Appeal No. 1998-1408 Page 11
Application No. 08/569,529
In turn, Dirks “describes a surface mount transformer
which can be used with automated assembly equipment and which
is cost effective.” Col. 2, ll. 52-54. Specifically, the
reference includes the following disclosure.
The present invention is realized in a specific
illustrative embodiment thereof in which a
configuration for a power transformer comprises a
ferrite core, a molded coil bridge with a plurality
of angular leads extending, and a molded spacer and
coil cross over with a plurality of angular leads
extending which are electrically coupled to the
angular leads of the molded coil bridge and etched
tracings of a PC board. Moreover, the bridge
members are designed to permit precise placement and
separation of windings. Advantageously, the
windings are separated by a dielectric material and
coupled to the angular leads that are designed in a
manner similar to a conventional dual-in-line
package (DIP). In this manner, board mounting
efficiency is substantially increased.
By means of the coupling of the bridge and cross
over spacer leads to the PC board, current is
introduced into the windings. To maximize coupling
efficiency, the surface mount transformer is designed
to parameters which can be tightly controlled and to
provide precise use of leakage inductance. As a
result of the configuration, the windings are
advantageously contained, while allowing the ferrite
core exposure. By means of this exposure, heat
dissipation from the surface transformer is
efficiently maximized. Col. 2, l. 57 - col. 3, l.
13.
We are also persuaded that Dirk’s teachings of providing cost
effectiveness, permitting precise placement and separation of
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