US 12,437,623 B2
Dual band infra red optical fire detector
Scott K. Newlin, Willow Springs, NC (US); Donald G. Kramer, Wake Forest, NC (US); Judy Cherian, Morrisville, NC (US); and Benjamin Codispoti, Raleigh, NC (US)
Assigned to KIDDE TECHNOLOGIES, INC., Wilson, NC (US)
Filed by Kidde Technologies, Inc., Wilson, NC (US)
Filed on Jan. 23, 2023, as Appl. No. 18/157,924.
Prior Publication US 2024/0249607 A1, Jul. 25, 2024
Int. Cl. G08B 17/12 (2006.01); A62C 3/08 (2006.01)
CPC G08B 17/12 (2013.01) [A62C 3/08 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A flame detector for an aircraft, comprising:
a housing;
two sensors disposed in the housing to detect light signals indicative of a flame event, the two sensors including:
a first sensor configured to detect light signals at a first infrared wavelength range; and
a second sensor configured to detect light signals at a second wavelength range;
a controller to receive signals from the two sensors, and to determine the presence of the flame event only if the signals indicative of the flame event are received from both of the two sensors; and
a light source disposed in the housing to emit light signals for test of the flame detector, wherein the light source is a light emitting diode configured to emit light signals only detectable by one of the two sensors.