Abstract A burner for chemical analysis such as flame spectroscopy, is provided with a burner plate having a flame aperture comprising a long slot extending through the upper and lower surfaces of the burner plate. The slot has a longitudinal profile taken at right angles to the length of the slot which is at least partly arcuate about an axis parallel to the length of the slot and tapers inwardly from the fuel inlet region adjacent the lower surface of the burner plate. In one embodiment the lower edge of the slot is defined by an arc of a circle at least 3 mm in radius. The specified profile minimizes turbulence in the slot region adjacent the lower surface of the burner plate and hence reduces the deposition of sample material on the burner plate.
A burner for chemical apparatus comprising a burner plate having therein a flame aperture formed by a passage in the form of a slot, said passage extending through the upper and lower surfaces of said burner plate, the walls of said passage having a profile taken in a section located at right angles to the longer dimension of the slot, which tapers inwardly from a fuel inlet region adjacent the lower surface of said burner plate, said profile being at least partly arcuate about an axis parallel to the longer dimension of said slot.
Claim 2
Dependent Claim
94 words
A burner for chemical apparatus comprising a burner plate having therein a flame aperture formed by a passage in the form of a slot, said passage extending through the upper and lower surfaces of said burner plate, the walls of said passage having a profile taken in a section located at right angles to the longer dimension of the slot, which tapers inwardly from a fuel inlet region adjacent the lower surface of said burner plate, said profile being at least partly arcuate about an axis parallel to the longer dimension of said slot.
Claim 3
Dependent Claim
39 words
A burner as claimed in claim 1, in which the edges of the slot in the lower surface of the burner plate have a said profile defined by the arc of a circle of radius 3 mm or greater.