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AssigneeRobertshaw Controls Company
InventorsJay R. Katchka, George A. Yeaman, Richard W. McKinney
Estimating the term…
A control device for supplying fuel to a burner means, a system therefor and methods of making the same are provided, the device comprising a housing having an inlet for being interconnected to a source of fuel and having an outlet for being interconnected to the burner, first and second control valves carried by the housing and being in series to connect the inlet to the outlet only when both of the control valves are in an open condition thereof, each control valve comprising a movable valve member resiliently biased closed and an independent electromagnetic valve member latching unit energizable to hold its respective valve member open and deenergizable to allow its respective valve member to close, each control valve having a movable member to open its respective valve member to a latching position so as to be held open by its respective latching unit when its respective latching unit is energized, and a single manually movable actuator carried by the housing and having structure operatively interconnecting the movable members together so that the valve members will move substantially in unison to their latching positions as the actuator is being moved to an actuated position thereof.
In a control system supplying fuel to a main burner means from a source of said fuel, said system comprising a fuel line means leading from said source to said main burner means, said fuel line means having a branch means being interconnected to a pilot burner means for said main burner means, and first and second control valve means disposed in series in said line means to connect said source to said main burner means only when both of said control valve means are in an open condition thereof, each said control valve means comprising a movable valve member resiliently biased closed and an independent electromagnetic valve member latching means energizable to hold its respective said valve member open and deenergizable to allow its respective said valve member to close, each said control valve means having movable means to open its respective said valve member to a latching position so as to be held open by its respective said latching means when its respective said latching means is energized, the improvement wherein means are operatively interconnected to said source control valve means so that said control valve means are adapted to interconnect said source to said branch means only when both of said control valve means are in an open condition thereof.
Dependencies are inferred from the claim text.