Intrusion alarm and detection system

Details Intrusion alarm and detection system Intrusion alarm and detection system

1997-01-16

1998-09-15

Hofsass, Jeffery

Communications: electrical

Condition responsive indicating system

Specific condition

341176, 340426, G08B 1300

Patent

active

058085475

ABSTRACT:
An intrusion detection system used to surveil a predetermined space includes a monitor disposed within the space and a remote controller. The monitor comprises an intrusion detector for sensing an intruder in the space and a memory circuit having an armed and a disarmed state recording any sensed intrusion. The remote controller includes an RF transmitter activated by a button switch the pulsed closure of which either arms or tests or disarms the monitor. When arming the monitor, a first audible or visual output is produced by the monitor in response to the RF pulse which switches it from the disarmed to the armed state. In the armed state, the monitor produces a second audible or visual output in response to the RF pulse which is used to test the state of the monitor. The second response is easily distinguished from the first response by a user. If an intrusion occurs, the monitor produces an alarm signal. While the monitor is sounding the alarm signal, a pulsed closure of the button switch disarms the monitor. Should the monitor detect an intrusion and/or be disabled by the intruder, the lack of the monitor output in response to the RF pulse transmitted by the remote controller warns the user, before entering his or her premises, there exists the possibility of confronting an intruder.

REFERENCES:
patent: 5621385 (1997-04-01), Carney

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