Multi-mode electronic article surveillance system
First Claim
Patent Images
1. An electronic article surveillance system for detecting the presence of articles passing through an interrogation zone, the articles carrying tags including magnetic markers, comprising:
- first means from transmitting magnetic energy into said zone and for receiving magnetic energy including magnetic energy from said zone, said first means having at least first and second different modes of operation in which magnetic energy is transmitted into said zone;
and second means responsive to said first means and for controlling said first means to operate in at least said first and second modes in order to make a determination as to the presence of an article in said zone.
2 Assignments
0 Petitions
Accused Products
Abstract
A magnetic article surveillance system in which surveillance is carried out by operating the system in first and second different modes of a magnetic transmitting and receiver means in order to make a determination as to the presence of an article in the zone.
37 Citations
62 Claims
-
1. An electronic article surveillance system for detecting the presence of articles passing through an interrogation zone, the articles carrying tags including magnetic markers, comprising:
-
first means from transmitting magnetic energy into said zone and for receiving magnetic energy including magnetic energy from said zone, said first means having at least first and second different modes of operation in which magnetic energy is transmitted into said zone; and second means responsive to said first means and for controlling said first means to operate in at least said first and second modes in order to make a determination as to the presence of an article in said zone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
-
-
34. A method for use with an electronic article surveillance system for detecting the presence of articles passing through an interrogation zone, the articles carrying tags including magnetic markers, comprising:
-
transmitting magnetic energy into said zone and receiving magnetic energy including magnetic energy from said zone, said transmitting and receiving being capable of operating in at least first and second different modes of operation in which magnetic energy is transmitted into said zone; and controlling said transmitting and receiving to operate in at least said first and second modes in order to make a determination as to the presence of an article in said zone. - View Dependent Claims (35, 36, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
-
-
37. A method in accordance with clam 34 wherein:
-
said transmitting and receiving is carried out using a first transmitter for transmitting magnetic energy into said zone and first and second receivers for receiving magnetic energy including magnetic energy from said zone;
said first and second receivers being such that the degree of coupling of magnetic energy between said first transmitter and said first receiver is greater than the degree of coupling of magnetic energy between said first transmitter and said second receiver;and said controlling includes causing during said first mode said first transmitter and second receiver to be in an active state and said first receiver to be in an inactive state and during said second mode said first transmitter and first receiver to be in an active state.
-
-
59. An electronic article surveillance system for detecting the presence of articles passing through an interrogation zone, the articles carrying tags including magnetic markers, comprising:
-
first means for transmitting magnetic energy into said zone and for receiving magnetic energy including magnetic energy from said zone, said first means having at least first and second different modes of operation in both of which magnetic energy is transmitted into and received from said zone; and second means responsive to said first means and for controlling said first means to operate in at least said first and second modes in order to make a determination as to the presence of an article in said zone.
-
-
60. An electronic article surveillance system for detecting the presence of articles passing through an interrogation zone, the articles carrying tags including magnetic markets, comprising:
-
first means for transmitting magnetic energy into said zone and for receiving magnetic energy including magnetic energy from said zone, said first means having at least first and second different modes of operation in which magnetic energy is received from said zone; and second means responsive to said first means and for controlling said first means to operate in at least said first and second modes in order to make a determination as to the presence of an article in said zone.
-
-
61. A method for use with an electronic article surveillance system for detecting the presence of articles passing through an interrogation zone, the articles carrying tags including magnetic markers, comprising:
-
transmitting magnetic energy into said zone and receiving magnetic energy from said zone, said transmitting and receiving being capable of operating in at least first and second different modes of operation in both of which magnetic energy is transmitted into and received from said zone; and controlling said transmitting and receiving to operate in at least said first and second modes in order to make a determination as to the presence of an article in said zone.
-
-
62. A method for use with an electronic article surveillance system for detecting the presence of articles passing through an interrogation zone, the articles carrying tags including magnetic markers, comprising:
-
transmitting magnetic energy into said zone and receiving magnetic energy including magnetic energy from said zone, said transmitting and receiving being capable of operating in at least first and second different modes of operation in which magnetic energy is received from said zone; and controlling said transmitting and receiving to operate in at least said first and second modes in order to make a determination as to the presence of an article in said zone.
-
Specification