MOVEMENT BETWEEN SAID ARTIFICIAL HORIZON AND SAID RING BUT TO PERMIT RELATIVE VERTICAL MOVEMENT THEREBETWEEN, CONTROL INDICATING MEANS CONNECTED TO SAID CONTROL MEANS SO AS TO MOVE IN THE SAME DIRECTION AS THE VEHICLE IS TO BE MOVED, SAID CONTROL INDICATING MEANS BEING ROTATABLE IN A PLANE PARALLEL TO SAID RING AND ABOUT THE CENTRAL AXIS THEREOF, AND MEANS ON SAID RING FOR VISUALLY INDICATING THE ANGULAR DISPLACEMENT BETWEEN THE RING AND THE CONTROL INDICATING MEANS TO INDICATE THE CORRECT FUNCTIONAL POSITION OF SAID CONTROL MEANS IN RELATION TO THE VEHICLE''S ATTITUDE TO BRING THE ATTITUDE OF SAID VEHICLE INTO PROPER RELATION WITH SAID ARTIFICIAL HORIZON, WHEREBY PROPER PILOT CONTROL OF SAID VEHICLE MAY BE ACCOMPLISHED BY OPERATING SAID CONTROL MEANS SO AS TO MAINTAIN SAID CONTROL INDICATING MEANS IN PROPER RELATION WITH SAID ARTIFICIAL HORIZON AND SAID INDICATOR RING.