Bin level indicating device

Claim 1

A LEVEL RESPONSIVE DEVICE COMPRISING A MOUNTING PLATE, A YOKE ASSEMBLY INCLUDING A SENSING ROD HAVING A SENSING ELEMENT AT ONE END AND TWO YOKE ARMS AT THE OTHER END, BEARING MEANS FOR MOUNTING SAID SENSING ROD ON SAID MOUNTING PLATE AT AN INTERMEDIATE POINT FOR OSCILLATION IN A GIVEN PLANE, SAID SENSING ARM EXTENDING THROUGH SAID MOUNTING PLATE, A CAM DISPOSED BETWEEN SAID YOKE ARMS, A CAM FOLLOWER PIVOTALLY MOUNTED ON EACH YOKE ARM FOR ENGAGING THE OPPOSITE SIDESD OF SAID CAM, SPRING MEANS URGING EACH OF SAID CAM FOLLOWERS INTO ENGAGEMENT WITH SAID CAM TO MAINTAIN SAID YOKE ASSEMBLY IN A CENTERED POSITION RELATIVE TO THE PERIPHERY OF SAID CAM, BUT PERMITTING RELATIVE DISPLACEMENT OF SAID YOKE ASSEMBLY WITH RESPECT TO SAID CAM PERIPHERY, MEANS FOR DRIVING SAID CAM TO CAUSE OSCILLATION OF SAID YOKE ASSEMBLY WHILE THE LATTER IS MAINTAINED IN SAID RELATIVELY CENTERED POSITION, AND SWITCH MEANS MOUNTED ON SAID YOKE ARMS AND ADAPTED FOR ACTUATION BY SAID RELATIVE DISPLACEMENT IN EITHER DIRECTION, THE DISPLACEMENT OF SAID YOKE ASSEMBLY FROM SAID RELATIVELY CENTERED POSITION DUE TO THE BLOCKING OF THE MOVEMENT OF SAID SENSING ELEMENT DURING THE ROTATION OF SAID CAM WILL ACTUATE SAID SWITCH MEANS.