Patent US4544920A successfully refreshed from Google Patents.
US4544920A
Expired / Lapsed
US
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Intrusion detector and method
Assignee: Individual
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Filing: 1982-10-27
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Granted: 1985-10-01
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Expires: 2002-10-27
Abstract
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.
Inventors
- 👤 Jerry J. Hamlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:20
CPC Classifications
G; G08; G08B; G08B15/00; G08B15/002
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
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.
Claim 2
Dependent Claim
116 words
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.
Claim 3
Dependent Claim
23 words
The system of claim 1 wherein said means responsive further comprises means for turning off said recorded response means after a predetermined time.
Claim 4
Dependent Claim
27 words
The system of claim 2 wherein said means responsive further comprises delay means for preventing said recorded response means being turned on again after being turned off.
Claim 5
Independent Claim
110 words
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.
Claim 6
Independent Claim
110 words
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.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-30 | 1989-04-01 | 1989-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-30 | 1993-04-01 | 1993-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-30 | 1997-04-01 | 1997-10-01 | $7700.00 | Window Closed / Lapsed |