Heat recuperator with compensator for pressure operated fuel regulator

Claim 1

The combination of a heat recuperator and a compensator for a pressure operated fuel regulator, the recuperator having means for heating air to be used for combustion of fuel the flow of which is controlled by the fuel regulator, means for supplying recuperator-heated air to the compensator, means for delivering outlet pressure from the compensator to the fuel regulator, the compensator comprising a housing having an opening for bleeding air therethrough, a tapered plug in the opening, the tapered plug being fastened to a thermostatic metal within the housing, the cross sectional area of the plug being less than the area of the opening, the clearance around the plug being a free flow area through which air bleeds out of the compensator, the thermostatic metal being heated by air entering the compensator so that when the temperature of the air increases, the thermostatic metal is heated and deflected and displaces the plug within the opening, thereby increasing the free flow area and bleeding more air out of the compensator, thereby increasing the pressure drop across the compensator.