Multiple access electronic lock system

Abstract

A door security system for controlling access through a door of a secured area by controlling a lock status of an associated locking unit of the door. The system includes an operator that operates the locking unit of the door, a key pad, a magnetic card reader, and a contact activatable data port. A data processor is responsive to the magnetic card reader, the data port, and the keypad for controlling the operator. Each of the keypad, the magnetic card reader, and the contact activatable data port can manipulate the lock status of the locking unit of the door. The data processor further comprises link means for requiring multiple entries for implementing the lock status of the door.

1 . A door security system for controlling access through a door of a secured area by controlling a lock status of an associated locking unit of the door, the system comprising: 
 an operator operating the locking unit of the door;    a key pad;    a magnetic card reader;    a contact activatable data port; and    a data processor responsive to said magnetic card reader, said data port, and said keypad for controlling said operator, such that each of the keypad, the magnetic card reader, and the contact activatable data port can manipulate the lock status of the locking unit of the door;    wherein said data processor further comprises link means for requiring multiple entries for manipulating the lock status of the door.    
   
   
       2 . The door security system of  claim 1 , further comprising key operated override means coupled to said operator for overriding the lock status of the door.  
   
   
       3 . The door security system of  claim 1 , wherein the contact activatable data port includes a data key reader having a first contact and a second contact.  
   
   
       4 . The door security system of  claim 3 , wherein the first contact is adapted to read a first type of ROM chip and the second contact is adapted to read a second type of ROM chip.  
   
   
       5 . The door security system of  claim 3 , wherein each of the first contact and the second contact define jack openings adapted to connect a computer to the locking unit.  
   
   
       6 . The door security system of  claim 5 , wherein data can be uploaded or downloaded to/from the computer via both the first contact and the second contact.  
   
   
       7 . A door security system comprising: 
 a lock operator adapted for selectively locking and unlocking a latch;    a console comprising a first portion mounted on an unsecured side of the door and a second portion mounted on a secured side of the door;    a key pad mounted in said first portion of said console;    a magnetic card reader adapted for receiving data from a card, said magnetic card reader being mounted in said first portion of said console;    a contact activatable data port adapted for receiving data from a key, said data port being mounted in said first portion of said console;    a memory mounted in said second portion of said console, said memory storing at least one valid personal access code; and    a data processor mounted in said second portion of said console, said data processor communicating with said memory, said card reader, said data port, said keypad, and said lock operator, said data processor comprising: 
 input means for receiving data from said magnetic card reader, said data port and said keypad and identifying an access code input;  
 input validation means for validating the key or card, the input validation means providing an input valid signal if the key or card is valid;  
 code comparison means responsive to said input valid signal for comparing said access code to at least one valid access code stored in said memory, said code comparison means generating a first permissive signal in response to a positive comparison; and  
   release means responsive to said first permissive signal for generating a release signal to said lock operator    wherein said input validation means comprises master code determination means for determining whether the access code is a master code, said master code determination means generating said input valid, signal if the access code is a master code.    
   
   
       8 . The door security system of  claim 7  wherein said release means comprises: 
 linked attribute determination means responsive to said first permissive signal for determining whether a linked attribute must also be entered at said keypad, said linked attribute determination means generating a release signal if a linked attribute is not required, said linked attribute determination means generating a second permissive signal if a linked attribute is required;    query means responsive to said second permissive signal for querying said keypad for a personal identification number;    PIN comparison means for comparing said personal identification number to at least one valid personal identification number stored in said memory means, said PIN comparison means generating said release signal in response to a positive comparison.    
   
   
       9 . The door security system of  claim 7  wherein said input validation means comprises: 
 LRC receiving means for receiving a longitudinal redundancy check signal from the card;    LRC calculator means for providing a calculated longitudinal redundancy check signal for the card;    LRC comparison means for comparing the longitudinal redundancy check signal of the LRC receiving means to the calculated longitudinal redundancy check signal, said LRC comparison means generating said input valid signal in response to a positive comparison.    
   
   
       10 . The door security system of  claim 7  wherein said input validation means comprises: 
 CRC receiving means for receiving a cyclic redundancy check signal from the key;    CRC calculator means for providing a calculated cyclic redundancy check signal for the key;    CRC comparison means for comparing the cyclic redundancy check signal of the CRC receiving means to the calculated cyclic redundancy check signal, said CRC comparison means generating said input valid signal in response to a positive comparison.    
   
   
       11 . The door security system of  claim 11  wherein said input validation means comprises expiration determination means for determining whether or not the access code has expired, said expiration determination means generating said input valid signal in response to a determination that the access code has not expired.  
   
   
       12 . The door security system of  claim 7 , further comprising key operated override means coupled to said operator for overriding the lock status of the door.  
   
   
       13 . The door security system of  claim 7 , wherein the contact activatable data port includes a data key reader having a first contact and a second contact.  
   
   
       14 . The door security system of  claim 13 , wherein the first contact is adapted to read a first type of ROM chip and the second contact is adapted to read a second type of ROM chip.  
   
   
       15 . The door security system of  claim 13 , wherein each of the first contact and the second contact define jack openings adapted to connect a computer to the locking unit.  
   
   
       16 . The door security system of  claim 15 , wherein data can be uploaded or downloaded to/from the computer via both the first contact and the second contact.  
   
   
       17 . An access control system operable to control access to a door by a plurality of users, at least some of the users defining a user code, a card data, and a contact data categorized in one of at least two groups, the system comprising: 
 a latch movable between a locked position and an unlocked position;    an operator coupled to the latch and operable to move the latch between the locked position and the unlocked position;    a key pad operable to receive a user code;    a magnetic card reader operable to read card data from a magnetic strip of a card;    a contact activatable data port operable to read contact data from a ROM chip; and    a data processor operable to move the latch from the locked position to the unlocked position in response to one of the user code, the card data, and the contact data corresponding to one of a user code, a card data, and a contact data categorized in a first group.    
   
   
       18 . The access control system of  claim 17 , wherein the data processor is operable to query a user to enter a PIN in response to one of the user code, the card data, and the contact data corresponding to one of a user code, a card data, and a contact data categorized in a second group.  
   
   
       19 . The access control system of  claim 18 , wherein the data processor is operable to move the latch from the locked position to the unlocked position in response to an entered PIN corresponding to a user PIN.  
   
   
       20 . The access control system of  claim 17 , further comprising a key-operated lock coupled to the operator and operable to move the latch from the locked position to the unlocked position.