Electronic identification system employing a data bearing identification card

Claim 2

An electronic identification system employing a data bearing identification card comprising: means for receiving said card; means for sensing the data on said card; keyboard means for accepting a manually entered identification code; data scrambling means connected to said sensing means for modifying the data sensed from said card in order to affect coincidence between said sensed data and said identification code; means for comparing said manually entered identification code with the modified data sensed from said card; and means operable by said comparing means when said modified data coincides with said identification code to cause said receiving means to release said received card.

Claim 3

A system as defined in claim 1 including: means for changing said data on said card after said comparing means has detected coincidence between said data and said identification code, and prior to release of said received card.

Claim 4

An electronic identification system comprising: a data-bearing card; means for receiving said card; sensing means responsive to the data on said card to establish a first digital count; keyboard means for accepting a manually entered preset code; scramble board means connected with said keyboard means to provide a second digital count corresponding to a re-encoding of said preset code; means for comparing said second digital count from said scramble board means with said first digital count from said sensing means; and means operable by said comparing means when said second digital count and said first digital count do not coincide, to cause a power circuit closure.

Claim 5

An electronic identification system comprising: a data-bearing card; means for receiving said card; sensing means responsive to the data on said card to establish a first digital count; keyboard means for accepting a manually entered preset code; scramble board means connected with said keyboard means to provide a second digital count corresponding to a re-encoding of said preset code; means for comparing said second digital count from said scramble board means with said first digital count from said sensing means; and means operable by said comparing means when said second digital count and said first digital count do not coincide, to cause a power circuit closure.

Claim 6

An electronic identification system as defined in claim 3 including: means responsive to said comparing means for selectively changing said data on said card when said first digital count coincides with said second digital count.

Claim 7

An electronic identification system as defined in claim 3 including: an alarm connected to said power circuit closure means, and responsive thereto to signal a lack of coincidence between said first digital count and said second digital count.

Claim 8

An electronic identification system as defined in claim 3 including: a code scrambler connected between said sensing means and said comparing means and responsive to said keyboard means for re-encoding the data sensed from said card prior to its transmission to said comparing means, in accordance with said preset code.

Claim 9

An electronic identification system comprising: a data-bearing card; means for receiving said card; sensing means responsive to the data on said card to provide a first digital count; keyboard means for receiving a manually entered preset code; scrambler means connected with said keyboard means and adapted to provide a second digital count corresponding to a re-encoding of said preset code; means for comparing said second digital count from said scrambler means with said first digital count received in said sensing means; and power circuit means responsive to said comparing means when said first and second digital counts do not coincide, to cause a power circuit closure.

Claim 10

An electronic identification system comprising: a data-bearing card; means for receiving said card; sensing means responsive to the data on said card to provide a first digital count; keyboard means for receiving a manually entered preset code; scrambler means connected with said keyboard means and adapted to provide a second digital count corresponding to a re-encoding of said preset code; means for comparing said second digital count from said scrambler means with said first digital count received in said sensing means; and power circuit means responsive to said comparing means when said first and second digital counts do not coincide, to cause a power circuit closure.

Claim 11

An electronic identification system as defined in claim 7 including: means for selectively changing the data on said card if said comparing means detects coincidence between said first and second digital counts.

Claim 12

An electronic identification system as defined in claim 7 including: an alarm connected to said power circuit means and responsive to the power circuit closure thereof to signal a lack of coincidence between said first and second digital counts.

Claim 13

An electronic identification system as defined in claim 7 including: an electromechanical barrier connected to said power circuit means and operable in response to said power circuit closure.

Claim 14

An electronic identification system as defined in claim 8 including: second scrambler means connected between said keyboard means and said selective changing means for re-encoding said preset code in accordance with the changes made in said data by said selective changing means.

Claim 15

An electronic identification system comprising: a data-bearing card; means for receiving said card; sensing means responsive to the data on said card to establish a first digital count; keyboard means for accepting a manually entered preset code; scramble board means connected with said keyboard means and adapted to provide a second digital count corresponding to a re-encoding of said preset code; means for comparing said second digital count with said first digital count; and means operable by said comparing means when coincidence exists between said first and second digital counts to release said card from said receiving means.

Claim 16

An electronic identification system comprising: a data-bearing card; means for receiving said card; sensing means responsive to the data on said card to establish a first digital count; keyboard means for accepting a manually entered preset code; scramble board means connected with said keyboard means and adapted to provide a second digital count corresponding to a re-encoding of said preset code; means for comparing said second digital count with said first digital count; and means operable by said comparing means when coincidence exists between said first and second digital counts to release said card from said receiving means.

Claim 17

A plant security system for selectively controlling a barrier in a passageway in response to a code entered into a manual keyboard and a code automatically sensed from an identification card comprising, barrier means controlling the open and closed condition of said passageway, actuator means for operating said barrier means, means for receiving said card, means for sensing the code from said card, scrambling means for modifying the data sensed from said card in order to effect coincidence between said sensed data and the code entered into said keyboard, comparing means for comparing data from said keyboard with the modified data from said scrambled means, and means operable by said comparing means to energize said actuator means and control said barrier to maintain said passage in an open condition.

Claim 18

A plant security system for selectively controlling a barrier in a passageway in response to a code entered into a manual keyboard and a code automatically sensed from an identification card comprising, barrier means controlling the open and closed condition of said passageway, actuator means for operating said barrier means, means for receiving said card, means for sensing the code from said card, scrambling means for modifying the data sensed from said card in order to effect coincidence between said sensed data and the code entered into said keyboard, comparing means for comparing data from said keyboard with the modified data from said scrambled means, and means operable by said comparing means to energize said actuator means and control said barrier to maintain said passage in an open condition.

Claim 19

A plant security system as defined in claim 13 including means to automatically close said barrier means after a predetermined interval.

Claim 20

A plant security system as defined in claim 13 wherein said scrambling means includes means for selectively rearranging the code sensed from said card.

Claim 21

A plant security system as defined in claim 13 wherein said comparing means includes means for selectively rearranging the code from said keyboard.

Claim 22

A plant security system as defined in claim 13 wherein said means for sensing the code from said card is adapted to erase and re-encode the code on said card after sensing the data from said card.

Claim 23

A plant security system as defined in claim 13 wherein said barrier means comprises first and second gate means, and means responsive to said comparing means for selectively operating said gate means to close said passageway and thereafter open said passageway in response to identical codes being supplied to said comparing means from said scrambling means and said keyboard.

Claim 24

An electronic identification system for controlling the admittance of entrants through a passageway comprising, barrier means for controlling the open and closed condition of said passageway, means for selectively controlling said barrier means to permit an entrant to proceed through said passageway, said controlling means comprising means for receiving an encoded identification card carried by said entrant, keyboard means operable by said entrant to place a code in said controlling means, said card having thereon two distinct groups of encoded information, and comparing means for simultaneously reading both groups of information from said card and comparing same with the code placed in said controlling means from said keyboard means, said controlling means being responsive to said comprising means to open said barrier means to permit said entrant to proceed through said passageway when at least one group of information on said card compares with the information in said controlling means.

Claim 25

An electronic identification system for controlling the admittance of entrants through a passageway comprising, barrier means for controlling the open and closed condition of said passageway, means for selectively controlling said barrier means to permit an entrant to proceed through said passageway, said controlling means comprising means for receiving an encoded identification card carried by said entrant, keyboard means operable by said entrant to place a code in said controlling means, said card having thereon two distinct groups of encoded information, and comparing means for simultaneously reading both groups of information from said card and comparing same with the code placed in said controlling means from said keyboard means, said controlling means being responsive to said comprising means to open said barrier means to permit said entrant to proceed through said passageway when at least one group of information on said card compares with the information in said controlling means.

Claim 26

An electronic identification system as defined in claim 19 including detector means responsive to the presence of an entrant in said passageway for preconditioning said controlling means to selectively close said barrier means.

Claim 27

In a system as defined in claim 20 wherein said detector means comprises first and second treadle switches, said treadle switches being mounted on the floor of said passageway and adapted to be closed by said entrant when in said passageway.

Claim 28

In a system as defined in claim 20 wherein said detector means comprises first and second photoelectric means each responsive to first and second light beams, respectively, across said passageway, the output of said photoelectric means indicating the direction of travel of said entrant through said passageway as determined by the sequence in which said first and second light beams are interrupted.

Claim 29

An electronic identification system for controlling the admittance of entrants through a passageway comprising, barrier means for controlling the open and closed condition of said passageway, means for selectively controlling said barrier means to permit an entrant to proceed through said passageway, and controlling means comprising means for receiving an encoded identification card carried by said entrant, keyboard means operable by said entrant to place a code in said controlling means, and comparing means for reading the information encoded in said card and comparing same with the code placed in said controlling means from said keyboard means, said controlling means being responsive to said comparing means to open said barrier means to permit said entrant to proceed through said passageway when the information encoded in said card is identical to the information placed in said keyboard means.

Claim 30

An electronic identification system for controlling the admittance of entrants through a passageway comprising, barrier means for controlling the open and closed condition of said passageway, means for selectively controlling said barrier means to permit an entrant to proceed through said passageway, and controlling means comprising means for receiving an encoded identification card carried by said entrant, keyboard means operable by said entrant to place a code in said controlling means, and comparing means for reading the information encoded in said card and comparing same with the code placed in said controlling means from said keyboard means, said controlling means being responsive to said comparing means to open said barrier means to permit said entrant to proceed through said passageway when the information encoded in said card is identical to the information placed in said keyboard means.

Claim 31

An electronic identification system as defined in claim 23 including detector means responsive to the presence of an entrant in said passageway for preconditioning said controlling means to selectively close said barrier means.

Claim 32

In a system as defined in claim 23 wherein said detector means comprises first and second treadle switches, said treadle switches being mounted on the floor of said passageway and adapted to be closed by said entrant when in said passageway.

Claim 33

In a system as defined in claim 23 wherein said detector means comprises first and second photoelectric means each responsive to first and second light beams, respectively, across said passageway, the output of said photoelectric means indicating the direction of travel of said entrant through said passageway as determined by the sequence in which said first and second light beams are interrupted.

Claim 34

An electronic identification system for controlling the admittance of entrants through a passageway comprising, barrier means for controlling the open and closed condition of said passageway, means for selectively controlling said barrier means to permit an entrant to proceed through said passageway, said controlling means comprising means for receiving an identification card, carried by said entrant, having at least two distinctly different sets of data encoded thereon, keyboard means operable by said entrant to place a code in said controlling means, and comparing means for reading said sets of encoded data and comparing same with the code placed in said controlling means from said keyboard means, said controlling means being responsive to said comparing means to open said barrier means to permit said entrant to proceed through said passageway when said sets of encoded data coincide with the information in said controlling means.

Claim 35

An electronic identification system for controlling the admittance of entrants through a passageway comprising, barrier means for controlling the open and closed condition of said passageway, means for selectively controlling said barrier means to permit an entrant to proceed through said passageway, said controlling means comprising means for receiving an identification card, carried by said entrant, having at least two distinctly different sets of data encoded thereon, keyboard means operable by said entrant to place a code in said controlling means, and comparing means for reading said sets of encoded data and comparing same with the code placed in said controlling means from said keyboard means, said controlling means being responsive to said comparing means to open said barrier means to permit said entrant to proceed through said passageway when said sets of encoded data coincide with the information in said controlling means.