Inductor devices – Coil or coil turn supports or spacers – Coil on a preformed support or mount
Reexamination Certificate
2007-05-08
2007-05-08
Mai, Anh (Department: 2832)
Inductor devices
Coil or coil turn supports or spacers
Coil on a preformed support or mount
C336S212000, C336S198000
Reexamination Certificate
active
11211446
ABSTRACT:
A tap-off transformer includes a coil base, a core and wires. The coil base has isolating walls placed outside and using isolating walls to form a first winding slot on a primary side area and a plurality of second winding slots on a secondary side area. Different kinds of wires could be winded inside the first and second winding slots. A wiring start point inside the plurality of second winding slots on the secondary side area is placed on one of the isolating walls, with coils starting from the start point to extend outwards to either sides of the secondary side area and ending at either sides. The coil base has a hollow structure for placing the core to form a transformer structure. The present invention provides isolating walls and a winding design to increase a rated voltage of the transformer and to improve the stability of the transformer.
REFERENCES:
patent: 4774756 (1988-10-01), Dethienne
patent: 4904975 (1990-02-01), Medenbach
patent: 6937129 (2005-08-01), Hsueh et al.
patent: 2003/0038696 (2003-02-01), Chui et al.
patent: 2005/0219029 (2005-10-01), Watanabe et al.
patent: 05304034 (1993-11-01), None
Chang Teng-Kang
Hsu Cheng-Chia
Logan Technology Corp.
Mai Anh
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