Flame detection and ignition device
AssigneeJohn Zink Company
InventorsDominique Grillotti, Gilles Theis, Clement Bresillion
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Abstract
There is disclosed an ionisation and/or ignition device comprising: an inner rod, an outer sleeve, and an electrical insulator. The inner rod comprises a semiconductor refractory material. The outer sleeve comprises a semiconductor refractory material. The electrical insulator is disposed between the inner rod and the outer sleeve. The inner rod material has a greater hardness than the outer sleeve material.
Claims21
A device configured for use as an ionisation detection device and/or as an ignition device, the device comprising:
- an inner rod comprising a first semiconductor refractory material having a first hardness;
- an outer sleeve comprising a second semiconductor refractory material having a second hardness;
- a solid electrical insulator, the electrical insulator being disposed between the inner rod and the outer sleeve;
- wherein the first hardness is greater than the second hardness.
A method of making an ionisation detection and/or ignition device comprising the steps of:
- providing an outer sleeve comprising a first semiconductor refractory material;
- providing, within the outer sleeve, an inner rod comprising a second semiconductor refractory material which is harder than the first semiconductor refractory material;
- providing a solid electrical insulator between the inner rod and the outer sleeve.
A device configured for use as an ionisation detection device and/or as an ignition device, the device comprising:
- an inner rod comprising re-crystallised silicon carbide having a first hardness;
- an outer sleeve comprising sintered silicon carbide having a second hardness;
- an electrical insulator, the electrical insulator being disposed between the inner rod and the outer sleeve;
- wherein the first hardness is greater than the second hardness.
Dependencies are inferred from the claim text.