Method of preparing transformer cores without waste

Details Method of preparing transformer cores without waste Method of preparing transformer cores without waste

1995-03-02

1997-09-30

Echols, P. W.

Metal working

Method of mechanical manufacture

Electrical device making

336234, H01F 304

Patent

active

056715269

ABSTRACT:
Fast and economic process to prepare, without waste, E-I or U-I shaped transformer cores consisting of laminations (1, 2-9,10) that are directly stacked during blanking and are permanently jointed by punched zones (5,5'). Each free end of the E (1) or U (9) shaped laminations has a profile, snap-joint matching the profile (4,4') of the lamination in front of it (2,2) so as to permit their rigid fixing. The laminations are obtained from a steel strip (11) using a discontinuous feed cutting machine from one processing station to the next.

REFERENCES:
patent: 4445104 (1984-04-01), Lin et al.
patent: 4711019 (1987-12-01), Albeck et al.
patent: 4897916 (1990-02-01), Blackburn
patent: 5210930 (1993-05-01), Watabe et al.

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