Apparatus for prevention of reading of magnetic cards
First Claim
1. A card reading machine comprising:
- a card reader operable to read data on a magnetic card by receiving data signals generated in the card reader as the magnetic card is passed along the card reader, the data signals being at a select frequency range; and
a device for preventing reading of the data on the magnetic card by an illegal card reading device operatively associated with the card reading machine, the illegal card reading device reading data on the magnetic card by receiving signals generated in the illegal card reading device as the magnetic card is passed along the illegal card reading device corresponding to the data signals, the signals generated by the illegal card reading device being at the select frequency range of the data signals,wherein the device for preventing reading comprises an oscillator, a driver circuit and a coil for generating variable preventing signals at the select frequency range when the magnetic card is passed along the illegal card reading device, the variable preventing signals and the signals generated in the illegal card reading device as the magnetic card is passed along the illegal card reading device combining at the illegal card reading device to form a combined signal at the select frequency range from which the variable preventing signals and the signals generated in the illegal card reading device as the magnetic card is passed along the illegal card reading device cannot in practice be filtered from each other, such that the illegal card reading device cannot read the magnetic card data of the magnetic card.
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Accused Products
Abstract
A card reading machine includes a card reader for reading data on a magnetic card and a device for preventing reading of the data on the magnetic card by illegal card reading devices operatively associated with the card reading machine. The device for preventing may include an oscillator, a driver circuit and a coil for generating electromagnetic signals similar to data on a card. A method for preventing reading of data on a magnetic card by in illegal card reader in operative association with an apparatus having a card reader intended to read the data on the magnetic card includes producing a signal ruining the data collected by the illegal card reader. The apparatus having a card reader may include an insertion slot in which case the method may further include producing the signal near the insertion slot.
65 Citations
17 Claims
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1. A card reading machine comprising:
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a card reader operable to read data on a magnetic card by receiving data signals generated in the card reader as the magnetic card is passed along the card reader, the data signals being at a select frequency range; and a device for preventing reading of the data on the magnetic card by an illegal card reading device operatively associated with the card reading machine, the illegal card reading device reading data on the magnetic card by receiving signals generated in the illegal card reading device as the magnetic card is passed along the illegal card reading device corresponding to the data signals, the signals generated by the illegal card reading device being at the select frequency range of the data signals, wherein the device for preventing reading comprises an oscillator, a driver circuit and a coil for generating variable preventing signals at the select frequency range when the magnetic card is passed along the illegal card reading device, the variable preventing signals and the signals generated in the illegal card reading device as the magnetic card is passed along the illegal card reading device combining at the illegal card reading device to form a combined signal at the select frequency range from which the variable preventing signals and the signals generated in the illegal card reading device as the magnetic card is passed along the illegal card reading device cannot in practice be filtered from each other, such that the illegal card reading device cannot read the magnetic card data of the magnetic card. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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- 11. A device for preventing reading of data on a magnetic card by an illegal card reading device on a card reading machine, the device comprising means for providing an electromagnetic field ruining the data obtained by the illegal card reader, wherein the means for providing the electromagnetic field comprises an oscillator, a driver circuit and a coil for generating variable preventing signals at the select frequency range of the signals generated in the illegal card reading device as the magnetic card is passed along the illegal card reading device which are combined with signals generated in the illegal card reading device to form a combined signal at the select frequency range from which the variable preventing signals and signals generated in the illegal card reading device as the magnetic card is passed along the illegal card reading device cannot in practice be filtered from each other, such that the illegal card reading device cannot record the magnetic card data of the magnetic card.
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15. A method of preventing reading of data on a magnetic card by an illegal card reader in operative association with an apparatus having a card reader intended to read the data on the magnetic card, the method comprising:
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producing a variable preventing signal preventing reading of the data collected by the illegal card reader, wherein the preventing signal is at the same frequency range as signals generated in the illegal card reader as the magnetic card is passed along the illegal card reader that the variable preventing signals and signals generated in the magnetic card reader as the magnetic card is passed along the illegal card reader create combined signals at the select frequency range which cannot in practice be filtered from each other, such that the illegal card reading device cannot read the magnetic card data of the magnetic card. - View Dependent Claims (16, 17)
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Specification