Electronic door access control system

• US 9,728,017 B2
• Filed: 02/28/2014
• Issued: 08/08/2017
• Est. Priority Date: 03/01/2013
• Status: Expired due to Fees

• Current Assignee: Yves Paquin
• Original Assignee: Yves Paquin
• Inventors: Paquin, Yves
• Primary Examiner(s): Feild, Joseph
• Assistant Examiner(s): Casillashernandez, Omar
• Application Number:
  US14/193,727
• Publication Number:
  US 20140247113A1
• Time in Patent Office: 1,257 Days
• Field of Search: 340 565, 340 523, 340 56, 235382, 29234116
• CPC Class Codes: E05B 47/0047 Striker rotating about an axis parallel to the wing edge
• CPC Class Codes: G07C 2209/62 Comprising means for indicating the status of the lock
• CPC Class Codes: G07C 9/00174 Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys mechanical locks with electric permutation E05B49/00; arrangements for sensing or reading record carriers G06K7/00; electronic switching H03K17/00
• CPC Class Codes: G07C 9/00563 using personal physical data of the operator, e.g. finger prints, retinal images, voicepatterns
• CPC Class Codes: G07C 9/0069 actuated in a predetermined sequence
• CPC Class Codes: G07C 9/20 involving the use of a pass

Abstract

An electronic door lock system comprising a door control unit, a key reader and an encrypted binding between the key reader and the door control unit. When tampering is detected the encrypted binding is terminated thereby preventing the door from being opened. There is also disclosed a method for retrofitting a door comprising a key reader with a door control unit. The door control unit, key reader and the latch release mechanism may also be powered by a key comprising a power supply, the key also supplying a coded sequence to the door control unit.

Claims

1. An electronic door access control apparatus for restricting access via a door installed in a door frame and comprising a lock mechanism having a latch bolt and using a key comprising a unique coded ID sequence, the apparatus comprising:

a key reader for reading the key and comprising a tamper switch;

a latch release mechanism;

a door control unit separate from said key reader and said latch release mechanism, installed in the door frame proximate to said key reader and said latch release mechanism and comprising a controller and memory comprising a plurality of predetermined allowed coded ID sequences, wherein said door control unit is operationally connected to said tamper switch; and

an encrypted binding interconnecting said key reader and said door control unit, wherein said encrypted binding is established by one of an external programming device and a master key card;

wherein when the key is positioned proximate to said key reader, the coded ID sequence is read by the key reader and relayed to said door control unit via an encrypted communication channel interconnecting said key reader and said door control unit for processing, wherein when the coded ID sequence matches one of said plurality of predetermined allowed coded ID sequences, said door control unit actuates said latch release mechanism, thereby allowing the door to be opened, and further wherein when said door control unit detects tampering of said key reader via said tamper switch, said encrypted binding between said key reader and said door control unit is terminated, thereby preventing actuation of said latch release mechanism.

2. The apparatus of claim 1, wherein said key reader comprises a screen and an input interface for manually entering a password and further wherein said password is relayed to said door control unit via said encrypted communication channel for processing with the unique coded ID.

3. The apparatus of claim 2, wherein said input interface comprises one of a key pad and a proximity sensor using an electric field for sensing and recognizing the motion of a user'"'"'s hand or finger.

4. The apparatus of claim 1, wherein the lock mechanism comprises a latch bolt and wherein said latch release mechanism is configured for receiving said latch bolt and comprises a striker plate and a solenoid and further wherein said door control unit actuates said latch release mechanism by activating the solenoid, thereby releasing said striker plate.

5. The apparatus of claim 1, wherein once terminated said encrypted binding between said key reader and said door control unit can only be reestablished by reprogramming said door control unit.

6. The apparatus of claim 1, wherein said key reader is interconnected with said door control unit and said tamper switch via a wired connection.

7. An electronic door access control system for restricting access via a door comprising a lock mechanism, the system comprising:

a key comprising a power source, a unique coded ID sequence and a key memory;

a key reader for reading said key;

a latch release mechanism;

a door control unit comprising a controller, a real time clock, a door control unit memory and a door identifier; and

an encrypted binding interconnecting said key reader and said door control unit, wherein said encrypted binding is established by one of an external programming device and a master key card,

wherein when said key is positioned proximate to said key reader, said power source provides power for operating said key reader, said latch release mechanism and said door control unit, the coded ID sequence is read by said key reader and relayed to said door control unit and further wherein when the coded ID sequence matches one of said plurality of predetermined allowed coded ID sequences, said door control unit actuates said latch release mechanism, thereby allowing the door to be opened, and further wherein a time stamp and said door identifier is relayed to said key for storage in said key memory, and

and further wherein when said door control unit detects tampering of said key reader via said tamper switch, said encrypted binding between said key reader and said door control unit is terminated, thereby preventing actuation of said latch release mechanism.

8. The system of claim 7, wherein said key is held removeably against said key reader by a magnet.

9. The system of claim 8, wherein said key further comprises a normally open microswitch between said power source and at least one of said pair of contacts and wherein when said microswitch is closed by contact with said key reader an electrical circuit is completed between said power supply and said contacts.

10. The system of claim 7, wherein once said solenoid is actuated, a voltage across said output of said charge pump is lowered to a holding voltage lower than said actuating voltage.

11. The system of claim 7, wherein said key voltage is less than 3 volts and said actuating voltage is greater than 12 volts.