Postpurge pilot burner sequencing means

Details Postpurge pilot burner sequencing means Postpurge pilot burner sequencing means

1976-02-05

1977-07-12

O'Dea, William F.

Combustion

Timer, programmer, retarder or condition responsive control

Control of purger, of scavenger or of combustion start-up...

431 31, F23N 500

Patent

active

040351351

ABSTRACT:
A fuel burner sequencing device is disclosed which utulizes cam operated switches in conjunction with relays to program the initiation and safe operation of a fuel burner. The sequencing device or means provides for a normal start up and ignition of a fuel burner, and then provides for a postpurge pilot operation for a normal shutdown of the burner. The postpurge pilot operation activates the pilot burner during the time the main burner is on thereby lighting the pilot burner before the main burner is turned off. The pilot burner is retained in a burning state for a short period after the main burner has been turned off to burn off any residual fuel before the sequencing device or means completes its sequence and is ready for the initiation of a new operating cycle.

REFERENCES:
patent: 2085195 (1937-06-01), Kerr
patent: 2818110 (1957-12-01), Rulseh
patent: 2903052 (1959-09-01), Aubert
patent: 3026867 (1962-03-01), Size
patent: 3082813 (1963-03-01), Hamelink
patent: 3449055 (1969-06-01), Blackett
patent: 3574495 (1971-04-01), Landis
patent: 3814569 (1974-06-01), Jacobsz

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