Combustion – Timer – programmer – retarder or condition responsive control – By combustion or combustion zone sensor
Patent
1977-08-22
1979-04-24
Wayner, William E.
Combustion
Timer, programmer, retarder or condition responsive control
By combustion or combustion zone sensor
236 15E, 122448R, F23N 500
Patent
active
041509390
ABSTRACT:
A differential controller for a jackshaft or a positioning combustion system having an input shaft coupled to a fuel valve and an output shaft coupled to an air damper. The controller includes means for sensing a transmitted signal indicative of the level of oxygen in the products of combustion and in response thereto differentially adjusts the vernier position of the output shaft relative to the input shaft to provide optimum fuel use under all operating conditions. The controller includes means for precluding differential travel between the shafts at low fire (load) positions. As load demand increases the controller enables differential travel to occur with increasing demand, with the amount of differential travel permitted being a function of increasing load. The maximum range of differential travel is adjustably predetermined. The controller also includes means for determining if an alarm condition exists, whereupon an alarm signal is provided and the output shaft is returned to a preselected null position relative to the input shaft to provide for failsafe operation.
REFERENCES:
patent: 2784912 (1957-03-01), Scutt
patent: 2980334 (1961-04-01), Geniesse
patent: 3503553 (1970-03-01), Schomaker
patent: 3549089 (1970-12-01), Hamlett
patent: 3607117 (1971-09-01), Shaw
Power, pp. 23-25, R. K. Evans, 12/1967.
Reliance Instrument Manufacturing Corp.
Wayner William E.
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