Device for selectively authorizing passage through a door
AssigneesDominique Chauvat, Michel Charpentier, S.A. Emile Chauvat et Sofranq Reunis
InventorsDominique Chauvat, Michel Charpentier
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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.
Claims10
A device for selectively authorizing the bearer of a coded card to pass through a door in a wall, the device comprising:
- a card reader located in the vicinity of the door and accessible from the or each approach side thereof, said card reader being responsive to the insertion of a card by reading a digital signal recorded on the card and comprising a path along which the card is moved, extending longitudinally between opposite sides of the aforementioned wall and terminating at its opposite ends in respective slots with respective card sensors, a bidirectional drive system for moving a card in either of two opposite directions along said path and a read head centrally located on said card path to read the aforementioned signal from a longitudinal track centrally located on the card;
- means for opening or permitting opening of the door in response to an electrical command signal;
- a logic unit including a memory and connected to said card reader and said door opening means to compare the read digital signal with a plurality of digital signals stored in said memory and responsive to equality of said read signal with at least one of said stored signals by sending an electrical command signal to said door opening means, said logic unit being responsive to insertion of a card in the first of said slots by causing said drive system to operate in such a way as to move the card in a first direction from said slot to a position beyond said read head and selectively responsive to comparison of the signal read from the card with the aforementioned plurality of signals by causing said drive system to operate in such a way as to move the card in a second direction opposite to said first direction so as to return it to the first slot, or by sending an electrical command signal to said door opening means;
- and means responsive to closure of the door following the sending of said electrical command signal to said door opening means by causing said drive system to operate in such a way as to move the card to the second slot.
Dependencies are inferred from the claim text.