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Adaptive sound actuated illumination device for battery operation

  • US 6,278,366 B1
  • Filed: 12/22/1999
  • Issued: 08/21/2001
  • Est. Priority Date: 12/22/1999
  • Status: Expired due to Fees
First Claim
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1. A new and improved illumination system for door locks and keyholes to effect the illumination of a door lock assembly upon the making of a noise by a user comprising, in combination;

  • an enclosure having an adaptive non-marring region with an aperture and flange positioned between the door and the exterior portion of the deadbolt lock, within this enclosure of durable material having an interior chamber consisting of electronic components located within the chamber, the electrical components including a light emitting diode positioned within the housing adjacent to the exterior portion of the deadbolt lock or door knob lock, a sound receiving microphone adapted to be energized in response to a noise by the user to energize the light emitting diode, an optical sensor adapted to determine the existence of ambient light to thereby preclude the illumination of the light emitting diode when sufficient light is detected, an electronic circuit to receive the inputs of the microphone and optical sensor and to provide an output to energize the light emitting diode, a time sensing electrical component including a resistor, capacitor and an integrated circuit to time out the activation of the light emitting diode after a predetermined period of time between, but not limited to, 20 and 60 seconds, and a battery to power the electrical components.

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