(under subclass 188) Apparatus wherein the sensed state, property, or characteristic is the force per unit area existing at a point within the combustion chamber or in fluid lines connected thereto.
SEE OR SEARCH THIS CLASS, SUBCLASS:
103, for a subcombination fuel feeder controlled by boiler pressure.
SEE OR SEARCH CLASS
266, Metallurgical Apparatus,
89, for metallurgical treating apparatus provided with control means responsive to pressure variations.
431, Combustion, 19, for a fluid fuel burner provided with control means responsive to sensed pressure within its burning chamber.
