An explanation is
in order, so pardon my drawing skills.
I explained awhile back how the Geo. Stevens coil winder
works... as the main motor rotates the coil
the traverse rod moves back and forth across the coil
bearing the wire guide, which guides the wire
to be wound onto the coil.
The Stevens was originally set up by the original owner
to wind bobbinless pinball machine solenoid coils,
like the one at the
drawing shown on the left. This setup uses a winder
blade mounted to the wire guide
(shown in another photo), which slides over the top of
the coil like a sled as the wire guide moves back
and forth. The coil wire ran through a hole in the
I am converting the Stevens to wind guitar pickup coil
bobbins, which very quickly became a major
The winder blade originally found on the Stevens' wire
guide is 1/4 inch wide, and a humbucker or
P90 pickup's coil bobbin also has a space between the
bobbin top and bottom of 1/4 inch. Therefore,
the coil winder would never move across the bobbin as
it should to properly fill the bobbin,
but instead it laid down the coil wire in a very
narrow line right down the center of the bobbin!
After much research, I found out that winding bobbined
coils like guitar pickups (see the drawing
at the right) were done with a 'winder nozzle' that
fit down in between the coil's bobbin sides and still
moved back and forth to fill up the bobbin.
I had enough problems trying to find the cams and
gears to make the Stevens work...
now *where* was I going to find a winder nozzle
for a 70 year old machine???