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US 5,551,865 AGranted
Safety shut-off device for liquid fuel burners
OwnerRichard W. Henderson, Samuel R. Hendersoninventors
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OwnerRichard W. Henderson, Samuel R. Hendersoninventors
Estimating the term…
A safety device for preventing uncontrolled burning in wick-fed liquid fuel burners employs a solenoid (76) and a thermocouple (18) in combination with a microswitch (80). When excess fuel enters the fuel chamber (40), a float (30) is urged upward, which forces a pin (28) upward, causing a microswitch (80) to open, thereby interrupting the electrical communication between the solenoid and thermocouple. As a result, a spring (24) can act to force an arm (14) upward, actuating the automatic wick extinguishing unit (42). Also, the mechanism prevents re-ignition of the wick (54) until the excess fuel is removed from the fuel chamber. When the fuel in the fuel chamber exceeds a predetermined level, a warning gauge needle (84) is deflected, alerting the user of the liquid fuel burner to a dangerous condition.
An apparatus for preventing flareup in a liquid fuel burner of the type comprising (a) a removable liquid fuel tank, (b) a fuel chamber, (c) an automatic wick extinguishing unit, and (d) a combustion chamber having a wick, where said fuel chamber carries liquid fuel from said removable tank to said wick of said combustion chamber, comprising:
A method of preventing flare-up in a liquid fuel burner of the type comprising a liquid fuel removable tank, a fuel chamber, an automatic wick extinguishing unit, and a combustion chamber having a wick, where said fuel chamber carries liquid fuel from said removable tank to said wick of said combustion chamber, comprising the steps of:
An apparatus for preventing flareup in a liquid fuel burner of the type comprising (a) a removable liquid fuel tank, (b) a fuel chamber, (c) an automatic wick extinguishing unit, and (d) a combustion chamber having a wick, where said fuel chamber carries liquid fuel from said removable tank to said wick of said combustion chamber, comprising an electrical circuit for normally preventing operation of said automatic wick extinguishing unit, wherein said electrical circuit is configured to allow said wick extinguishing unit to operate should fuel in said fuel chamber exceed a predetermined level, thereby actuating said automatic wick extinguishing unit.
Dependencies are inferred from the claim text.