Device for selectively authorizing passage through a door

Details Device for selectively authorizing passage through a door Device for selectively authorizing passage through a door

1980-05-23

1981-09-08

Pitts, Harold I.

Communications: electrical

Digital comparator systems

235382, H04Q 300, G06K 500

Patent

active

042887836

ABSTRACT:
The invention comprises an improved device for selectively authorizing passage through a door. A card reader accessible from each side of the door comprises a path along which the card is moved, terminating at its opposite ends in respective slots with respective card sensors, and a drive system for moving a card in either direction along the path. The device is microprocessor-controlled and is responsive to insertion of a card in a first slot by moving the card to a position beyond a read head. If the signal on the card authorizes access the door is opened and the card is moved to the second slot. If not, the card is returned to the first slot.

REFERENCES:
patent: 4035614 (1977-07-01), Frattarola

Affiliated with

Also associated with

Rating

Device for selectively authorizing passage through a door does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for selectively authorizing passage through a door, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for selectively authorizing passage through a door will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1195045