CA2149380C - Marqueur a frequence de resonance accordable pour la surveillance magnetomecanique d'articles - Google Patents

Marqueur a frequence de resonance accordable pour la surveillance magnetomecanique d'articles Download PDF

Info

Publication number: CA2149380C
Authority: CA; Canada
Prior art keywords: marker; biasing element; magnetostrictive; magnetic field; biasing
Prior art date: 1994-06-30
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired - Fee Related

Application number

CA 2149380

Other languages

English (en)

Other versions

CA2149380A1 (fr

Inventor

Ming-Ren Lian

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Sensormatic Electronics Corp

Original Assignee

Sensormatic Electronics Corp

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1994-06-30

Filing date

1995-05-15

Publication date

2005-03-29

1994-06-30 Priority claimed from US08/269,651 external-priority patent/US5469140A/en

1994-08-10 Priority claimed from US08/288,556 external-priority patent/US5495230A/en

1995-05-15 Application filed by Sensormatic Electronics Corp filed Critical Sensormatic Electronics Corp

1995-12-31 Publication of CA2149380A1 publication Critical patent/CA2149380A1/fr

2005-03-29 Application granted granted Critical

2005-03-29 Publication of CA2149380C publication Critical patent/CA2149380C/fr

2015-05-15 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

Links

239000003550 marker Substances 0.000 title claims abstract description 190
230000005415 magnetization Effects 0.000 claims abstract description 47
238000000034 method Methods 0.000 claims description 46
238000012360 testing method Methods 0.000 claims description 26
239000000463 material Substances 0.000 claims description 25
238000005520 cutting process Methods 0.000 claims description 15
238000004519 manufacturing process Methods 0.000 claims description 13
239000000696 magnetic material Substances 0.000 claims description 8
230000005672 electromagnetic field Effects 0.000 claims description 7
230000008859 change Effects 0.000 claims description 6
238000009738 saturating Methods 0.000 claims description 5
238000000137 annealing Methods 0.000 claims description 3
230000009849 deactivation Effects 0.000 description 17
230000004044 response Effects 0.000 description 15
230000008569 process Effects 0.000 description 5
229920006395 saturated elastomer Polymers 0.000 description 5
238000010408 sweeping Methods 0.000 description 5
239000000203 mixture Substances 0.000 description 4
238000007796 conventional method Methods 0.000 description 3
230000008878 coupling Effects 0.000 description 3
238000010168 coupling process Methods 0.000 description 3
238000005859 coupling reaction Methods 0.000 description 3
230000001419 dependent effect Effects 0.000 description 3
229910000697 metglas Inorganic materials 0.000 description 3
238000010420 art technique Methods 0.000 description 2
230000008901 benefit Effects 0.000 description 2
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238000013461 design Methods 0.000 description 2
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230000005284 excitation Effects 0.000 description 2
230000007246 mechanism Effects 0.000 description 2
230000004048 modification Effects 0.000 description 2
238000012986 modification Methods 0.000 description 2
230000010355 oscillation Effects 0.000 description 2
230000001360 synchronised effect Effects 0.000 description 2
240000007594 Oryza sativa Species 0.000 description 1
235000007164 Oryza sativa Nutrition 0.000 description 1
229910000831 Steel Inorganic materials 0.000 description 1
230000001154 acute effect Effects 0.000 description 1
230000002411 adverse Effects 0.000 description 1
238000013459 approach Methods 0.000 description 1
238000005266 casting Methods 0.000 description 1
230000003247 decreasing effect Effects 0.000 description 1
238000001514 detection method Methods 0.000 description 1
238000010586 diagram Methods 0.000 description 1
230000004907 flux Effects 0.000 description 1
230000002401 inhibitory effect Effects 0.000 description 1
230000000670 limiting effect Effects 0.000 description 1
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238000012545 processing Methods 0.000 description 1
230000002829 reductive effect Effects 0.000 description 1
230000002441 reversible effect Effects 0.000 description 1
235000009566 rice Nutrition 0.000 description 1
125000006850 spacer group Chemical group 0.000 description 1
239000010959 steel Substances 0.000 description 1

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Burglar Alarm Systems (AREA)

CA 2149380 1994-06-30 1995-05-15 Marqueur a frequence de resonance accordable pour la surveillance magnetomecanique d'articles Expired - Fee Related CA2149380C (fr)

Applications Claiming Priority (4)

Application Number	Priority Date	Filing Date	Title
US08/269,651		1994-06-30
US08/269,651 US5469140A (en)	1994-06-30	1994-06-30	Transverse magnetic field annealed amorphous magnetomechanical elements for use in electronic article surveillance system and method of making same
US08/288,556		1994-08-10
US08/288,556 US5495230A (en)	1994-06-30	1994-08-10	Magnetomechanical article surveillance marker with a tunable resonant frequency

Publications (2)

Publication Number	Publication Date
CA2149380A1 CA2149380A1 (fr)	1995-12-31
CA2149380C true CA2149380C (fr)	2005-03-29

Family

ID=26953818

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA 2149380 Expired - Fee Related CA2149380C (fr)	1994-06-30	1995-05-15	Marqueur a frequence de resonance accordable pour la surveillance magnetomecanique d'articles

Country Status (1)

Country	Link
CA (1)	CA2149380C (fr)

1995
- 1995-05-15 CA CA 2149380 patent/CA2149380C/fr not_active Expired - Fee Related

Also Published As

Publication number	Publication date
CA2149380A1 (fr)	1995-12-31

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Legal Events

Date	Code	Title	Description
2002-05-13	EEER	Examination request
2010-05-17	MKLA	Lapsed