Blower control means for motor vehicle heating and ventilating systems

Claim 1

A BLOWER CONTROL MEANS FOR A MOTOR VEHICLE HEATING AND VENTILATING SYSTEM COMPRISING A HEAT EXCHANGER INCLUDING A HOUSING HAVING A CORE THEREIN AND INLET AND OUTLET AIR OPENINGS IN THE WALL OF SAID HOUSING; CONDUIT MEANS FOR CIRCULATING A HEAT-CONTAINING MEDIUM THROUGH SAID CORE; VALVE MEANS IN SAID CONDUIT MEANS FOR CONTROLLING THE RATE OF FLOW OF A HEAT-CONTAINING FLUID FLOWING THROUGH SAID CORE, MANUALLY OPERABLE VALVE POSITIONING MEANS FOR ADJUSTING THE CONDITION OF SAID VALVE MEANS; A BLOWER HAVING ITS OUTLET SIDE IN COMMUNICATION WITH SAID HOUSING INLET OPENING AND ITS INLET SIDE ARRANGED TO HAVE AIR FORCED THEREIN UPON FORWARD MOVEMENT OF THE MOTOR VEHICLE; A TWO SPEED ELECTRIC MOTOR DRIVINGLY CONNECTED TO SAID BLOWER; A SOURCE OF ELECTRICAL POWER; A THREE POSITION MANUALLY OPERABLE SELECTOR SWITCH OPERATIVELY CONNECTED TO SAID SOURCE OF ELECTRICAL POWER, SAID SWITCH HAVING A "HIGH SPEED" CONTACT, A "LOW SPEED" CONTACT, AND AN "AUTOMATIC" CONTACT; A "LOW SPEED" ELECTRIC LINE ELECTRICALLY INTERCONNECTING SAID "LOW SPEED" CONTACT AND SAID MOTOR; A "HIGH SPEED" ELECTRIC LINE ELECTRICALLY INTERCONNECTING SAID "HIGH SPEED" CONTACT AND SAID MOTOR; AND AN "AUTOMATIC" LINE ELECTRICALLY INTERCONNECTING SAID "AUTOMATIC" CONTACT AND SAID MOTOR; A SPEED RESPONSIVE SWITCH CONNECTED IN SERIES WITH SAID "AUTOMATIC" LINE, SAID SWITCH BEING CLOSED WHEN THE MOTOR VEHICLE SPEED IS BELOW A PREDETERMINED VALUE AND OPEN WHEN THE VEHICLE SPEED EXCEEDS SAID PREDETERMINED VALUE; AND A SECOND SWITCH CONNECTED IN SERIES WITH SAID "AUTOMATIC" LINE OPERATIVELY CONNECTED TO SAID MANUALLY OPERABLE VALVE POSITIONING MEANS FOR ADJUSTING THE CONDITION OF SAID VALVE POSITIONING MEANS, SAID SECOND SWITCH BEING OPENED WHEN SAID VALVE POSITIONING MEANS IS IN A POSITION CORRESPONDING TO THE CLOSED CONDITION OF SAID VALVE MEANS AND BEING CLOSED IN ALL OTHER ADJUSTED POSITIONS OF SAID VALVE POSITIONING MEANS.