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US 4,544,920 AGranted
Intrusion detector and method
OwnerJerry J. Hamlininventor
Life of this patent
Estimating the term…
Abstract
Apparatus and method are provided for protecting an unoccupied building. The apparatus includes a noise detector for detecting noises generated by attempts to enter the building. Any noise detected is converted to an electronic signal and conveyed to an activator. The activator turns on a tape player which plays a tape recording of noise such as a barking dog. The noise is played through speakers within the building to give the impression the building is occupied or guarded by a watchdog.
Claims4
A building intrusion projection system which comprises:
- a plurality of means for detecting noise of attempted entry, said means for detecting including a plurality of audio microphones located proximate a plurality of possible building entry sites;
- recorded response means including an audio tape player having a continuous play audio tape with a recording of sounds of an excited dog;
- speakers located within said building for broadcasting said recorded response means;
- means responsive to said means for detecting for activating said recorded response means through at lease one speaker having a pre-established relationship with said means for detection activating said recorded response means, said responsive means including a controller coupled to said audio microphones through building wiring.
1 more element
A method for protecting an unoccupied building which comprises the steps of:
- placing a plurality of noise detectors within said building to detect noise of attempted entry;
- providing a tape player within said building;
- providing said tape player with a continuous play tape recording of a sounds of an excited dog;
- placing a plurality of speakers within said building for broadcasting said recording played on said tape player;
- providing tape player activating means for turning on said tape player in response to noise detected by said noise detector;
- and
- activating at least one of said speakers, said at least on speaker determined by an identified noise detector detecting said noise.
4 more elements
Dependencies are inferred from the claim text.