G - Physics – 08 – B
Patent
G - Physics
08
B
340/88
G08B 19/00 (2006.01) G08B 25/00 (2006.01) G08B 25/10 (2006.01) G08B 29/00 (2006.01)
Patent
CA 1180413
ABSTRACT OF THE DISCLOSURE Improvements in security alarm systems are disclosed. A security alarm system may be of the type having a plurality of sensors for one or more of fire, smoke, intrusion, appli- ance operation and the like. A central monitor is provided for monitoring and perceptibly indicating the status of each of the sensors. To provide for communication between the sensors and the central monitoring system, transmitters are located on the sensors and a receiver is provided on the central monitor. When one of the sensors establishes an alarm condition, its transmitter is actuated to transmit in- formation indicating the type of alarm. The receiver is adapted to recognize the code of its transmitters and indicate through the central monitor the type of alarm. An improvement comprises electronic means for loading information data into an electronic memory of each of the transmitters and into the electronic memory associated with the receiver. Each trans- mitter may be electrically coupled to the data loading device and is separable from the loading device after completion of data entry, thereby precluding altering of the information stored in the electronic memory of the respective transmitter. To avoid replacement of existing sensors, a transmitter is provided which is adapted for insertion between the electrical coupling to a power supply for the alarm sensor and the power supply leads of the alarm sensor. The transmitter has a de- vice for sensing excessive power drawn by the alarm sensor when it goes into an alarm state. The transmitter is then activated to transmit the coded information of its memory to identify itself to the central monitor regarding the alarm condition information.
409419
Isotec Industries Limited
Sim & Mcburney
LandOfFree
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