| 摘要 |
A system for locating lost keys or other items includes a compact, pocket-sized unit that includes a key chain. The unit includes a sound generator that generates a sound of sufficient volume to facilitate locating the device from a distance. The sound generator is coupled to a beeper circuit to allow the operator to actuate the sound generator by placing a telephone call to a beeper or other service. The unit also acts as a conventional beeper for allowing the user to receive messages. Herein, a beeper is defined to include pagers and any other portable device that can be activated by a user placing a telephone call. Using a voice menu, the caller can control the volume of the audible signal generated by the sound generator and/or the duration of the sound-generation event. The operator can also activate a flashing light of the compact unit. Various optional features may be included within the unit, including a miniature flashlight (useful for locating a key hole), a "panic" button that activates the sound generator at is highest volume setting, and a transmitter for opening door locks and/or opening a garage door.
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