Source: http://www.google.co.uk/patents/US8149112
Timestamp: 2013-12-05 21:50:17
Document Index: 312633102

Matched Legal Cases: ['art, 18', 'art, 19', 'art, 20', 'Application No. 2', 'Application No. 8', 'Application No. 9']

Patent US8149112 - Multi-hazard alarm system using selectable power-level transmission and ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Advanced Patent Search | Sign inAdvanced Patent SearchPatentsA personal alarm system includes a monitoring base station and one or more remote sensing units in two-way radio communication. An electronic handshake between the base station and each remote unit is used to assure system reliability. The remote units transmit at selectable power levels. In the absence...http://www.google.co.uk/patents/US8149112?utm_source=gb-gplus-sharePatent US8149112 - Multi-hazard alarm system using selectable power-level transmission and localizationPublication numberUS8149112 B2Publication typeGrantApplication numberUS 11/493,935Publication date3 Apr 2012Filing date25 Jul 2006Priority date27 Oct 1994Also published asUS20040113794, US20070030156, US20080311882, US20130237182Publication number11493935, 493935, US 8149112 B2, US 8149112B2, US-B2-8149112, US8149112 B2, US8149112B2InventorsWilliam B. Baringer, Dan SchlagerOriginal AssigneeMosaid Technologies IncorporatedPatent Citations (115), Non-Patent Citations (118), Classifications (52), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetMulti-hazard alarm system using selectable power-level transmission and localizationUS 8149112 B2Abstract A personal alarm system includes a monitoring base station and one or more remote sensing units in two-way radio communication. An electronic handshake between the base station and each remote unit is used to assure system reliability. The remote units transmit at selectable power levels. In the absence of an emergency, a remote unit transmits at a power-conserving low power level. Received field strength is measured to determine whether a remote unit has moved beyond a predetermined distance from the base station. If the distance is exceeded, the remote unit transmits at a higher power level. The remote unit includes sensors for common hazards including water emersion, smoke, excessive heat, excessive carbon monoxide concentration, and electrical shock. The base station periodically polls the remote units and displays the status of the environmental sensors. The system is useful in child monitoring, for use with invalids, and with employees involved in activities which expose them to environmental risk. Alternative embodiments include a panic button on the remote unit for summoning help, and an audible beacon on the remote unit which can be activated from the base station and useful for locating strayed children. In another embodiment, the remote unit includes a Global Positioning System receiver providing location information for display by the base station.
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