Solid state ice bank control

Claim 1

A CONTROL SYSTEM FOR DETECTING THE CONDITION OF A FREEZING MEDIA AND CONTROLLING AN APPARATUS ADAPTED TO CONTROL CONDITIONS OF THE FREEZING MEDIA, A PULSATING DIRECT CURRENT SOURCE OF ELECTRICAL ENERGY AND IMPEDANCE MEANS VARYING THE MAGNITUDE OF ITS IMPEDANCE IN ACCORDANCE WITH PREDETERMINED FREEZING AND NONFREEZING CONDITIONS OF THE MEDIA COMPRISING OUTPUT CONTROLLING MEANS, CONTROLLER MEANS CONNECTED IN CIRCUIT WITH SAID OUTPUT CONTROL ELEMENTS AND OPERATIVELY CONNECTED WITH THE APPARATUS FOR CONTROLLING THE OPERATION OF THE APPARATUS IN RESPONSE TO AN ELECTRICAL CONDITION OF SAID CONTROLLING MEANS, AND CONDITION RESPONSIVE CONTROL CIRCUIT MEANS COUPLED IN CONTROLLING RELATION WITH SAID CONTROLLING MEANS IN RESPONSE TO THE PREDETERMINED FREEZING AND NONFREEZING CONDITIONS OF THE MEDIA INCLUDING CONDITION SENSING CIRCUIT MEANS CONNECTED TO THE IMPEDANCE MEANS FOR PRODUCING A CONDITION SIGNAL IN RESPONSE TO VARIATIONS OF THE IMPEDANCE MEANS, SIGNAL PRODUCING CIRCUIT MEANS FOR PRODUCING A CONTROL SIGNAL IN RESPONSE TO SAID CONDITION SIGNAL, SAID SIGNAL PRODUCING MEANS VARYING THE CONDUCTIVE CONDITIONS OF SAID CONTROLLING MEANS IN RESPONSE TO SAID CONTROLLING MEANS, AND REACTIVE IMPEDANCE MEANS IN CIRCUIT BETWEEN SAID CONDITION SENSING CIRCUIT MEANS AND SAID SIGNAL PRODUCING CIRCUIT MEANS FOR BLOCKING DIRECT CURRENT COMPONENTS OF THE PULSATING SOURCE OF ELECTRICAL ENERGY FROM SAID CONDITION SENSING CIRCUIT MEANS.