Patent ID: 6323780
Filing Date: 2001-11-27
Classification: G08B

Abstract:
An environmental condition detection system having:a minimum of two environmental condition detectors, each said environmental condition detector comprising(a) at least one sensor for detecting the presence of a selected environmental condition,(b) an audible alarm having at least one user unalterable, prescribed audible tonal pattern active in response to sensing said environmental condition in accordance with a predetermined criterion;(c) voice circuitry for playing at least one user unalterable, pre-recorded voice message wherein the message verbally describes the type of detected environmental condition for the duration of detection thereof in accordance with said criterion such that said pre-recorded voice message is emitted during periods of silence in said prescribed audible tonal pattern alarm; and(d) a transmitter and a receiver for wireless direct communication with other detectors of the system wherein each transmitter transmits coded wireless signals and each said receiver responds to received, coded signals, each said detector emitting at least one user unalterable electronically pre-recorded voice message, the selection of which is defined by electronic decoding of the received wireless signal transmitted by a condition detector sensing said environmental condition;(e) selectable coding circuitry to define the installation location of the respective detector and wherein the voice circuitry plays a location specifying message;wherein said at least one sensor is selected from a group including a smoke sensor, a carbon monoxide gas sensor, a natural gas sensor, and a propane gas sensor.