Combustion – Timer – programmer – retarder or condition responsive control – Shutdown by sensed absence of flame in proving period
Patent
1980-03-28
1982-04-20
Yeung, James C.
Combustion
Timer, programmer, retarder or condition responsive control
Shutdown by sensed absence of flame in proving period
431 27, 431 74, H01M 240
Patent
active
043256899
ABSTRACT:
A fuel ignition system for a heating apparatus includes a burner connected to a fuel supply, a valve for regulating the flow of fuel to the burner, an electrode assembly for producing a spark to ignite the fuel at the burner, an ignition system control module having input and output terminals for controlling the operation of the valve and the electrode assembly in response to a temperature-actuated device, the system control module producing output signals to open the valve and activate the electrode assembly for a predetermined time period to ignite the burner and locking in a non-operable mode to close the valve and deactivate the electrode assembly if the burner fails to ignite within the predetermined time period, and an automatic reset control for activating the system control module after a time-delay period. The automatic reset control includes a timer for determining the time-delay period having an input terminal and an output terminal and a function control including two triggerable bidirectional switches for activating the system control module and for activating and deactivating the timer. A first bidirectional switch is triggered by an output signal produced by the system control module to activate the timer when the valve is closed and to deactivate the timer when the valve is open. A second bidirectional switch is triggered by an output signal produced by the timer to activate the system control module after the time-delay period.
REFERENCES:
patent: 3446565 (1969-05-01), Hantack
patent: 3529910 (1970-09-01), Potts et al.
patent: 3582249 (1971-06-01), Hodgson
Teschendorf Harold A.
Yeung James C.
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