Fuel control system and parts therefor or the like

Claim 2

In a fuel control system having a source of fuel adapted to be interconnected by conduit means to a burner means, the improvement comprising a first valve means in said conduit means for controlling fuel flow therethrough, a second valve means in said conduit means for controlling fuel flow therethrough and being disposed intermediate said first valve means and said burner means, and electrically operated means operatively interconnected to said valve means so that when said electrically operated means is initially energized the same initially opens said first valve means while maintaining said second valve means in its closed position to prevent fuel flow to said burner means, said electrically operated means having electrically operated ignition means which when subsequently energized to ignition condition causes opening of said second valve means while holding said first valve means in its opened position whereby said ignition means ignites fuel issuing from said burner means said electrically operated means having a solenoid coil for operating said first valve means and a holding circuit for maintaining said first valve means in its opened position after said coil has been energized to open said first valve means, said electrically operated means only effectively operating said holding circuit for maintaining said first valve means in its opened position after said ignition means is energized to ignition condition.

Claim 3

In a fuel control system as set forth in claim 1, said electrically operated means having an electrical power source and having switch means placing said coil across said power source when said electrically operated means is initially energized to cause opening of said first valve means.

Claim 4

In a fuel control system as set forth in claim 2, said switch means effectively shunting out said holding circuit from said power source when said switch means places said coil across said power source and before said ignition means is energized to ignition condition.

Claim 5

In a fuel control system as set forth in claim 2, said switch means being adapted to place said coil and said holding circuit in series across said power source when said ignitIon means is subsequently energized to ignition condition.

Claim 6

In a fuel control system as set forth in claim 4, said holding circuit when placed in series with said coil across said power source being energized to a condition to maintain said first valve in its open condition.

Claim 7

In a fuel control system as set forth in claim 1, said electrically operated means having a solenoid coil for operating said second valve means.

Claim 8

In a fuel control system as set forth in claim 6, said electrically operated means having an electrical power source and having switch means placing said ignition means across said power source when said electrically operated means is initially energized to cause opening of said first valve means whereby said ignition means is energized.

Claim 9

In a fuel control system as set forth in claim 7, said switch means effectively shunting out said coil from said power source when said switch means places said ignition means across said power source whereby said coil is ineffective for opening said second valve means.

Claim 10

In a fuel control system as set forth in claim 7, said switch means being adapted to place said coil and said ignition means in series across said power source when said ignition means is subsequently energized to ignition condition.

Claim 11

In a fuel control system as set forth in claim 9, said coil when placed in series with said ignition means across said power source being energized to a condition to open said second valve means.

Claim 12

In a fuel control system having a source of fuel adapted to be interconnected by conduit means to a burner means, the improvement comprising a first valve means in said conduit means for controlling fuel flow therethrough, a second valve means in said conduit means for controlling fuel flow therethrough and being disposed intermediate said first valve means and said burner means, and electrically operated means operatively interconnected to said valve means so that when said electrically operated means is initially energized the same initially opens said first valve means while maintaining said second valve means in its closed position to prevent fuel flow to said burner means, said electrically operated means having electrically operated ignition means which when subsequently energized to ignition condition causes opening of said second valve means while holding said first valve means in its opened position whereby said ignition means ignites fuel issuing from said burner means, said electrically operated means having an electrical power source and having switch means, said electrically operated means having a first solenoid coil for operating said first valve means and having a holding circuit for maintaining said first valve means in its opened position after said first coil has been energized to open said first valve means, said electrically operated means having a second solenoid coil for operating said second valve means, said switch means having means for sensing an ignition condition of said ignition means, said switch means when sensing a nonignition condition of said ignition means and when said electrically operated means is initially energized placing said first coil across said power source to cause opening of said first valve means while simultaneously placing said ignition means across said power source to energize said ignition means and effectively shunting out said holding circuit and said second coil so that said second valve means remains closed.

Claim 13

In a fuel control system having a source of fuel adapted to be interconnected by conduit means to a burner means, the improvement comprising a first valve means in said conduit means for controlling fuel flow therethrough, a second valve means in said conduit means for controlling fuel flow therethrough and being disposed intermediate said first valve means and said burner means, and electrically operated means operatively interconnected to said valve means so that when said electrically operated means is initially energized the same initially opens said first valve means while maintaining said second valve means in its closed position to prevent fuel flow to said burner means, said electrically operated means having electrically operated ignition means which when subsequently energized to ignition condition causes opening of said second valve means while holding said first valve means in its opened position whereby said ignition means ignites fuel issuing from said burner means, said electrically operated means having an electrical power source and having switch means, said electrically operated means having a first solenoid coil for operating said first valve means and having a holding circuit for maintaining said first valve means in its opened position after said first coil has been energized to open said first valve means, said electrically operated means having a second solenoid coil for operating said second valve means, said switch means having means for sensing an ignition condition of said ignition means, said switch means when sensing a nonignition condition of said ignition means and when said electrically operated means is initially energized placing said first coil across said power source to cause opening of said first valve means while simultaneously placing said ignition means across said power source to energize said ignition means and effectively shunting out said holding circuit and said second coil so that said second valve means remains closed.

Claim 14

In a fuel control system having a source of fuel adapted to be interconnected by conduit means to a burner means, the improvement comprising a first valve means in said conduit means for controlling fuel flow therethrough, a second valve means in said conduit means for controlling fuel flow therethrough and being disposed intermediate said first valve means and said burner means, and electrically operated means operatively interconnected to said valve means so that when said electrically operated means is initially energized the sAme initially opens said first valve means while maintaining said second valve means in its closed position to prevent fuel flow to said burner means, said electrically operated means having electrically operated ignition means which when subsequently energized to ignition condition causes opening of said second valve means while holding said first valve means in its opened position whereby said ignition means ignites fuel issuing from said burner means, said electrically operated means having an electrical power source and having switch means, said electrically operated means having a first solenoid coil for operating said first valve means and having a holding circuit for maintaining said first valve means in its opened position after said first coil has been energized to open said first valve means, said electrically operated means having a second solenoid coil for operating said second valve means, said switch means having means for sensing an ignition condition of said ignition means, said switch means when sensing a nonignition condition of said ignition means and when said electrically operated means is initially energized placing said first coil across said power source to cause opening of said first valve means while simultaneously placing said ignition means across said power source to energize said ignition means and effectively shunting out said holding circuit and said second coil so that said second valve means remains closed, said switch means thereafter when sensing an ignition condition of said ignition means placing said first coil and said holding circuit in series across said power source so that said holding circuit maintains said first valve means in its open position while simultaneously placing said ignition means and said second coil in series across said power source to cause opening of said second valve means so that fuel can issue from said burner means and be ignited by said ignition means.

Claim 15

In a fuel control system having a source of fuel adapted to be interconnected by conduit means to a burner means, the improvement comprising a first valve means in said conduit means for controlling fuel flow therethrough, a second valve means in said conduit means for controlling fuel flow therethrough and being disposed intermediate said first valve means and said burner means, and electrically operated means operatively interconnected to said valve means so that when said electrically operated means is initially energized the sAme initially opens said first valve means while maintaining said second valve means in its closed position to prevent fuel flow to said burner means, said electrically operated means having electrically operated ignition means which when subsequently energized to ignition condition causes opening of said second valve means while holding said first valve means in its opened position whereby said ignition means ignites fuel issuing from said burner means, said electrically operated means having an electrical power source and having switch means, said electrically operated means having a first solenoid coil for operating said first valve means and having a holding circuit for maintaining said first valve means in its opened position after said first coil has been energized to open said first valve means, said electrically operated means having a second solenoid coil for operating said second valve means, said switch means having means for sensing an ignition condition of said ignition means, said switch means when sensing a nonignition condition of said ignition means and when said electrically operated means is initially energized placing said first coil across said power source to cause opening of said first valve means while simultaneously placing said ignition means across said power source to energize said ignition means and effectively shunting out said holding circuit and said second coil so that said second valve means remains closed, said switch means thereafter when sensing an ignition condition of said ignition means placing said first coil and said holding circuit in series across said power source so that said holding circuit maintains said first valve means in its open position while simultaneously placing said ignition means and said second coil in series across said power source to cause opening of said second valve means so that fuel can issue from said burner means and be ignited by said ignition means.

Claim 16

In a fuel control system as set forth in claim 12, said switch means having a fixed contact means electrically interconnected to one side of said second coil and to one side of said ignition means, the other side of said second coil being electrically interconnected to one lead of said power source and the other side of said ignition means being electrically interconnected to the other lead of said power source, said holding circuit having one side thereof electrically interconnected to said one power source lead and the other side thereof electrically interconnected to one side of said first coil, the other side of said first coil being electrically interconnected to said other power source lead, said switch means having a pair of movable contact means respectively cooperable with said fixed contact means, one of said movable contact means being electrically interconnected to said one power source lead and the other movable contact means being electrically interconnected between said other side of said holding circuit and said one side of said first coil.

Claim 17

In a fuel control system as set forth in claim 13, said fixed contact means of said switch means being a central contact means and said movable contact means respectively being disposed on opposite sides of said central contact means.

Claim 18

An electrical control system for a fuel burning apparatus or the like comprising a first solenoid coil for operating a first valve means, a second solenoid coil for operating a second valve means, and electrically operated means operatively interconnected to said coils so that when said electrically operated means is initially energized the same initially energized said first coil for opening said first valve means while maintaining said second coil in a condition to prevent opening of said second valve means, said electrically operated means having electrically operated ignition means which when subsequently energized to ignition condition is adapted to cause energizing of said second coil to open said second valve means while holding said first valve meanS in its opened position said electrical operated means having a holding circuit for maintaining said first valve means in its open position after said first coil has been energized to open said first valve means, said electrically operated means only effectively operating said holding circuit by placing said holding circuit and said first coil in electrical series for maintaining said first valve means in its open position after said ignition means is energized to ignition condition.

Claim 19

An electrical control system for a fuel burning apparatus or the like comprising a first solenoid coil for operating a first valve means, a second solenoid coil for operating a second valve means, and electrically operated means operatively interconnected to said coils so that when said electrically operated means is initially energized the same initially energized said first coil for opening said first valve means while maintaining said second coil in a condition to prevent opening of said second valve means, said electrically operated means having electrically operated ignition means which when subsequently energized to ignition condition is adapted to cause energizing of said second coil to open said second valve means while holding said first valve meanS in its opened position said electrical operated means having a holding circuit for maintaining said first valve means in its open position after said first coil has been energized to open said first valve means, said electrically operated means only effectively operating said holding circuit by placing said holding circuit and said first coil in electrical series for maintaining said first valve means in its open position after said ignition means is energized to ignition condition.

Claim 20

An electrical control system as set forth in claim 15, said electrically operated means having a pair of power source leads and having switch means for placing said first coil across said power source leads when said electrically operated means is initially energized to cause opening of said first valve means.

Claim 21

An electrical control system as set forth in claim 16, said switch means being adapted to effectively shunt out said holding circuit from said power leads when said switch means places said first coil across said power source leads and before said ignition means is energized to ignition condition.

Claim 22

An electrical control system as set forth in claim 16, said switch means being adapted to place said first coil and said holding circuit in series across said power source leads when said ignition means is subsequently energized to ignition condition.

Claim 23

An electrical control system as set forth in claim 18, said holding circuit when placed in series with said first coil across said power source leads by said switch means being adapted to be energized to a condition to maintain said first valve means in its opened condition.

Claim 24

An electrical control system as set forth in claim 15, said electrically operated means having a pair of power source leads and having switch means adapted to place said ignition means across said power source leads when said electrical operated means is initially energized to cause opening of said first valve means whereby said ignition means is adapted to be energized.

Claim 25

An electrical control system as set forth in claim 20, said switch means being effective to shunt out said second coil from said power leads when said switch means places said ignition means across said power source whereby said second coil is ineffective for opening said second valve means.

Claim 26

An electrical control system as set forth in claim 20, said switch means being adapted to place said second coil and said ignition means in series across said power source leads when said ignition means is subsequently energized to ignition condition.

Claim 27

An electrical control system as set forth in claim 22, said second coil when placed in series with said ignition means across said power source leads by said switch means being adapted to be energized to a condition to open said second valve means.

Claim 28

An electrical control system for a fuel burning apparatus or the like comprising a first solenoid coil for operating a first valve means, a second solenoid coil for operating a second valve means, and electrically operated means operatively interconnected to said coils so that when said electrically operated means is initially energized the same initially energizes said first coil for opening said first valve means while maintaining said second coil in a condition to prevent opening of said second valve means, said electrically operated means having electrically operated ignition means which when subsequently energized to ignition condition is adapted to cause energizing of said second coil to open said second valve means while holding said first valve means in its opened position, said electrically operated means having a pair of power source leads and having switch means, said electrically operated means having a holding circuit for maintaining said first valve means in its open position after said first coil has been energized to open said first valve means, said switch means having means for sensing an ignition condition of said ignition means, said switch meaNs when sensing a nonignition condition of said ignition means and when said electrically operated means is initially energized placing said first coil across said power source leads to be adapted to cause opening of said first valve means while simultaneously placing said ignition means across said power source leads to be adapted to energize said ignition means and effectively shunt out said holding circuit and said second coil from said power source leads so that said second valve means would remain closed.

Claim 29

An electrical control system for a fuel burning apparatus or the like comprising a first solenoid coil for operating a first valve means, a second solenoid coil for operating a second valve means, and electrically operated means operatively interconnected to said coils so that when said electrically operated means is initially energized the same initially energizes said first coil for opening said first valve means while maintaining said second coil in a condition to prevent opening of said second valve means, said electrically operated means having electrically operated ignition means which when subsequently energized to ignition condition is adapted to cause energizing of said second coil to open said second valve means while holding said first valve means in its opened position, said electrically operated means having a pair of power source leads and having switch means, said electrically operated means having a holding circuit for maintaining said first valve means in its open position after said first coil has been energized to open said first valve means, said switch means having means for sensing an ignition condition of said ignition means, said switch meaNs when sensing a nonignition condition of said ignition means and when said electrically operated means is initially energized placing said first coil across said power source leads to be adapted to cause opening of said first valve means while simultaneously placing said ignition means across said power source leads to be adapted to energize said ignition means and effectively shunt out said holding circuit and said second coil from said power source leads so that said second valve means would remain closed.

Claim 30

An electrical control system as set forth in claim 24, said switch means thereafter and when sensing an ignition condition of said ignition means being adapted to place said first coil and said holding circuit in series across said power source leads so that said holding circuit is adapted to maintain said first valve means in its open position while simultaneously placing said ignition means and said second coil in series across said power source leads to cause opening of said second valve means so that fuel can be ignited by said ignition means.

Claim 31

An electrical control system as set forth in claim 25, said switch means having a fixed contact means electrically interconnected to one side of said second coil and to one side of said ignition means, the other side of said second coil being electrically interconnected to one power source lead and the other side of said ignition means being electrically interconnected to the other power source lead, said holding circuit having one side thereof electrically interconnected to said one power source lead and the other side thereof electrically interconnected to one side of said first coil, the other side of said first coil being electrically interconnected to said other power source lead, said switch means having a pair of movable contact means respectively cooperable with said fixed contact means, one of said movable contact means being electrically interconnected to said one power source lead and the other movable contact means being electrically interconnected between said other side of said holding circuit and said one side of said first coil.

Claim 32

An electrical control system as set forth in claim 26, said fixed contact means of said switch means being a central contact means and said movable contact means respectively being disposed on opposite sides of said central contact means.