Device for signaling the height of a pile of iron ore and the like

Claim 1

IN AN APPARATUS FOR INDICATING THE LEVEL OF A STOCK PILE, THE COMBINATION COMPRISING: (A) A SUPPORT MEMBER; (B) AN ARM HAVING ONE END PIVOTALLY MOUNTED ON SAID SUPORT MEMBER; (C) MEANS FOR MOVING SAID ARM UPWARDLY AND DOWNWARDLY IN AN OSCILLATORY MOTION; (D) A PLATFORM HAVING ONE END PIVOTALLY MOUNTED ON SAID SUPPORT MEMBER AND THE OTHER END NORMALLY DISPOSED ON A STOP MEMBER AND BEING MOVABLE UPWARDLY FROM SAID STOP MEMBER IN A SWINGING MOVEMENT ABOUT THE PIVOT ON SAID ONE END; (E) SAID MEANS FOR MOVING SAID ARM BEING MOUNTED ON SAID PLATFORM; (F) MEANS CARRIED BY SAID ARM ENGAGABLE WITH THE LEVEL OF A STOCK PILE WHEN THE LEVEL OF A STOCK PILE REACHES A PREDETERMINED HEIGHT, WHERBY SAID ARM IS RETARDED IN THE DOWNWARD MOVEMENT AND A REACTIVE FORCE IS EXERTED ON SAID PLATFORM TO PIVOT THE SAME AND CREATE A SIGNAL; AND, (G) A DASH POT MEANS OPERATIVELY CONNECTED TO SAID PLATFORM AND MEANS FOR MOVING SAID ARM TO RESTRICT THE DOWNWARD MOVEMENT OF THE PLATFORM AND PROVIDE FREE UPWARD MOVEMENT FOR THE PLATFORM.