ALEXANDRIA, Va., March 26 -- United States Patent no. 12,260,740, issued on March 25, was assigned to Honeywell International Inc. (Charlotte, N.C.).
"Self-testing 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-testing fire sensing device are described herein. One device includes an adjustable particle generator and a variable airflow generator configured to generate an aerosol density level sufficient to trigger a fire response without saturating an optical scatter chamber and the optical scatte...