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公开(公告)号：US5401584A
公开(公告)日：1995-03-28
申请号：US118723
申请日：1993-09-10
CPC分类号： G08B13/2411 , G08B13/2437 , G08B13/244 , G08B13/2442 , G08B13/2445 , Y10T428/12465 , Y10T428/12493
摘要： A deactivatable electronic theft detection marker is made from a strip or ribbon of high magnetic permeability strip or ribbon and then high magnetic coercivity material is deposited on the strip or ribbon by electroplating.
摘要翻译： 可钝化的电子防盗检测标记由高磁导率带或带的带或带制成，然后通过电镀将高磁矫顽力材料沉积在带或带上。
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公开(公告)号：US5126720A
公开(公告)日：1992-06-30
申请号：US642359
申请日：1991-01-17
申请人： Peter Y. Zhou , Thomas P. Solaski , Dexing Pang
发明人： Peter Y. Zhou , Thomas P. Solaski , Dexing Pang
CPC分类号： G08B13/2411
摘要： Articles of merchandise (42) which contain deactivatable theft detection targets (44) have their targets deactivated by passing them through a box-like apparatus (30) made of low coercive force, high saturation induction material with a multiplicity of permament magnets (48) on its inside surfaces so as to generate magnetic fields which extend at different directions and at decreasing intensities from one end of the apparatus to the other so that irrespective of a target's orientation while passing through the apparatus, the target's magnetic deactivation slugs or elements will encounter a magnetizing field along the target's length sufficient to magnetize the elements.
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3.发明授权Theft detection apparatus and flattened wire target and method of making same 失效电力检测装置和扁平电线目标及其制造方法
公开(公告)号：US5146204A
公开(公告)日：1992-09-08
申请号：US630855
申请日：1990-12-20
申请人： Peter Y. Zhou , Thomas P. Solaski
发明人： Peter Y. Zhou , Thomas P. Solaski
CPC分类号： G08B13/2408 , G08B13/2411 , G08B13/2437 , G08B13/244 , G08B13/2442 , G11B23/023 , G11B33/0488
摘要： Items of merchandise (30) are protected from shoplifting or theft by affixing to them special responder targets (32), which are formed by drawing a material of high magnetic permeability into a thin wire and thereafter rolling the wire into a flattened strip and annealing the strip and severing the strip into individual lengths. The flattened strip may be positioned on an adhesively coated base strip (42) and covered by a peel strip (46). Slug-like deactivation elements (48) of hard magnetic material may be positioned along the strip for deactivating it.
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公开(公告)号：US5963173A
公开(公告)日：1999-10-05
申请号：US985941
申请日：1997-12-05
申请人： Ming-Ren Lian , Thomas P. Solaski
发明人： Ming-Ren Lian , Thomas P. Solaski
CPC分类号： G08B13/2477 , G08B13/2471 , G08B13/2474 , H01Q11/14 , H01Q7/005 , H01Q7/04
摘要： An antenna system for an electronic article surveillance system, comprising: a first, tunable transmitting loop; a second, tunable transmitting loop, the first and second transmitting loops being arranged for first and second modes of operation, the transmitting loops being field-coupled to one another such that tuning the antenna system for one of the modes of operation detunes the antenna system for the other mode of operation; a tunable compensation coil field-coupled to each of the first and second transmitting loops, the tunable compensation coil enabling the antenna system to be tuned for operation in one of the modes at a first resonant frequency, and despite the detuning, enabling the antenna system to be tuned for operation in the other of the modes at a second resonant frequency independently of the tuning for the first mode of operation. The first and second resonant frequencies can be the same as or different from one another. One of the first and second modes of operation is as an in-phase rectangular loop and the other of the first and second modes of operation is as a "figure-8". The compensation loop encircles the first and second transmitting loops.
摘要翻译： 一种用于电子物品监视系统的天线系统，包括：第一可调谐发射环; 第二可调谐发射环路，所述第一和第二发射环路被布置用于第一和第二操作模式，所述发射环路彼此场耦合，使得对所述操作模式之一调谐所述天线系统将所述天线系统 用于其他操作模式; 场谐振耦合到第一和第二发射环路中的每一个的可调谐补偿线圈，所述可调谐补偿线圈使天线系统能够以第一谐振频率在所述模式之一中进行调谐，并且尽管失谐，但是天线系统 被调谐以在第二谐振频率下的另一种模式下操作，而与第一操作模式的调谐无关。 第一和第二谐振频率可以彼此相同或不同。 第一和第二操作模式中的一个是作为同相矩形环，并且第一和第二操作模式中的另一个是“图-8”。 补偿回路包围第一和第二发送回路。
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5.发明授权Electromagnetic sensor element and methods and apparatus for making and using same 失效电磁传感器元件及其制造和使用的方法和装置
公开(公告)号：US5029291A
公开(公告)日：1991-07-02
申请号：US506775
申请日：1990-04-10
CPC分类号： G08B13/2408 , G08B13/2411 , G08B13/2437 , G08B13/244 , G08B13/2442 , G08B13/2471 , G08B13/2474 , G08B13/2488 , H01F1/15316 , H01F1/15341 , H01F1/0009 , Y10S428/90
摘要： A novel sensor element having low magnetic coercivity and an asymmetric hysteresis characteristic is formed by heating a strip of cobalt alloy in an exidizing atmosphere to form an oxide coating thereon and then the strip is cooled in the presence of a magnetic field of about 0.3 oersteds along its length. The strip is detected by subjecting it to an alternating magnetic interrogation field and passing the resulting magnetic disturbances through signal processing circuits which select pulses produced only once in each interrogation field cycle. The element is deactivated by subjecting it to a magnetic field which eliminates its asymmetry.
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