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1. (WO2017152163) SMOKE DETECTORS WITH LIGHT SHIELDS AND ALARM SYSTEMS INCLUDING SUCH

Pub. No.:    WO/2017/152163    International Application No.:    PCT/US2017/020871
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Tue Mar 07 00:59:59 CET 2017
IPC: G08B 17/11
Applicants: XENEX DISINFECTION SERVICES, LLC.
Inventors: STIBICH, Mark A.
SIMMONS, Sarah E.
GUERRERO, Edward C.
FROUTAN, Paul P.
WHITELONIS, Nicholas
TABER, Joseph
Title: SMOKE DETECTORS WITH LIGHT SHIELDS AND ALARM SYSTEMS INCLUDING SUCH
Abstract:
Smoke detectors and smoke alarms are provided which have one or more light shields configured to block or minimize the transmission of ambient light to their light receivers. Light shield configurations for facilitating such functionality are provided as well. The shield/s include a material which attenuates a majority amount of light within a particular range of light that a light source of the smoke detector may be configured to only emit and/or the range of light the light receiver may configured to only convert to photocurrent. In some cases, the shield/s surrounds the light source and/or the light receiver arranged external to an interior chamber of the smoke detector. In some cases, the shield/s may at least partially span a connection side of an external housing of the smoke detector. Alternatively, the shield may be arranged in a space between the interior chamber and the connection side of the housing.