Automatic valves

Claim 1

AN ADJUSTING DEVICE COMPRISING AN ACTUATING ARM ADAPTED TO BE PIVOTED TO A BODY AND TO EXTEND LATERALLY THEREFROM; A SPRING SUPPORTING MEMBER ADAPTED TO BE SECURED TO THE BODY AND TO BE SPACED FROM SAID ARM AXIALLY OF THE BODY, SAID ARM HAVING AN ELONGATED EDGE ON THE SIDE THEREOF OPPOSITE FROM SAID SUPPORTING MEMBER; A TENSION SPRING HAVING ONE END ATTACHED TO SAID SUPPORTING MEMBER, SAID SPRING EXTENDING TOWARD SAID ARM AND AT LEAST GENERALLY IN THE PLANE OF PIVOTAL MOVEMENT OF SAID ARM; A CARRIER MEMBER INCLUDING AT LEAST ONE PORTION DISPOSED BESIDE SAID ARM AND DIRECTED AT LEAST GENERALLY TOWARD SAID SPRING; A ROTATARY ADJUSTING MEMBER ROTATABLY MOUNTED ON SAID CARRIER AND HAVING A PERIPHERAL PORTION DISPOSED IN ROLLING ENGAGEMENT WITH SAID ELONGATED EDGE OF SAID ARM, SAID ADJUSTING MEMBER BEING DISPOSED WITH ITS AXIS OF ROTATION EXTENDING TRANSVERSELY RELATIVE TO SAID ARM, THE OTHER END OF SAID SPRING BEING CONNECTED TO SAID PORTION OF SAID CARRIER AND SPRING BEING OPERATIVE TO MAINTAIN SAID PERIPHERAL PORTION OF SAID ADJUSTING MEMBER IN ENGAGEMENT WITH SAID ELONGATED EDGE OF SAID ARM AND TO BIAS SAID ARM PIVOTALLY IN ONE DIRECTION; MEANS OPERATIVELY ARRANGED TO RESTRAIN SAID ROTARY MEMBER AGAINST UNDESIRED ROTATION, AND MEANS WHEREBY SAID ADJUSTING MEMBER CAN ROTATED MANUALLY TO CAUSE SAID ADJUSTING MEMBER, AND THEREFORE SAID OTHER END OF SAID SPRING, TO TRAVEL ALONG SAID ACTUATING ARM.