Patent ID: 8446274
Filing Date: 2013-05-21
Classification: G01N,G08B

Abstract:
1. A personal monitor system for monitoring a safety of a person that might be exposed to a gas or other hazards while at a worksite or while traveling to or from the worksite, the personal monitor system comprising: a central base system; a portable transceiver unit carried by the person and being movable thereby to a remote location relative to the central base system, the portable transceiver unit includes a logic circuit; a wireless communication link placing the portable transceiver unit in communication with the central base system; a gas sensor borne by the portable transceiver unit, operatively coupled to the logic circuit, and being responsive to the gas; a user interface borne by the portable transceiver unit, the user interface being operatively coupled to the logic circuit and being responsive to a plurality of manual manipulations by the person; a notification system borne by the portable transceiver unit and being operatively coupled to the logic circuit; an alarm emanating from the notification system if a concentration of the gas, as sensed by the gas sensor, exceeds a predetermined limit; an alarm message displayed by the central base system as a result of the concentration of gas (as sensed by the gas sensor) exceeding the predetermined limit; a plurality of prompt signals periodically emanating from the notification system, wherein the plurality of prompt signals includes a first prompt signal; a first check-in signal conveyed by the wireless communication link from the portable transceiver unit to the central base system in response to a first manual manipulation of the user interface, wherein the first manual manipulation is one of the plurality of manual manipulations; and a warning message displayed by the central base system if the central base system fails to receive a subsequent check-in signal within a certain time span following at least one of the first check-in signal and the first prompt signal.