Combustion – Timer – programmer – retarder or condition responsive control – Sensor of first burner controls second burner – e.g. – pilot...
Patent
1989-07-14
1990-11-20
Price, Carl D.
Combustion
Timer, programmer, retarder or condition responsive control
Sensor of first burner controls second burner, e.g., pilot...
431 60, 431 75, 431 18, F23Q 908
Patent
active
049715496
ABSTRACT:
A control unit for a gas furnace that has an electrically operable pilot gas valve and an electrically operable main gas valve and a method of making the control unit are provided, the control unit comprising an electrical circuit having a gas valve section that comprises a silicon controlled rectifier and a first capacitor and a second capacitor so electrically interconnected together that the capacitors are adapted to be charged on each half wave cycle of a certain polarity of an alternative current source that is imposed on the circuit and that second capacitor is adapted to discharge through a relay coil that controls the gas valve to energize that relay coil only when the silicon controlled rectifier conducts, the silicon controlled rectifier being adapted to conduct only when the first capacitor is discharged, another section of the electrical circuit being adapted to discharge the first capacitor only on each half wave cycle of the other polarity of the alternative current source.
REFERENCES:
patent: 3766441 (1973-10-01), Gray
patent: 4070143 (1978-01-01), Dietz
patent: 4269589 (1981-05-01), Matthews
patent: 4435150 (1984-03-01), Rippelmeyer
patent: 4626192 (1986-12-01), Geary
patent: 4865539 (1989-09-01), Geary
Price Carl D.
Robertshaw Controls Company
LandOfFree
Fuel control unit for a gas furnace and method of making the sam does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fuel control unit for a gas furnace and method of making the sam, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fuel control unit for a gas furnace and method of making the sam will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-452232