Silicon oxide contamination shedding sensor

US6414494B1 · kind B1 · utility

Inventors

• Stephan E. Schmidt · Essen, DE
• Kristin Powers Goppel · Shrewsbury, US
• Eric J. Carlson · Andover, US

Key dates

• Filing date: Apr 13, 2000
• Grant date: Jul 2, 2002
• Expiry date: Apr 13, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F23D2208/10
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

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.