Car security system and method

Details Car security system and method Car security system and method

1988-12-05

1990-05-08

Orsino, Joseph A.

Communications: electrical

Land vehicle alarms or indicators

Of burglary or unauthorized use

340539, B60R 2500

Patent

active

049242067

ABSTRACT:
A security and alarm system for vehicles includes a portable receiving unit with a remote alarm therein and a transmitter unit physically placed with a vehicle. The transmitter unit broadcasts a continuous radio frequency signal received by the receiver unit. The transmitter unit includes a cadmium sulfide photocell sensor responsive to access into the vehicle which will turn the transmitter off and activate a local alarm. The receiver unit constantly monitors the transmitter signal and will activate an alarm if the transmitted signal is not present for any reason, such as the vehicle being towed beyond the broadcast range.

REFERENCES:
patent: 4125826 (1978-11-01), Rasmussen et al.
patent: 4593273 (1986-06-01), Narcisse
patent: 4706689 (1987-11-01), Man
patent: 4814751 (1989-03-01), Hawkins et al.

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