Combustion – Timer – programmer – retarder or condition responsive control – Sensor of first burner controls second burner – e.g. – pilot...
Patent
1978-12-07
1980-12-30
Ward, Jr., Robert S.
Combustion
Timer, programmer, retarder or condition responsive control
Sensor of first burner controls second burner, e.g., pilot...
431 51, 431 71, 431 78, F23Q 914
Patent
active
042420792
ABSTRACT:
A fuel ignition control system including a control arrangement for operating pilot and main valves of the system the pilot valve being operated to permit a pilot flame to be established, and the main valve being operated by a pilot flame sensing circuit which includes a controlled switching device enabled in response to the charging of a capacitor to a given value to effect the operation of the main valve, the charging of the capacitor being controlled by a further controlled switching device which supplies AC current to the capacitor in the absence of a pilot flame, preventing the capacitor from charging to the given value, and which supplies DC current to the capacitor when a pilot flame is established, permitting the capacitor to charge to the given value. In an embodiment wherein the main valve is energized by a relay controlled by the flame sensing circuit, the control arrangement includes an interlock arrangement which prevents start up of the system under certain failure conditions, such as welded relay contacts. In another embodiment, the system includes an igniter circuit which has a flame responsive enabling circuit which permits the igniter circuit to be enabled and disabled independently of the flame sensing circuit.
REFERENCES:
patent: 3441356 (1969-04-01), Walbridge
patent: 3574496 (1971-04-01), Hewitt
patent: 3619097 (1971-11-01), Clay et al.
patent: 3938937 (1976-02-01), Matthews
patent: 3975136 (1976-08-01), Baysinger et al.
patent: 3986813 (1976-10-01), Hewitt
patent: 4035134 (1977-07-01), Matthews
patent: 4038019 (1977-07-01), Matthews
Johnson Controls Inc.
Ward, Jr. Robert S.
LandOfFree
Fuel ignition control system 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 ignition control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fuel ignition control system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-5382