Patent ID: 6753786
Filing Date: 2004-06-22
Classification: G08B

Abstract:
A hazardous condition detector, comprising:a smoke chamber positioned to sense an atmospheric condition, the smoke chamber generating an output indicative of an amount of smoke sensed therein; a user-actuated switch; an alarm circuit; a microcontroller coupled to receive the output of the smoke chamber and the switch, and further operably coupled to the alarm circuit for controlling generation of an alarm therefrom, the microcontroller having an alarm threshold and a hush threshold stored therein, and being operable to place the detector in an alarm mode when the output from the smoke chamber drops below the alarm threshold, in a hush mode upon sensing actuation of the switch when in the alarm mode and when the output of the smoke chamber is above the hush threshold, and in a test mode upon sensing actuation of the switch when not in the alarm mode and not in the hush mode.