Gas-electric refrigerating system

Claim 1

A REFRIGERATING SYSTEM OF THE TYPE ALTERNATIVELY EMPLOYING GAS OR ELECTRICITY AS POWER SOURCES, IN WHICH A REFRIGERATOR IS COOLED BY A REFRIGERATION UNIT CONTAINED THEREIN, SAID REFRIGERATION UNIT COMPRISING A GENERATOR TUBE, A GAS BURNER HEATING ELEMENT DISPOSED ADJACENT TO SAID GENERATOR TUBE FOR HEATING SAID GENERATOR TUBE, MEANS FOR SUPPLYING GAS TO SAID BURNER HEATING ELEMENT, A FIRST CONTROL ELEMENT COUPLED TO SAID GAS SUPPLY MEANS AND TO SAID GAS BURNER HEATING ELEMENT AND RESPONSIVE TO THE TEMPERATURE OF SAID REFRIGERATOR FOR CONTROLLING THE SUPPLY OF GAS, TO SAID BURNER HEATING ELEMENT IN ACCORDANCE THEREWITH, AN ANNULAR ELECTRICAL RESISTANCE HEATING ELEMENT MOUNTED ON THE OUTER SURFACE OF SAID GENERATOR TUBE FOR HEATING SAID GENERATOR TUBE, MEANS FOR CONDUCTING ELECTRICAL ENERGY TO SAID RESISTANCE HEATING ELEMENT, A SECOND CONTROL ELEMENT COUPLED TO SAID ELECTRICAL ENERGY CONDUCTING MEANS AND TO SAID RESISTANCE HEATING ELEMENT AND RESPONSIVE TO THE TEMPERATURE OF SAID REFRIGERATOR FOR CONTROLLING THE SUPPLY OF ELECTRICAL ENERGY TO SAID RESISTANCE HEATING ELEMENT IN ACCORDANCE THEREWITH, AND SWITCHING MEANS CONNECTED TO SAID GAS ENERGY SUPPLY MEANS AND TO SAID ELECTRICAL ENERGY CONDUCTING MEANS AND ADAPTED SIMULTANEOUSLY TO CONNECT A FIRST OF SAID ENERGY MEANS TO ITS ASSOCIATED HEATING ELEMENT AND TO DISCONNECT THE SECOND OF SAID ENERGY MEANS FROM ITS ASSOCIATED HEATING ELEMENT OR TO CONNECT THE SECOND OF SAID ENERGY MEANS TO ITS ASSOCIATED HEATING ELEMENT AND DISCONNECT THE FIRST OF SAID ENERGY MEANS FROM ITS ASSOCIATED HEATING ELEMENT, IN WHICH THE SWITCHING MEANS COMPRISES A MECHANICALL ACTUATED ELECTRICAL SWITCH COUPLED TO SAID ELECTRICAL ENERGY CONDUCTING MEANS AND TO SAID RESISTANCE HEATING ELEMENT FOR COMPLETING AND INTERRUPTING ELECTRICAL CONTINUITY THERETHROUGH, A ROTATABLE SHAFT, A CAM MOUNTED ON SAID SHAFT AND ROTATABLE THEREWITH, SAID CAM BEING MECHANICALLY COUPLED TO SAID ELECTRICAL SWITCH FOR ACTUATING SAID SWITCH TO COMPLETE ELECTRICAL CONTINUITY THERETHROUGH AT FIRST PARTICULAR ANGULAR ORIENTATIONS OF SAID ROTATABLE CAM AND TO INTERRUPT ELECTRICAL CONTINUITY AT OTHER ORIENTATIONS OF SAID ROTATABLE CAM, A VALVE HAVING A ROTATABLE PLUG WITH A PASSAGE THERETHROUGH, SAID VALVE COUPLED TO SAID GAS SUPPLY MEANS AND TO SAID GAS BURNER HEATING ELEMENT FOR PERMITTING THE FLOW OF GAS THROUGH SAID VALVE AT SECOND PARTICULAR ANGULAR ORIENTATIONS OF SAID ROTATABLE PLUG AND FOR OBSTRUCTING THE FLOW OF GAS THROUGH SAID VALVE AT OTHER ORIENTATIONS OF SAID ROTATABLE PLUG, SAID PLUG MOUNTED ON SAID SHAFT AND ROTATABLE THEREWITH, SAID CAM AND SAID PLUG BEING MOUNTED ON SAID SHAFT SUCH THAT SAID FIRST AND SECOND PARTICULAR ORIENTATIONS OCCUR AT DIFFERENT ANGULAR POSITIONS OF SAID SHAFT.