Communications: electrical – Continuously variable indicating – With meter reading
Patent
1987-12-21
1989-09-19
Brigance, Gerald L.
Communications: electrical
Continuously variable indicating
With meter reading
3408253, 70276, 70278, E05B 4700, H04Q 300
Patent
active
048689149
ABSTRACT:
A method for clearing unlocking key codes in an electronic locking device in which the unlocking circuit is arranged to be actuated when the code of a magnetic card read by the card reader agrees with an unlocking key code set in the memory, the method comprising using a first clearing card which will function only when the door associated with the locking device is open and a second clearing card which will function only when the door is closed, setting the codes of the first and second clearing cards in specified separate addresses in the memory in the code setting mode for setting the codes of the clearing cards in the processing unit (CPU) of the electronic locking device, determining whether the door is open or closed in the normal operation mode of the CPU, and clearing the unlocking key codes only when the code read by the card reader is identical to the code of the first clearing card set in the above-mentioned manner and the door is open, or when the code read by the card reader is identical to the code of the second clearing card set in the above-mentioned manner and the door is closed.
REFERENCES:
patent: 3821704 (1974-06-01), Sabsay
patent: 3906447 (1975-09-01), Crafton
patent: 4207555 (1980-10-01), Trombly
patent: 4411144 (1983-10-01), Aydin
patent: 4511946 (1985-04-01), McGahan
patent: 4519228 (1985-05-01), Sornes
Brigance Gerald L.
Unisafe Limited
LandOfFree
Method for clearing unlocking key codes in an electronic locking does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for clearing unlocking key codes in an electronic locking, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for clearing unlocking key codes in an electronic locking will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-375375