Communications: electrical – Land vehicle alarms or indicators – Of burglary or unauthorized use
Patent
1988-02-24
1990-05-29
Crosland, Donnie L.
Communications: electrical
Land vehicle alarms or indicators
Of burglary or unauthorized use
340435, 340436, 340541, 340545, 307 91, 367 93, 180167, B60R 2510, B60Q 100
Patent
active
049299255
ABSTRACT:
An alarm system monitors a region, and includes a transducer supported to aim toward a boundary of the region. The transducer transmits sonic waves and receives echoes. The system generates an initial value corresponding to the distance between the transducer and a boundary of the region at one time, and activates the transducer at a later time to generate a current value corresponding to the distance between the transducer and a location from which the echoes originate. A control compares the current value to the initial value and activates an alarm when the current value differs significantly from the initial value. In one embodiment of the invention, the transducer aims toward a window of a vehicle and thereby detects either opening of the window or an associated door, breakage of the window, or intrusion into the vehicle between the transducer and the window. Transducers mounted on the underside of a trunk lid and a hood detect lifting the trunk lid or hood, respectively. The hood transducer also detects elevation of the vehicle.
REFERENCES:
patent: 3891861 (1975-06-01), Picard et al.
patent: 3909722 (1975-09-01), Bennet, Jr.
patent: 3973250 (1976-08-01), Uffelman
patent: 4001805 (1977-01-01), Golbe
patent: 4054867 (1977-10-01), Owens
patent: 4064507 (1977-12-01), Schmitz
patent: 4072936 (1978-02-01), Spirig
patent: 4092636 (1978-05-01), Shepherd et al.
patent: 4134109 (1979-01-01), McCormick et al.
patent: 4166273 (1979-08-01), Riley, Jr. et al.
patent: 4170769 (1979-10-01), Morris et al.
patent: 4191947 (1980-05-01), Bouchard et al.
patent: 4196423 (1980-04-01), Carver et al.
patent: 4207559 (1980-06-01), Meyer
patent: 4209776 (1980-06-01), Frederick
patent: 4225859 (1980-09-01), Zetting et al.
patent: 4242743 (1980-12-01), Salem
patent: 4263584 (1981-04-01), Sprig
patent: 4290058 (1981-09-01), Bystricky
patent: 4306228 (1981-12-01), Meyer
patent: 4414652 (1983-11-01), Christ
patent: 4468763 (1984-08-01), Braunling et al.
patent: 4470040 (1984-09-01), Kaminishi
patent: 4580125 (1986-04-01), Gotanda
patent: 4586031 (1986-04-01), Grinneiser
patent: 4633234 (1986-12-01), Gagnon
patent: 4639902 (1987-01-01), Leverance et al.
patent: 4668941 (1987-05-01), Davenport et al.
patent: 4684929 (1987-04-01), Edwards et al.
Bodine David B.
Farkas Joseph R.
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