Abstract

A backup system for powering a fan that engages in the event of primary power loss. The system includes a backup motor run by an alternate power source and controlled by a backup circuit. When primary power is lost, a solenoid is de-energized, depressing a microswitch and completing the backup circuit to the alternate power source. The backup motor rotates into contact with the fan to ensure uninterrupted airflow. This backup system is especially suited for powering an air distribution fan that ensures sufficient oxygen reaches a coal fire burning within a coal stove, thus maintaining the coal fire until primary power is restored. This backup system is readily adapted to typical coal-burning stoves in addition to other devices.