EP 0143091 A1 19850529 - An induction heater for heating annular articles, particularly roller-bearings.
Title (en)
An induction heater for heating annular articles, particularly roller-bearings.
Title (de)
Induktionsheizgerät für ringförmige Produkte, insbesondere Rollenlager.
Title (fr)
Appareil de chauffage à induction pour chauffer des produits annulaires, en particulier des roulements à rouleaux.
Publication
Application
Priority
SE 8305807 A 19831021
Abstract (en)
The invention relates to an induction heater for heating annular articles, and includes a U-shaped transformer core (1) and a magnetic yoke which can be lifted from the transformer and upon which the article to be heated can be fitted. When heating the article, mains current is supplied to a primary core (2) on the transformer core, via a first switch (4). In accordance with the invention, the switch (4) is connected in parallel with a PTC-resistor (5, or 5 min ) which when the switch (4) is broken, upon completion of the heating period, first conducts the primary current, which gradually decreases to an extremely low value of about 10 mA, due to the heating of the PTC-resistor (5,5 min ), causing demagnetization of the heated article.
IPC 1-7
IPC 8 full level
H01F 13/00 (2006.01); H05B 6/06 (2006.01); H05B 6/10 (2006.01)
CPC (source: EP)
H01F 13/006 (2013.01); H05B 6/06 (2013.01); H05B 6/101 (2013.01)
Citation (search report)
- DE 2812166 A1 19790719 - GREINER ELECTRONIC AG
- US 3845442 A 19741029 - IHAYA O, et al
- US 2942162 A 19600621 - BECKER MAXIMILIAN C
- DE 1097059 B 19610112 - KUGELFISCHER G SCHAEFER & CO
- DE 2914304 A1 19791025 - VERTINA ANSTALT
Designated contracting state (EPC)
DE FR GB NL SE
DOCDB simple family (publication)
EP 0143091 A1 19850529; EP 0143091 B1 19890118; DE 3476314 D1 19890223; SE 439718 B 19850624; SE 8305807 D0 19831021; SE 8305807 L 19850422
DOCDB simple family (application)
EP 84850307 A 19841018; DE 3476314 T 19841018; SE 8305807 A 19831021