Heating and ventilating apparatus for vehicles

Claim 1

HEATING AND VENTILATING APPARATUS FOR A VEHICLE HAVING A PASSENGER COMPARTMENT AND A WINDSHIELD, THE SAID APPARATUS COMPRISING A HOUSING, AN INLET COMPARTMENT WITHIN THE HOUSING ADAPTED TO BE SUPPLIED WITH AIR FROM OUTSIDE THE VEHICLE, A MAIN OUTLET COMPARTMENT WITHIN THE HOUSING ADAPTED TO SUPPLY AIR TO THE PASSENGER COMPARTMENT, AIR HEATING MEANS WITHIN THE HOUSING, A DIRECT CONNECTING BY-PASS PASSAGEWAY, THE MAIN OUTLET COMPARTMENT COMMUNICATING DIRECTLY THROUGH SAID BYPASS PASSAGEWAY WITH THE INLET COMPARTMENT AND ALSO THROUGH THE HEATING MEANS, AN AUXILIARY OUTLET COMPARTMENT ADAPTED TO SUPPLY AIR TO THE WINDSHIELD AND COMMUNICATING DIRECTLY BOTH WITH THE INLET COMPARTMENT AND WITH THE MAIN OUTLET COMPARTMENT, FIRST VALVE MEANS CONTROLLING THE PROPORTIONS OF AIR RESPECTIVELY FLOWING FROM THE INLET COMPARTMENT TO THE MAIN OUTLET COMPARTMENT DIRECTLY AND THROUGH THE AIR HEATING MEANS, AND SECOND VALVE MEANS CONTROLLING THE PROPORTIONS OF AIR FLOWING TO THE AUXILIARY OUTLET COMPARTMENT FROM THE INLET COMPARTMENT AND FROM THE MAIN OUTLET COMPARTMENT RESPECTIVELY.