Computerized door locking and monitoring system using power-line carrier components
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 3, 1991
Grant Date -
N/A
app pub date -
Dec 14, 1989
filing date -
Dec 14, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of locking, unlocking and monitoring doors using a computer and a computer software program, electro-locking devices, power-line carrier components and existing AC wiring from the door sites to the computer is provided. The computer program changes the status of each door according to predetermined schedule and displays the locked/unlocked/ajar status of each door as well as the event change (Push bar/key/fire alarm). Exits are fitted with electro-door locks with sensor capabilities and are monitored from the computer via power line carrier components. At each exit site, a receiver receives commands from the computer and changes the locking status while a transmitter at the door site reports every changed status back to the computer. A microprocessor at each door site can control the doors and operate via battery back-up in a power failure or when communication from the computer program is interrupted. A transmitter at the fire alarm panel causes all doors to unlock if the fire alarm is activated.
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