| 摘要 |
A compact case houses a battery powered smoke detector, and an alarm clock is detachably mounted to the case. A mechanism is provided for releasably securing the case to the upper edge of a door, picture frame, or the like, so that the smoke detector is positioned close to the ceiling of a room where it more effectively detects fire. The detachable clock is removed and placed at a more convenient location apart from the smoke detector, for example, on a table in the room. A three-position switch is provided. In one position, the switch cuts off power to the smoke detector to prevent unwanted alarms. In another position, the switch causes an emergency light to turn on while the smoke detector is simultaneously deenergized. In the third position, the switch couples the light to the smoke detector circuit and engages this latter circuit such that the light automatically turns on when the smoke detector alarm sounds.
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