Global Patent Index - EP 0184637 A3

EP 0184637 A3 19880323 - PROCESS FOR THE MANUFACTURE OF A MAGNETIC SWITCH ELEMENT WHICH WILL DEMAGNETIZE FAST ALSO IN A SLOWLY CHANGING MAGNETIC FIELD

Title (en)

PROCESS FOR THE MANUFACTURE OF A MAGNETIC SWITCH ELEMENT WHICH WILL DEMAGNETIZE FAST ALSO IN A SLOWLY CHANGING MAGNETIC FIELD

Publication

EP 0184637 A3 19880323 (DE)

Application

EP 85113068 A 19851015

Priority

DE 3440918 A 19841109

Abstract (en)

[origin: EP0184637A2] A process for the manufacture of a magnetic switch element is specified. A fine-crystalline structure is produced by short-term annealing of a cobalt-iron-vanadium alloy at 630 to 900 DEG C, which leads to pulse voltages of over 10 volts when subjected to a slowly changing field under tensional stress in a coil with 1000 windings. This property is reproducible so that inductively operating sensors can be manufactured, for example, for speed transmitters operating down to zero speed.

IPC 1-7

H01F 1/16; C22F 1/00; C22F 1/02

IPC 8 full level

C22F 1/00 (2006.01); C22F 1/02 (2006.01); C22F 1/10 (2006.01); H01F 1/03 (2006.01); H01F 1/16 (2006.01)

CPC (source: EP)

C22F 1/02 (2013.01); C22F 1/10 (2013.01); H01F 1/0304 (2013.01); H01F 1/0306 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT CH DE FR GB IT LI NL SE

DOCDB simple family (publication)

EP 0184637 A2 19860618; EP 0184637 A3 19880323; EP 0184637 B1 19910724; AT E65640 T1 19910815; DE 3440918 A1 19860515; DE 3583589 D1 19910829

DOCDB simple family (application)

EP 85113068 A 19851015; AT 85113068 T 19851015; DE 3440918 A 19841109; DE 3583589 T 19851015