Patent Number: 8,878,665

Title: Fire alarm power line carrier com-system

Abstract: A fire alarm system 4 for a structure, has a two-wire interconnected transceiver 4J that uses power line carrier technology to inject a radio signal onto two power conductors, 6B & 6W. The transceiver 4J includes a transmitter circuit 7 and a receiver circuit 9. The transmitter circuit 7 includes a trigger circuit 10, attachable to an output line of a local fire alarm 5. The trigger circuit 10, can monitor the output line (6 Yellow) for an alarm condition output signal, for the purpose of sensing an alarm condition. The transmitter circuit 7 responds to the alarm condition output signal by injecting the radio signal onto the two power conductors. The radio signal would activate a second fire alarm system 4B attached to power lines in the structure.

Inventors: Kalivas; Christopher George (Patchogue, NY), Apelman; Steven Perry (Centereach, NY)


International Classification: G08B 1/08 (20060101)

Expiration Date: 2019-11-04 0:00:00