Formed metal core blocking method

Details Formed metal core blocking method Formed metal core blocking method

1988-10-12

1989-10-24

Echols, P. W.

Metal working

Method of mechanical manufacture

Electrical device making

296021, 29463, H01F 706

Patent

active

048752770

ABSTRACT:
The invention is directed to a formed metal blocking, for mounting within wedge-shaped gaps between coils of a toroidal transformer, including butterfly-shaped top and bottom core blockings. The blockings are formed from identical stampings, each stamping having a pair of U-shaped coil-engaging faces joined along their inner legs by a center web. The stampings are joined back to back and have a number of flanges which are bent over for securing the stampings to one another. The stampings have an apertured tab at the end of the center web used to form a lifting eye for the top blocking. With the bottom blocking, the tabs are folded over for mounting to a base plate. The outer legs of the U-shaped faces are longer than the inner legs and center web to create a gap in the electric path surrounding the core.

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patent: 3504319 (1970-03-01), Leonard
patent: 4297665 (1981-10-01), Paton et al.

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