Loss prevention system
First Claim
Patent Images
1. A loss prevention system comprising:
- a protected article comprising a transmitter that emits an infrared signal, the infrared signal having a carrier frequency that is modulated to encode a digital signature,wherein the protected article is located in a room; and
a receiver that detects infrared signals, the receiver mounted at a fixed position within the room, the receiver performing an alarm action if the receiver does not detect within a rolling time window an infrared signal having the carrier frequency that is modulated to encode the digital signature,wherein the rolling time window is associated with the digital signature.
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Accused Products
Abstract
A loss prevention system comprises a protected article and a receiver. The protected article and the receiver are located in the same room. The loss prevention system can help to prevent loss or theft of the protected article. The protected article comprises a transmitter that emits an infrared signal. The infrared signal has a carrier frequency that is modulated to encode a digital signature. The receiver detects infrared signals. The receiver performs an alarm action if the receiver does not detect within a rolling time window an infrared signal having the carrier frequency that is modulated to encode the digital signature.
20 Citations
19 Claims
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1. A loss prevention system comprising:
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a protected article comprising a transmitter that emits an infrared signal, the infrared signal having a carrier frequency that is modulated to encode a digital signature, wherein the protected article is located in a room; and a receiver that detects infrared signals, the receiver mounted at a fixed position within the room, the receiver performing an alarm action if the receiver does not detect within a rolling time window an infrared signal having the carrier frequency that is modulated to encode the digital signature, wherein the rolling time window is associated with the digital signature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of installing a loss prevention system, the method comprising:
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placing a protected article in a room, the protected article comprising a transmitter that emits an infrared signal, the infrared signal having a carrier frequency that is modulated to encode a digital signature; mounting a receiver in the room, the receiver detecting infrared signals, the receiver mounted at a fixed position within the room, the receiver performing an alarm action if the receiver does not detect within a rolling time window an infrared signal having the carrier frequency that is modulated to encode the digital signature, wherein the rolling time window is associated with the digital signature; and after mounting the receiver in the room, programming the receiver to perform the alarm action when the receiver does not detect within the rolling time window the infrared signal having the carrier frequency that is modulated to encode the digital signature. - View Dependent Claims (17, 18)
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19. A method of installing a loss prevention system, the method comprising:
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placing a protected article in a room, the protected article comprising a transmitter that emits an infrared signal, the infrared signal having a carrier frequency that is modulated to encode a digital signature; mounting a receiver in the room, the receiver detecting infrared signals, the receiver mounted at a fixed position within the room, the receiver performing an alarm action if the receiver does not detect within a rolling time window an infrared signal having the carrier frequency that is modulated to encode the digital signature, wherein the rolling time window is associated with the digital signature; after mounting the receiver in the room, programming the receiver to perform the alarm action when the receiver does not detect within the rolling time window the infrared signal having the carrier frequency that is modulated to encode the digital signature; connecting the receiver to a communications network; and activating the transmitter of the protected article.
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Specification