Wind tee and velocity indicator

Claim 1

A WIND DIRECTION AND VELOCITY INDICATOR COMPRISING AN ELONGATED BODY ARRANGED FOR PIVOTAL MOUNTING ADJACENT THE UPPER END ON A UPRIGHT MEMBER; A RUDDER MOUNTED ON SAID BODY AND ARRANGED TO PLANE IN WIND AND POINT SAID ELONGATED BODY WINDWARD; A PAIR OF VANES, EACH MOUNTED ADJACENT THE DOWNWIND END OF SAID ELONGATED BODY AND ARRANGED TO PIVOT FROM AN EXTENDED POSITION SUBSTANTIALLY NORMAL TO SAID BODY AT NO WIND CONDITIONS TO A POSITION SUBSTANTIALLY PARALLEL WITH SAID ELONGATED BODY AT HIGH WIND CONDITIONS; MEANS BIASING SAID VANES TOWARD EACH OTHER; COUNTER-BALANCE MEANS ARRANGED TO BIAS SAID VANES IN NORMALLY EXTENDED POSITION IN OPPOSITION TO SAID MEANS BIASING SAID VANES TOWARD EACH OTHER; ADJUSTABLE FINS ON EACH SAID VANE FOR PLANING IN WIND AND PIVOTING SAID VANES IN RESPONSE TO WIND PRESSURE; MEANS PROVIDING STEPWISE MOVEMENT OF SAID VANES AND EACH STOP OF MOVEMENT CORRESPONDING TO A PREDETERMINED RANGE OF WIND VELOCITIES; AND LIGHT MEANS MOUNTED ON SAID ELONGATED MEMBER AND ON EACH SAID VANES FOR ILLUMINATING SAID WIND DIRECTION AND VELOCITY INDICATOR AT NIGHT.