Portable alarm system with sealed enclosure

Details Portable alarm system with sealed enclosure Portable alarm system with sealed enclosure

G - Physics

08

B

379/6, 340/124.4

G08B 13/18 (2006.01) G08B 29/04 (2006.01)

Patent

CA 2007777

PORTABLE ALARM SYSTEM WITH SEALED ENCLOSURE Abstract of the Disclosure A portable alarm system comprising a compact portable sealed housing having an electronic alarm control circuit therein. An electrical AC cord supplies power to the control circuit and plugs into the housing. A telephone jack connects a telephone circuit to a dialer circuit within the control circuit. A digital key pad is secured to the housing and has a plurality of switches actuable exteriorly of the housing whereby to program the control circuit and for actuating or deactuating the control circuit by a user person. A receiver circuit is also provided in the housing and is connected to the control circuit. One or more wireless infrared detectors are detachably secured to the housing and positioned to detect moving objects within an environment to be protected. The detectors have infrared transmitters, of different frequencies, and transmit alarm signals to the receiver. The receiver has a first channel which is responsive to a first detector and is connected to the control circuit through a delay circuit so that the control circuit only switches to an alarm state to generate an alarm code on the telephone line after a predetermined time delay. The second channel of the receiver has no delay circuit. A siren is connected to the control circuit and secured to the housing to generate an audible local alarm upon activation of the control circuit to the alarm state.

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