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Detector and message annunciator device

  • US 4,912,457 A
  • Filed: 12/21/1988
  • Issued: 03/27/1990
  • Est. Priority Date: 12/21/1988
  • Status: Expired due to Fees
First Claim
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1. An integral and manually transportable apparatus for detecting the presence of persons within a predetermined distance and generating a predetermined audio message upon said detection, said apparatus comprising:

  • (a) sensor means for generating a signal indicating the presence of at least one person within a dynamically variable predetermined distance, wherein said predetermined distance may be dynamically varied by an operator;

    (b) logic circuit means coupled to said sensor means for generating at least one control signal for starting and stopping the playback of a prerecorded message; and

    (c) playback means for storing said prerecorded message and playing back said message upon receipt of said at least one control signal.

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