Nventors

Claim 1

IN AN AUTOMATIC CONTROL FOR DELIVERY OF MATERIALS FROM A PLURALITY OF BULK SOURCES TO A COMMON RECEIVING MEANS, A BRIDGE CIRCUIT CONNECTABLE TO A POWER SOURCE AND HAVING A PRESET ARM AND A DELIVERY RESPONSIVE ARM, SAID DELIVERY RESPONSIVE ARM INCLUDING A POTENTIOMETER HAVING A MOVABLE CONTACT MEANS COUPLED TO THE RECEIVING MEANS AND POSITIONED IN ACCORDANCE WITH THE MATERIAL RECEIVED THEREIN, SAID PRESET ARM INCLUDING A PLURALITY OF SERIES CONNECTABLE PRESET POTENTIOMETERS HAVING SEPARABLY MOVABLE CONTACT MEANS FOR POSITIONING IN ACCORDANCE WITH THE SEPARATE QUANTITY OF MATERIAL TO BE DELIVERED FROM THE BULK SOURCES, SAID PRESET ARM FURTHER INCLUDING A DISCHARGE SENSING POTENTIOMETER HAVING A MOVABLE CONTACT MEANS, AND A STEPPING SWITCH HAVING A FIRST SWITCH BANK TO SEQUENTIALLY OPERABLY CONNECT THE SERIES CONNECTABLE PRESET POTENTIOMETER IN THE BRIDGE CIRCUIT AND THEREAFTER THE DISCHARGE SENSING POTENTIOMETER AND HAVING A SECOND SWITCH BANK OPERATED CONCURRENTLY WITH SAID FIRST SWITCH BANK TO SEQUENTIALLY INSERT THE SEVERAL POTENTIOMETERS IN SAID SERIES OF PRESET POTENTIOMETERS, AND MEANS OPERATED BY THE OUTPUT OF THE BRIDGE CIRCUIT TO CONTROL DELIVERY OF MATERIAL FROM THE BULK SOURCES IN ACCORDANCE WITH THE OUTPUT OF THE BRIDGE CIRCUIT AND TO ACTUATE SAID STEPPING SWITCH TO AUTOMATICALLY DELIVER MATERIAL FROM SAID BULK SOURCES IN ACCORDANCE WITH THE SEPARATE SETTINGS OF SAID PRESET POTENTIOMETERS AND TO RESET THE STEPPING SWITCH IN RESPONSE TO DISCHARGE OF MATERIAL FROM THE COMMON RECEIVING MEANS.