(under subclass 89) Apparatus in which the means sensing the condition in one burner feed line controls the flow of a second to the burner.
SEE OR SEARCH CLASS
137, Fluid Handling,
87.01+, for a fluid handling system not specialized to combustion or fluid emission in which flow in one feed line is proportional to or correlated with that in a second flow line by movable means in one of the lines responsive to means sensing a variable condition in the other.
239, Fluid Sprinkling, Spraying, and Diffusing,
61+, for a fluid handling system with a flow modifying fluid emitter not specialized to combustion having movable means responsive to some variable condition in a first fluid which causes a change in a second fluid flow or in a control means, to maintain the relative amounts thereof in a selected ratio.
