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Safe start check circuit

Combustion – Timer – programmer – retarder or condition responsive control – With test circuit checking or analyzing flame sensing...
Patent

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Safe start fuel burner control system

Combustion – Timer – programmer – retarder or condition responsive control – With test circuit checking or analyzing flame sensing...
Patent

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Safety device for boiler comprising a time delay protected...

Combustion – Timer – programmer – retarder or condition responsive control – With test circuit checking or analyzing flame sensing...
Reexamination Certificate

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Self-checking automatic pilot fuel ignition system

Combustion – Timer – programmer – retarder or condition responsive control – With test circuit checking or analyzing flame sensing...
Patent

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Self-checking safety switch control circuit

Combustion – Timer – programmer – retarder or condition responsive control – With test circuit checking or analyzing flame sensing...
Patent

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Self-proving burner igniter with stable pilot flame

Combustion – Timer – programmer – retarder or condition responsive control – With test circuit checking or analyzing flame sensing...
Patent

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System and method for controlling the operation of a primary bur

Combustion – Timer – programmer – retarder or condition responsive control – With test circuit checking or analyzing flame sensing...
Patent

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