Patent ID: 7733235
Filing Date: 2010-06-08
Classification: G08B

Abstract:
1. In a RF wireless alarm system having a plurality of detectors for detecting smoke or fire, wherein, in operation, each detector detects the presence of smoke or fire and provides an alert in response thereto from an integral alarm, transmits a wireless alarm signal in response to detecting smoke or fire, receives alarm signals transmitted by other detectors and provides the alert from the integral alarm in response thereto, and transmits alarm signals in response to receipt of alarm signals from another detector, a method comprising: discontinuing receipt of any alarm signal from any detector for a lockout period, after a first detector has received a transmitted alarm signal; transmitting alarm signals from the first detector for a period of time after the first detector received a transmitted alarm signal; discontinuing transmission of alarm signals from the first detector, and again receiving and transmitting the alarm signal from the first detector if the alarm signal is received from a second detector after the lockout period has expired; and during the lockout period, any detector that initiated the alarm signal is able to discontinue transmission of its alarm signal if the smoke or fire condition causing the transmission of the alarm signal from the detector has abated, without responding to alarm signals from the first detector that would otherwise cause alarm signal transmission from the initiating detector when no detector senses a smoke or fire condition.