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US 2003/0197609 A1Published application
Detachable alarm
OwnerHung-Chang Liuinventor
Life of this patent
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Abstract
A detachable alarm includes an enclosure, a suction cup connected to the enclosure, a circuit board connected to the suction cup and a spring. The circuit board has a vibration sensor, and the spring presses against a surface on which the alarm is mounted. The alarm is easily detachably mounted on doors or windows by the suction cup and the enclosure. The circuit board outputs sound when the vibration sensor detect abnormal vibrations on the surface. Therefore the alarm not only conveniently stick to any place to provide security but can output sound to frighten an intruder.
Claims6
A detachable alarm, comprising:
- an enclosure having a top and an opening defined in the top;
- a suction cup having an upper face connected to an inside of the enclosure and an inner face to adapt to attach to a flat surface;
- a circuit board mounted on the upper face of the suction cup wherein a vibration sensor on the circuit board connects to a spring to detect vibration of the flat surface through the spring.
Dependencies are inferred from the claim text.