Appeal No. 2005-1571 4
Application No. 10/263,275
hole two different transformer stud sizes” (column 1, lines 6
through 9). The connector 10, conventionally made of aluminum,
includes an upper tier portion 14, a lower tier portion 15,
horizontal port openings 17-20, 22 and 23 for receiving
conductors, tapped holes 26-29, 32 and 33 intersecting respective
port openings for receiving jam screws to clamp the conductors in
place, a blind hole 38 for slip-fit connection to the stud 11 of
a transformer 12, and tapped holes 50 and 51 intersecting the
blind hole for receiving jam screws 52 and 53 to clamp the stud
within the blind hole. Noting that transformer studs typically
come in two sizes, Ashcraft provides the blind hole 38 “with
circumferential arc recesses which are sized and threaded to
match the threads on the two different size studs” (Abstract).
In this regard, Ashcraft teaches that
the hole 38 is formed by a primary, secondary and
tertiary drilling step on three different centers shown
at 40, 41 and 42. The centers as seen in FIG. 4 are
vertically aligned and yet spaced. The drill or
diameter on each center also varies with the diameter
on the upper center 40 being the largest. The
intermediate center 41 has an intermediate diameter,
and the bottom or lower center 42 has the smallest
diameter.
Typically, stud sizes may be either 5/8" or 1" and
the intermediate and smaller lower diameter are
designed to accommodate these stud sizes. . . . The
largest arc shown at the top at 45 forms the majority
of the wall of the hole and is unthreaded. The
intermediate diameter forms two smaller circumference
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Last modified: November 3, 2007