The following order of
assembly is critical to
obtain a good fit of the
parts because the “egg
shell” plastic platform U is
cut from a fluorescent
light ceiling diffuser and is
injection molded to exact
dimensions. (See Figure
7.1.) Cut platform U from
the diffuser stock as 16 x
16 complete squares using sharp flush-cut pliers.
Fabricate the button magnets as shown in Figure 7. 2.
To orient the correct surface of the button magnets
pointing upward, using the bottom of doughnut magnet C,
make sure the button magnets are installed in the cap
plugs so that the top side of each button REPELS the
BOTTOM of magnet C in its mounted orientation.
As shown in Figure 8, drill the base T from pre-cut
hardwood stock. (See the Parts List.)
As shown in Figure 9, slide reducer R on to the
bottom of post I, flange down. Glue post I into the drilled
hole, flush with the bottom of base T. Then slide reducer R
down snuggly on to base T and cement it to T with a
small amount of cement under the flange of R.
Before the glue dries, use a vertical spirit level to make
small adjustments to post I to insure that it is vertical in
two directions. Set it aside to dry in a protected place.
Continuing with Figure 9, insert three wood
stanchions, S, into the corner closed cells of platform U. If
necessary, lightly sand the
stanchions around the top 1/2
inch of their circumferences to
produce a tight but sliding fit.
Bring the top of each stanchion
flush with the top of U. Slide three
reducers, R, on to the three
Slide the entire assembly of
S,U up against post I so that I is
flush with the sides of the open
corner square in platform U.
Visually insure that the perimeter
of platform U is parallel to the
sides of base T. Keep the
stanchions inserted in U, then
carefully lift up each remaining
corner of U and apply ample
wood glue to the bottom of each
stanchion S, reseating the
■ FIGURE 7. 1.
The platform (U).
■ FIGURE 7. 2. Button magnet fabrication using cap plugs.
pushing down on platform U. Set a few books on the
platform to apply pressure, and allow the assembly to dry.
When dry, attach three feet, V1, to base T by drilling
back through the three stanchion holes in the bottom of
■ FIGURE 8. Drilling the base (T).
January 2011 33