Portable alarm system with sealed enclosure
First Claim
1. A portable alarm system comprising a compact portable sealed housing, an electronic alarm control circuit secured inside said housing, a power supply transformer in said housing connected between said control circuit and an AC terminal connector secured to said housing, a telephone jack secured to said housing and to a dialer circuit of said control circuit and to a telephone line jack, an auxiliary DC supply in said housing with an automatic switching device connected thereto to supply said control circuit upon detecting a predetermined supply condition, a digital key pad secured to said housing and having a plurality of switches actuable exteriorly of said housing for programming said control circuit which is contained within said sealed housing and unaccessible from the outside of said housing, and for actuating or deactuating said control circuit, a receiver circuit in said housing and connected to said control circuit, one or more wireless infrared detectors for detecting moving objects and removably secured to said housing;
- said detectors having infrared transmitters, of different frequencies from one another, to transmit to said receiver circuits alarm signals;
said receiver having a first channel responsive to a first of said detectors and being connected to said control circuit through a delay circuit means so that said control circuit only switches to an alarm state to generate an alarm code on said telephone line after a predetermined time delay, the others of said detectors being directly connected to said control circuit, and a siren secured to said control circuit to generate an audible local alarm upon actuation of said control circuit to said alarm state.
0 Assignments
0 Petitions
Accused Products
Abstract
A portable alarm system includes a compact portable sealed housing having an electronic alarm control circuit therein. An electrical a.c. 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 by a lessor person and for actuating or deactuating the control circuit by a lessee 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.
26 Citations
10 Claims
-
1. A portable alarm system comprising a compact portable sealed housing, an electronic alarm control circuit secured inside said housing, a power supply transformer in said housing connected between said control circuit and an AC terminal connector secured to said housing, a telephone jack secured to said housing and to a dialer circuit of said control circuit and to a telephone line jack, an auxiliary DC supply in said housing with an automatic switching device connected thereto to supply said control circuit upon detecting a predetermined supply condition, a digital key pad secured to said housing and having a plurality of switches actuable exteriorly of said housing for programming said control circuit which is contained within said sealed housing and unaccessible from the outside of said housing, and for actuating or deactuating said control circuit, a receiver circuit in said housing and connected to said control circuit, one or more wireless infrared detectors for detecting moving objects and removably secured to said housing;
- said detectors having infrared transmitters, of different frequencies from one another, to transmit to said receiver circuits alarm signals;
said receiver having a first channel responsive to a first of said detectors and being connected to said control circuit through a delay circuit means so that said control circuit only switches to an alarm state to generate an alarm code on said telephone line after a predetermined time delay, the others of said detectors being directly connected to said control circuit, and a siren secured to said control circuit to generate an audible local alarm upon actuation of said control circuit to said alarm state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- said detectors having infrared transmitters, of different frequencies from one another, to transmit to said receiver circuits alarm signals;
Specification