Home security system

Details Home security system Home security system

1981-01-21

1984-05-01

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular coupling link

340521, 340531, 340533, 340541, 367197, G08B 108, H04Q 130

Patent

active

044464541

ABSTRACT:
A security system for alerting an intrusion disturbance at an entry point to a residence, or alerting as to other emergency conditions, such as fire is disclosed. In the system, a primary monitoring unit having intrusion detection sensors for placement at entry points to a residence produces an audible acoustic alarm signal upon the occurrence of an intrusion disturbance. The acoustic signal is detected by a secondary monitoring unit which in response transmits an electronic signal through the wiring in the residence. A central monitoring unit receives the transmitted electronic signal and activates an alerting alarm and automatic telephone dialer. The system may further include a portable alarm switch for transmitting a coded radio frequency signal to the central monitoring unit to provide remote activation of an alerting device.

REFERENCES:
patent: 2905762 (1959-09-01), Rettie et al.
patent: 3925763 (1975-12-01), Wadhwani et al.
patent: 4092643 (1978-05-01), Stolarczyk
patent: 4187497 (1980-02-01), Howell et al.

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