Flame-monitoring device
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United States of America Patent
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May 16, 2006
Grant Date -
Sep 16, 2004
app pub date -
May 22, 2002
filing date -
May 25, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a flame-monitoring device in which an a.c. input voltage (U1) is limited to a voltage limit (U2) by means of a voltage limiter (4). Said voltage limit (U2) is applied to a flame sensing device (7) which operates by means of the rectifying effect of a flame, and through which a current (i) flows, especially when a flame (6) is present. An asymmetric voltage limit (U2) can be defined by said voltage limiter (4), said limit being then applied to the sensing device (7).
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