ALEXANDRIA, Va., July 3 -- United States Patent no. 12,347,294, issued on July 1, was assigned to Honeywell International Inc. (Charlotte, N.C.).
"Self-calibrating fire sensing device" was invented by Christopher Dearden (Melton Mowbray, Great Britain), Michael Barson (Nuneaton, Great Britain) and Benjamin Wolf (Leicester, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "Devices, methods, and systems for a self-calibrating fire sensing device are described herein. One device includes an adjustable particle generator and a variable airflow generator configured to generate aerosol having a particular particle size and optical scatter properties at a controllable density level, a first transmitter l...