Attitude detector

Claim 1

AN ATTITUDE DETECTOR FOR A CONVEYANCE ON WHICH THE DETECTOR IS MOUNTED, IN COMBINATION, A MOUNTING FOR THE DETECTOR HAVING A BASE, MEANS FOR SECURING THE MOUNTING TO THE CONVEYANCE, WHEN THE CONVEYANCE IS IN A LEVEL POSITION, SO THAT THE BASE IS IN A HORIZONTAL POSITION, A PENDULUM YOKE ROTATABLY MOUNTED IN SUITABLE ANTI-FRICTION BEARINGS ON AN AXIS NORMAL TO THE BASE, A SHAFT ROTATABLY MOUNTED IN SUITABLE ANTI-FRICTION BEARINGS DISPOSED ON THE YOKE, THE AXIS OF ROTATION BEING NORMAL TO THE AXIS OF ROTATION OF THE YOKE, A PAIR OF ALIGNED PENDULUMS SECURED TO THE SHAFT ONE BEING AT EACH END OF THE SHAFT, WHEREBY ANY MOVEMENT OF THE CONVEYANCE FROM ITS LEVEL POSITION WILL, THROUGH SAID PENDULUMS, CAUSE SAID YOKE TO ROTATE JUST SUFFICIENT TO MAINTAIN THE SHAFT AXIS HORIZONTAL AND CAUSE THE SHAFT TO ROTATE IN PROPORTION TO THE CHANGE OF ATTITUDE OF THE CONVEYANCE, AND ELECTRIC MEANS FOR INDICATING THE AMOUNT OF CHANGE IN ATTITUDE OF THE CONVEYANCE AS A FUNCTION OF THE ANGLE OF DEPARTURE OF THE CONVEYANCE FROM ITS LEVEL POSITION.