Wearable device with current carrying conductor to produce time-varying magnetic field
An electronic transaction card communicates with an add-on slot of an intelligent electronic device. The add-on slot may be a memory card slot. The intelligent electronic device may be a mobile phone or other device with or without network connectivity. The electronic transaction card may have magnetic field producing circuitry compatible with magnetic card readers, smartcard circuitry, other point-of-sale interfaces, or any combination thereof.
1. A wearable device comprising:
a memory to hold a transaction number; and
a conductor that when excited by a time-varying current produces a time-varying magnetic field that emanates from the wearable device and emulates a swipe of a magnetic card, wherein the time-varying magnetic field represents the transaction number and the transaction number is used repeatedly for each emission of the time-varying magnetic field to emulate the swipe of the magnetic card.
2. The wearable device of claim 1 wherein the time-varying magnetic field represents a point-of-sale transaction.
3. The wearable device of claim 1 wherein the time-varying magnet field represents an access transaction.
4. The wearable device of claim 1 further comprising circuitry to receive the transaction number from a network.
5. The wearable device of claim 4 wherein the circuitry to receive the transaction number from a network comprises circuitry to provide cellular network connectivity.
6. The wearable device of claim 4 wherein the wearable device comprises a watch.
7. A wearable device comprising:
a memory to hold a transaction number;
a conductor capable of producing a time-varying magnetic field that emanates from the wearable device and emulates a swipe of a magnetic card, wherein the time-varying magnetic field represents the transaction number and the transaction number is used repeatedly for each emission of the time-varying magnetic field to emulate the swipe of the magnetic card; and
a current driver to allow control of the time-varying magnetic field.
8. The wearable device of claim 7 wherein the time-varying magnetic field represents a point-of-sale transaction.
9. The wearable device of claim 7 wherein the time-varying magnet field represents an access transaction.
10. The wearable device of claim 7 further comprising circuitry to receive the transaction number from a network.
11. The wearable device of claim 10 wherein the circuitry to receive the transaction number from a network comprises circuitry to provide cellular network connectivity.
12. The wearable device of claim 10 wherein the wearable device comprises a watch.
13. A wearable device comprising:
a memory to hold a transaction number;
a wire capable of producing a time-varying magnetic field that emanates from the wearable device and emulates a swipe of a magnetic card when excited by a reversing polarity current that varies in amplitude, wherein the time-varying magnetic field represents the transaction number and the transaction number is used repeatedly for each emission of the time-varying magnetic field to emulate the swipe of the magnetic card; and
a current driver to allow control of the time-varying magnetic field.
14. The wearable device of claim 13 wherein the time-varying magnetic field represents a point-of-sale transaction.
15. The wearable device of claim 13 wherein the time-varying magnet field represents an access transaction.
16. The wearable device of claim 13 further comprising circuitry to receive the transaction number from a network.
17. The wearable device of claim 16 wherein the circuitry to receive the transaction number from a network comprises circuitry to provide cellular network connectivity.
18. The wearable device of claim 16 wherein the wearable device comprises a watch.