Gas oven burner control method and apparatus
AssigneeBanner Engineering & Sales, Inc.
InventorJoseph M. Day
Life of this patent
Estimating the term…
Abstract
A method and apparatus for relighting a gas oven following interruption in the operation thereof due to a temporary failure or reduction in the energy level of a source of electric energy comprises instantaneously disconnecting the delivery of pressurized gas to the oven in response to a reduction in the level of the electric energy, slowly reducing the pressure of gas in the delivery system, monitoring the pressure of the gas, and restoring the delivery of fuel to the oven only if the energy supply is restored to a proper level within a short period of time and prior to a predetermined reduction of the gas pressure.
Claims23
Apparatus for controlling the delivery of a flowable, combustible fuel from a pressurized supply thereof to a fuel burner, said apparatus comprising fuel delivery means extending from said supply to said burner;
- valve means in said delivery means movable between opened and closed conditions respectively to enable and disable fuel flow from said supply to said burner;
- electric circuit means;
- main switch means for coupling and uncoupling said circuit means to a source of electric energy having a normal value, said circuit means including a plurality of components operable in predetermined sequence to connect said valve means to said energy source and move said valve means from said closed condition to said opened condition;
- disconnect means in said circuit means operable in response to a reduction from said normal value of said energy source to a lower threshold value to disconnect said valve means from said energy source and move said valve means to said closed condition;
- reset means in said circuit means operable in response to restoration of the level of said energy at least to said threshold value to effect return movement of said valve means from said closed condition to said opened condition;
- and timing means in circuit with said reset means for disabling said reset means from effecting said return movement of said valve means following the passage of a predetermined interval of time from said reduction of said energy level of said energy source.
Apparatus for controlling the delivery of flowable fuel from a pressurized supply thereof to a fuel burner;
- said apparatus comprising a conduit extending from said supply to said burner;
- first and second valves in said conduit movable between closed and opened conditions for disabling and enabling respectively fuel flow from said supply to said burner;
- electrical circuit means;
- means for coupling and uncoupling said circuit means to a source of energy having a normal value, said circuit means including a plurality of components operable in sequence following coupling of said circuit means to said energy source to effect movement of said first and second valves to said opened condition, one of said components being operable in response to a reduction in the normal level of said energy to less than a threshold level to disconnect said energy source from said first and second valves and effect movement thereof from said opened condition to said closed condition;
- reset switch means in circuit with said one component for reconnecting said first and second valves to said energy source in response to restoration thereof at least to said threshold value;
- and timing means acting on said reset switch means for disabling operation thereof following the passage of a predetermined interval of time after the said reduction in the normal level of said energy.
Apparatus for controlling the delivery of flowable fuel from a pressurized supply thereof to a fuel burner;
- said apparatus comprising a conduit extending from said supply to said burner;
- first and second valves in said conduit movable between closed and opened conditions in which said fuel respectively is disabled and enabled to flow from said supply to said burner;
- electrical circuit means;
- means for coupling and uncoupling said circuit means to a source of electric energy having a normal value, said circuit means including a plurality of components operable in sequence following coupling of said circuit means to said energy source to effect movement of said first and second valves to said opened condition, one of said components being operable in response to a reduction in the normal value of said energy to less than a threshold level to disconnect said energy source from said first and second valves and effect movement thereof from said opened condition to said closed condition;
- reset switch means in circuit with said one component for reconnecting said first and second valves to said energy source in response to restoration thereof to at least said threshold value;
- and timing means acting on said reset switch means for disabling operating thereof following the passage of a predetermined interval of time after the reduction in the normal value of said energy.
Apparatus for temporarily or permanently terminating the flow of combustible, flowable fuel from a supply thereof to a fuel burner, said apparatus comprising fuel delivery means for delivering fuel from said supply to said burner;
- a source of electric energy having a normal value;
- an electric circuit;
- means for coupling said circuit to said energy source;
- fuel valve means in said delivery means for selectively enabling and disabling fuel flow to said burner;
- electrical valve control means in said circuit operable to move said fuel valve means to a first position enabling fuel flow to said burner;
- disconnect means in said circuit operable in response to a reduction in the value of said energy source to a level less than a predetermined threshold level to disconnect said valve control means from said energy source and effect movement of said fuel valve means to a second position disabling fuel flow to said burner;
- reset means in said circuit operable to reconnect said fuel valve control means to said energy source;
- and timing means acting on said reset means for preventing said reset means from reconnecting said fuel valve control means to said energy source following the passage of a predetermined time interval commencing with the disconnection of said fuel valve control means from said circuit.
A method of interrupting the flow of a flowable combustible fuel from a supply thereof to a fuel burner comprising establishing pressurized fuel flow from said supply to said burner;
- monitoring the level of electrical energy from a source thereof;
- terminating the flow of said fuel to said burner in response to a reduction in the energy level of said source to a level less than a predetermined threshold;
- timing a period of time commencing with the termination of said flow;
- and reestablishing the flow of said fuel to said burner only if the energy level of said source rises to said predetermined threshold within a predetermined time interval following the termination of said flow.
Dependencies are inferred from the claim text.