US 12,215,860 B2
Flame detection and ignition device
Dominique Grillotti, Guénange (FR); Gilles Theis, Dudelange (LU); and Clement Bresillion, Metz (FR)
Assigned to JOHN ZINK COMPANY, LLC, Tulsa, OK (US)
Appl. No. 17/439,423
Filed by John Zink Company, LLC, Tulsa, OK (US)
PCT Filed Mar. 26, 2020, PCT No. PCT/IB2020/052877
§ 371(c)(1), (2) Date Sep. 15, 2021,
PCT Pub. No. WO2020/194238, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 1904194 (GB), filed on Mar. 26, 2019.
Prior Publication US 2022/0154929 A1, May 19, 2022
Int. Cl. F23D 14/72 (2006.01); F23Q 3/00 (2006.01); H01T 13/20 (2006.01); H01T 21/02 (2006.01)
CPC F23D 14/725 (2013.01) [F23Q 3/004 (2013.01); H01T 13/20 (2013.01); H01T 21/02 (2013.01)] 21 Claims
OG exemplary drawing
 
1. 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.