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US 2002/0171432 A1Published application
Silicon oxide contamination shedding sensor
AssigneeGas Research Institute
InventorsStephan E. Schmidt, Kristin Powers Goppel, Eric J. Carlson
Life of this patent
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Abstract
In a flame ionization sensor type gas combustion control apparatus, the sensor tip, or probe, exposed to the flame is constructed and arranged according to materials and shapes which promote mechanical deformation of the sensor due to thermal expansion and contraction. The mechanical deformation will cause cracks to open in the contaminant layers surrounding the probe, enabling the sensor to perform as intended even though insulative contaminant build up is present.
Claims17
A probe for a flame ionization sensor comprising:
- the probe having a shape conducive to mechanical deformation under normal use sufficient to cause cracking of insulative contaminant coverings on the probe.
A probe for a flame ionization sensor comprising:
- a material of sufficient coefficient of thermal expansion and a shape conducive to mechanical deformation sufficient to cause thermal deformation of the probe sufficient to cause cracking of insulative contaminant coverings on the probe.
Dependencies are inferred from the claim text.