|4320872||Anti-ice control system|
An anti-ice control system for controlling flow of heated air in response to the temperature of the heated air and ambient air....
|4034911||Burner control system|
A burner control system for a hot water boiler is responsive to both outlet water temperature and return water temperature to provide a relatively constant outlet water temperature regardless of variations in heat output requirements. A first thermistor r...
|3987642||Control valve for vehicle air conditioning systems|
A control valve for controlling refrigerant circulation in a vehicle air conditioning system has an inlet port and an outlet port for connection to the evaporator and the compressor inlet respectively of the system, and a valve controlling communication b...