Data processing apparatus with portable card having magnetic strip simulator

• US 4,786,791 A
• Filed: 02/10/1987
• Issued: 11/22/1988
• Est. Priority Date: 02/10/1987
• Status: Expired due to Fees

• Current Assignee: Gateway Technology 353 Sacramento Street San Francisco CA
• Original Assignee: Gateway Technologies, Inc. (Cognizant Technology Solutions Corp.)
• Inventors: Hodama, Takuo
• Primary Examiner(s): Pitts, Harold I.
• Application Number:
  US07/012,944
• Time in Patent Office: 651 Days
• Field of Search: 235/449, 235/482
• US Class Current: 235/449
• CPC Class Codes: G06K 19/06206 the magnetic marking being emulated
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
• CPC Class Codes: G06K 7/10336 the antenna being of the near field type, inductive coil

Abstract

A data card using a simulator for magnetic stripes in generating a data signal. The data signal is read by a magnetic coil, having a drive signal provided to the coil by a circuit on the card which simulates the magnetic flux reversals of the magnetic stripes.

Claims

1. A transaction card including a magnetic stripe simulator for providing a signal to the read head of a magnetic stripe reader comprising,

coil means for providing a signal to the read head,

circuit means for providing a drive signal to the coil, said circuit means including means for providing a bit pattern which simulates the magnetic flux reversals provided from magnetic stripes.

2. The apparatus of claim 1 wherein said circuit means includes a digital memory for storing digital data, includes address means for addressing said memory, and includes output means for connecting the output data from said memory to said coil whereby the magnetic stripe simulation data is read from said memory for driving said coil.

3. The apparatus of claim 1 wherein said coil includes a high mu metal core and a multiturn winding wrapped around said core and wherein said core and said winding are embedded in said card.

4. The apparatus of claim 3 wherein the number of turns is approximately 80 turns of wire having approximately a 0.006 diameter.

5. The apparatus of claim 3 wherein said card is formed of a multilayer structure wherein said multilayer structure includes printed wiring for connecting said circuit to said coil windings.

6. The apparatus of claim 1 wherein said circuit means includes clock means, counter means incremented by said clock, a read only memory addressed by said counter means, a data selector means for selecting outputs from said memory means to provide said drive signal, and reset means for resetting said counter means for each cycle of said counter means.

7. The apparatus of claim 6 wherein said circuit means includes switch actuator means for actuating said circuit means whenever said switch is actuated.

8. The apparatus of claim 7 wherein said switch means includes counter means for counting the number of cycles of said circuit means and for terminating the operation of said circuit means after a predetermined number of cycles.

9. The apparatus of claim 3 wherein said coil is located approximately 0.4 inch from an edge of said card.

10. The apparatus of claim 3 wherein said circuit includes a pressure actuated switch for actuating said circuit means.

11. The apparatus of claim 10 wherein said pressure actuated switch is adapted to be actuated through pressure contact with said read head.

12. The apparatus of claim 1 wherein said card includes a multilayer structure including a first outer layer, a first inner layer having metalization for inner connecting integrated circuits and said coil, a spacer layer, a second metalization layer, said second metalization layer including means for forming a switch through said spacer layer with said first metalization layer and including a second outer layer.

13. The apparatus of claim 12 wherein said first and second outer layers have a thickness of approximately 0.004 inch whereby the gap between said coil and the read head is approximately 0.004 inch.

14. The apparatus of claim 8 wherein said counter counts through eight cycles whereby eight complete cycles of said circuit means occur after each actuation of said switch.

15. The apparatus of claim 6 wherein said clock operates at approximately within the range of from 10 to 2000 Hz.

16. A portable transaction card for providing a signal to the read head of a magnetic stripe reader comprising,

a plastic laminate including at least first and second outer layers compressed together so as to have a thickness of less than approximately 0.030 inch,

a magnetic stripe simulator encapsulated between said first and second outer layers including,

coil means for providing a signal detectable by a read head, said coil means having a magnetic core and a multiturn winding around said core,

circuit means for providing a drive signal having logical one and logical zero data values to the coil for providing a bit pattern which simulates the magnetic flux reversals provided from magnetic stripes, said circuit means including a digital memory for storing binary bits where the number of binary bits representing the zero data values are different than the number of bits representing a one data value, including address means for addressing said memory, and including output means for connecting the output binary bits from said memory to said coil.