Smoke detector with time out capability

摘要

A smoke detector which may be hard wired or battery operated and having circuitry for providing an audio/visual alarm upon detecting smoke. A radio frequency, infrared or other form of detector detects a signal from a remote RF, infrared or other compatible transmitter. The activation of the transmitter operating button transmits an appropriate signal to the compatible receiver which initiates a timer for disabling the audio/visual alarm signal generated by the smoke detector for a predetermined time interval which may be adjustable, if desired. Recognition that the circuitry has detected the transmitted signal is by way of flashing an LED or other illuminating device thereby providing an indication that the time-out request signal from the transmitter has been received and acknowledged. The smoke detector automatically turns back on when the time-out period has elapsed. A coding scheme is provided to prevent the smoke detector from being turned on by another remote transmitter or by IR possibly generated by a fire occurring within the visual viewing range of the IR receiver.