公开(公告)号：EP0853810A1

公开(公告)日：1998-07-22

申请号：EP96937657.0

申请日：1996-10-04

Applicant: AlliedSignal Inc.

Inventor： HASEGAWA, Ryusuke

IPC: G01V3 ,  C21D1 ,  C21D6 ,  G01V15 ,  H01F1

CPC classification number: G01V15/00 ,  C21D1/04 ,  C21D6/001 ,  C21D2201/03 ,  H01F1/15341

Abstract: A mechanically resonant marker comprises a strip of magnetic glassy metal alloy that has been annealed in a furnace for a predetermined time at a plurality of temperatures. A first of the temperatures is high enough to relieve quenched-in and post fabrication stresses. The second of the temperatures is near the Curie temperature of the strip. Annealing is carried out in the presence of an external magnetic field applied perpendicular to the strip's length and in the plane of the strip. The second of the temperatures is applied sequentially of the first temperature and is operative to induce magnetic anisotropy along the direction of the magnetic field. Annealing is continuous and the annealing time is determined by the velocity of the strip passing through the annealing furnace.

公开(公告)号：EP0820534A1

公开(公告)日：1998-01-28

申请号：EP96912724.0

申请日：1996-04-12

Applicant: AlliedSignal Inc.

Inventor： HASEGAWA, Ryusuke ,  MARTIS, Ronald

IPC: C22C45 ,  G08B13 ,  H01F1

CPC classification number: G08B13/2408 ,  C22C45/00 ,  G08B13/2442 ,  H01F1/15308 ,  H01F1/15316 ,  H01F1/15341

Abstract: A glassy metal alloy consists essentially of the formula: FeaCobNicMdBeSifCg, where 'M' is at least one member selected form the group consisting of molybdenum, chromium and manganese, 'a-g' are in atom percent, 'a' ranges from about 30 to about 45, 'b' ranges form about 4 to about 40, 'c' ranges from about 5 to about 45, 'd' ranges from about 0 to about 3, 'e' ranges from about 10 to about 25, 'f' ranges from about 0 to about 15 and 'g' ranges from about 0 to about 2. The alloy can be cast by rapid solidification into ribbon, annealed to enhance magnetic properties, and formed into a marker that is especially suited for use in magneto-mechanically actuated articles surveillance systems. Advantageously, the marker is characterised by relatively linear magnetization response in the frequency regime wherein harmonic marker systems operate magnetically. Voltage amplitudes detected from the marker are high, and interference between surveillance systems based on mechanical resonance and harmonic re-radiance is virtually eliminated.

公开(公告)号：EP1183403A2

公开(公告)日：2002-03-06

申请号：EP00923260.4

申请日：2000-04-12

Applicant: AlliedSignal Inc.

Inventor： MARTIS, Ronald, Joseph ,  LIEBERMANN, Howard, Horst ,  HASEGAWA, Ryusuke

IPC: C22C45/00

CPC classification number: H01F1/15308 ,  C22C45/008 ,  H01F1/15316

Abstract: A glassy metal alloy consists essentially of the formula CoaNibFecMdBeSifCg where M is at least one element selected from the group consisting of Cr, Mo, Mn and Nb, 'a-g' are in atom percent and the sum of 'a-g' equals 100, 'a' ranges from about 25 to about 60, 'b' ranges from about 5 to about 45, 'c' ranges from about 6 to about 12, 'd' ranges from about 0 to about 3, 'e' ranges from about 5 to 25, 'f' ranges from about 0 to about 15 and 'g' ranges from about 0 to 6, said alloy having a value of the saturation magnetostriction between -3 ppm and +3 ppm. The alloy can be cast by rapid solidification from the melt into ribbon, sheet or wire form. The alloy exhibits rounded or rectangular or sheared B-H hysteresis behaviors in its as-cast condition. The alloy is further annealed with or without magnetic field at temperatures below said alloy's first crystallization temperature, having rounded or rectangular or sheared or linear B-H hysteresis loops. The alloy is suited for magnetic applications especially at high frequencies.

公开(公告)号：EP0907957A1

公开(公告)日：1999-04-14

申请号：EP97933226.0

申请日：1997-06-26

Applicant: AlliedSignal Inc.

Inventor： HASEGAWA, Ryusuke ,  MARTIS, Ronald

IPC: C22C45 ,  C21D6 ,  G01V3 ,  G01V15 ,  G08B13 ,  H01F1

CPC classification number: G08B13/2408 ,  C22C45/00 ,  G08B13/2442 ,  H01F1/15308 ,  H01F1/15316 ,  H01F1/15341

Abstract: A glassy metal alloy consists essentially of the formula FeaCobNicMdBeSifCg, where 'M' is at least one member selected from the group consisting of molybdenum, chromium and manganese, 'a-g' are in atom percent, 'a' ranges from about 30 to about 45, 'b' ranges from about 8 to about 18, 'c' ranges from about 20 to about 45, 'd' ranges from about 0 to about 3, 'e' ranges from about 12 to about 20, 'f' ranges from about 0 to about 5 and 'g' ranges from about 0 to about 2. The alloy can be cast by rapid solidification into ribbon, cross-field annealed to enhance magnetic properties, and formed into a marker that is especially suited for use in magneto-mechanically actuated article surveillance systems. Advantageously, the marker is characterized by substantially linear magnetization response in the frequency regime wherein harmonic marker systems operate magnetically. Voltage amplitudes detected for the marker are high, and interference between surveillance systems based on mechanical resonance and harmonic re-radiance is virtually eliminated.

公开(公告)号：EP0599963B1

公开(公告)日：1996-03-06

申请号：EP92918160.0

申请日：1992-08-07

Applicant: AlliedSignal Inc.

Inventor： VONHOENE, Robert, Michael ,  HASEGAWA, Ryusuke

IPC: H04B1/59 ,  G08B13/24

CPC classification number: G08B13/2411 ,  G01V15/00 ,  G08B13/2417 ,  G08B13/2442 ,  G08B13/2462 ,  Y10S148/903

Abstract: A process for making a large number of magneto-mechanically resonant markers having distinct resonant characteristics is disclosed. The process comprises modifying at least one surface of a glassy metal alloy strip so as to cause the effective length of the alloy strip to be different from the physical length thereof. Resonant markers comprising alloy strips treated by the process of the present invention display unique and distinguishable resonant characteristics which gives the marker a unique identity. The resonant markers can be used for article surveillance, inventory control and personnel identification.

公开(公告)号：EP0599963A1

公开(公告)日：1994-06-08

申请号：EP92918160.0

申请日：1992-08-07

Applicant: AlliedSignal Inc.

Inventor： VONHOENE, Robert, Michael ,  HASEGAWA, Ryusuke

IPC: C21D1 ,  C22F3 ,  G01V15 ,  G08B13 ,  H01F1 ,  H04B1

CPC classification number: G08B13/2411 ,  G01V15/00 ,  G08B13/2417 ,  G08B13/2442 ,  G08B13/2462 ,  Y10S148/903

Abstract: On décrit un procédé de fabrication en grande quantité de marqueurs à résonance magnéto-mécanique présentant des caractéristiques de résonance distinctes. Le procédé consiste à modifier au moins une surface d'une bandelette d'alliage métallique vitreux de façon à ce que la longueur effective de la bandelette soit différente de sa longueur physique. Les marqueurs à résonance comportant des bandelettes d'alliage traitées selon le procédé de l'invention présentent des caractéristiques de résonance uniques et que l'on peut distinguer, ce qui donne au marqueur une identité unique. Les marqueurs à résonance peuvent être utilisés pour la surveillance d'articles, la gestion de stocks et l'identification de personnes.