Combustion – Timer – programmer – retarder or condition responsive control – Shutdown by sensed absence of flame in proving period
Reexamination Certificate
2005-07-12
2005-07-12
Clarke, Sara (Department: 3749)
Combustion
Timer, programmer, retarder or condition responsive control
Shutdown by sensed absence of flame in proving period
C431S074000, C034S551000
Reexamination Certificate
active
06916170
ABSTRACT:
An apparatus for controlling gas valves in a gas drier is provided. The apparatus includes an igniter, a closed flame detection switch and a sustaining relay. The igniter, which starts a flame, connects to a first terminal which provides a power signal with respect to a neutral terminal. The closed flame detection switch is connected between the igniter and the neutral terminal thereby receiving the power signal via the igniter. The closed flame detection switch also detects a flame by opening. The sustaining relay provides an alternative path of conduction with respect to the closed flame detection switch.
REFERENCES:
patent: 3026932 (1962-03-01), Algino
patent: 4325689 (1982-04-01), Burke
patent: 5009588 (1991-04-01), Williams, Jr.
patent: 6810602 (2004-11-01), Kim et al.
Kim Sang Doo
Yang Jae Suk
Clarke Sara
LG Electronics Inc.
McKenna Long & Aldridge LLP
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