초록 ▼

A device (10) for monitoring selected operating conditions of combustion within a solid fossil fuel burning furnace having a discharge flue includes a circuit (12) for monitoring the instantaneous temperature in the flue and providing a signal proportional thereto, and a visual status indicator (35)

A device (10) for monitoring selected operating conditions of combustion within a solid fossil fuel burning furnace having a discharge flue includes a circuit (12) for monitoring the instantaneous temperature in the flue and providing a signal proportional thereto, and a visual status indicator (35) having a plurality of light emitting diodes (40-44). The number of light emitting diodes (40-44) emitting illumination at a given time is indicative of the selected operating conditions of combustion within the furnace.

대표청구항 ▼

A device for monitoring a solid fossil fuel burning furnace having a discharge flue, comprising: means for monitoring and providing a signal proportional to the temperature in the discharge flue; said means for monitoring including transducer means monitoring the temperature in the discharge flue an

A device for monitoring a solid fossil fuel burning furnace having a discharge flue, comprising: means for monitoring and providing a signal proportional to the temperature in the discharge flue; said means for monitoring including transducer means monitoring the temperature in the discharge flue and having a resistance proportional thereto; said means for monitoring also including circuit means providing a signal whose voltage is proportional to said resistance and detecting whether said voltage at least equals a preselected magnitude; said circuit means including adjustable base resistor means for selecting said predetermined magnitude, a first transistor detecting whether said voltage signal at least equals said preselected magnitude and thereupon providing an output signal proportional to said resistance, and a second transistor receiving and amplifying the output signal from said first transistor and providing a signal proportional to the temperature in the discharge flue; and, a plurality of light means for receiving said signal from said second transistor to provide a visual indication of selected operating conditions of combustion within the furnace, the number of said plurality of light means emitting illumination at a given time being indicative of the selected operating conditions of combustion within the furnace at that time.