EP 0126451 B1 19861112 - TWO-PART, THREE-LEGGED CORE
Title (en)
TWO-PART, THREE-LEGGED CORE
Publication
Application
Priority
DE 3318370 A 19830520
Abstract (en)
[origin: US4594295A] A two-part cut sheet metal lamination element wherein one of the two sheet metal parts 1 comprises two outer legs 3 and a middle leg 4, the other sheet metal part 5 comprises a crosslink, the two outer legs of the first sheet metal part and the crosslink of the second sheet metal part are rigidly attached to each other, and the free end of the middle leg 4 interacts with the crosslink of the second sheet metal part by a short projection 10 which prevents movement of the free end of the middle leg with respect to the corresponding crosslink by an engagement produced when the two sheet metal parts are pressed together, said engagement and immobilization resulting from the punched or stamped configurations of the sheet metal parts. The projection is in the form of a small, narrow projection 10 which may be on the crosslink, and prior to the pressing together of the two sheet metal parts, the projection 10 and the cooperating region 9, 13 of the cooperating region on the middle leg pressed against the projection may or may not have matching configuration and dimensions, so that after the two sheet metal parts are pressed together the middle leg is held securely by means of a press fit or force fit between the projection and cooperating region. A core, e.g., of a transformer or inductor, comprised of such cut sheet metal lamination elements has greatly reduced (mechanical) hum, particularly at relatively high temperatures.
IPC 1-7
IPC 8 full level
H01F 27/245 (2006.01)
CPC (source: EP US)
H01F 27/245 (2013.01 - EP US); Y10T 29/49078 (2015.01 - EP US); Y10T 29/49861 (2015.01 - EP US); Y10T 403/4966 (2015.01 - EP US); Y10T 428/12257 (2015.01 - EP US); Y10T 428/12264 (2015.01 - EP US)
Designated contracting state (EPC)
CH FR GB LI
DOCDB simple family (publication)
EP 0126451 A1 19841128; EP 0126451 B1 19861112; DE 3318370 A1 19841122; DE 3318370 C2 19860206; HU 189893 B 19860828; HU T34848 A 19850428; JP S6063909 A 19850412; US 4594295 A 19860610
DOCDB simple family (application)
EP 84105659 A 19840518; DE 3318370 A 19830520; HU 193584 A 19840518; JP 9891384 A 19840518; US 61185784 A 19840518