Appeal 2007-3496
Application 10/344,472
device that is an electrically ignited auxiliary burner (de Haan, e.g., col. 1, ll.
5-11, col. 2, ll. 16-19, col. 2, l. 68, to col. 3, l. 5, col. 3, ll. 25-35 and
46-50, col. 4, ll. 57-60, and Fig. 1). The ignition device is a separate burner
within burner 1, wherein conduits and other elements 14,15,16,17,18,19
supply gas at varying velocity to the annular space within tubular element 6
in which ignition electrode 8 is retracted from inboard end 7 of annular front
wall 4 (id., e.g., col. 2, ll. 20-46, col. 3, ll. 51-60, col. 4, ll. 1-12, and Figs.
1 and 3). In this arrangement, ignition electrode 8 can be used to detect
flame generation in the annular space via ionization (id., e.g., col. 3, ll. 6-11,
col. 4, ll. 50-54, and Figs. 1 and 3).
The other burner of burner 1 is facing forward on annular front wall 4,
wherein conduits 20,21 supply gas to nozzles 22,23 (id., e.g., col. 2,
ll. 24-29, col. 3, ll. 22-33, col. 4, ll. 13-24, and Figs. 1-3). In this
arrangement, “the ultimately flame generated outside the burner [1 in
chamber 5] may be detected . . . preferably based on detection of infrared
radiation which is transmitted via optical fiber means,” such as infrared
detector 30 mounted on annular front wall 4 and coupled to optical fiber 13
located in tubular element 6, wherein optical fiber 13 is connected to
“receiver and transducer (not shown) for measuring the intensity of light
emitted by the flame generated during operation of the burner” (id., e.g., col.
3, ll. 12-21 and 62-68, col. 4, ll. 54-56, and Figs. 1-3).
We find de Haan discloses in operation, ignition electrode 8 ignites a
low velocity gas mixture in the annular space to generate a stable pilot flame
which ignites a higher velocity gas mixture to form a small flame in the
same space, which latter flame ignites the gases issued by nozzles 22,23 on
5
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Last modified: September 9, 2013