Patent ID: 11860092
Assignee: KIDDE TECHNOLOGIES, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A method for optically detecting particulates, the method comprising:
providing a protective cover disposed on a chamberless detector;
permitting, via a plurality of apertures through the protective cover, fluid communication and light transmission between an outside region and an inside region formed by the protective cover and the chamberless detector wherein the plurality of apertures are configured in a geometrical pattern selected from the group consisting of: parallel latitudes and meridian longitudes;
emitting, via one or more optical emitters disposed on a chamberless detector, light directed away from the one or more optical emitters within one or more emitting cones;
detecting, via one or more optical sensors disposed on the chamberless detector, light directed within a receiving cone toward the one or more optical sensors within one or more receiving cones; and
wherein the one or more receiving cones intersects the one or more light emitting cones thereby forming two or more sensing volumes, at least one of the two or more sensing volumes located in the inside region, and at least one of the two or more sensing volumes located in the outside region; and
generating, via the one or more optical sensors, a signal in response to a sensing events caused by a particulate within at least one of the two or more sensing volumes.