Multi-level flame curent sensing circuit

Details Multi-level flame curent sensing circuit Multi-level flame curent sensing circuit

1993-07-16

1995-08-08

Jones, Larry

Combustion

Timer, programmer, retarder or condition responsive control

With test circuit checking or analyzing flame sensing...

431 18, 431 74, 431 80, 431 26, 431 24, F23Q 2300

Patent

active

054393744

ABSTRACT:
A circuit for producing signals representative of at least two flame current levels is disclosed herein. The circuit includes two electrodes locatable in a flame, where a voltage potential is set up between the electrodes, and the current flow is measured therebetween (flame current). The circuit includes an amplifying portion for amplifying the flame current and applying a signal to a microprocessor. The microprocessor samples the signal and outputs a signal representative of the flame current level.

REFERENCES:
patent: 3423158 (1969-01-01), Forbes
patent: 3627458 (1971-12-01), Wade
patent: 4672324 (1987-06-01), van Kampen
patent: 4710125 (1987-12-01), Nakamura et al.
patent: 4871307 (1989-10-01), Harris et al.
patent: 4955806 (1990-09-01), Grunden et al.
patent: 5055825 (1991-10-01), Yang
patent: 5256057 (1993-10-01), Grow

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