Posted by grim (206.162.192.40) on July 27, 2002 at 07:44:04:
The internal mechanism for both the uni-directional wheel and the bi-directinal wheel is depicted
in what everyone seems to call the "wallpaper drawing". I built the one on the top, it seems to be a
transparency because there is no physical way to put 4 throws and their counterweights
on one side (I used a hand-sawed plywood disk.) The counterweights and arms are tied together with a
tie rod pivot-pinned from the counterweight mounting pin out the same distance down the throw arm as
the "pendulums" in the picture. Since the tie rod sweeps the axle area in the center, iI cut a hole in the
axle for movement clearance and put two links on the throw arms "the circular iron on the end of the pendulum
rod". Counterweights were poured from lead, and "mysteriously" came out a 12-1 ratio to the weight of the "weights".
The inverted arm has tremendous kinetic energy when it is grabbed by gravity, and a small part of the excess
helps the lower arm to lift. Watch your fingers around it it will smack you good when it throws. Duct-taped the weights
to the outside and inside (thank you, Red Green!), gave it 1/4 turn, got two full turns out of it. Weights must shift positively,
no "rolling", timing is critical. Works good so far with only two arms and weights not moving in and out, very ebcouraged.
Other two arms go to other side of disk offset 90 degrees to set on opposite side of disk.
Have just figured out how he moved weights positively (hard movement) into proper position. The action takes place all in the
unshaded areas on the drawings as mapped on the prototype edge as the action takes place. Scott, if I get time tonite I will
draw what I have here. Going today (Sat) to get the parts I need for the positive weight moving mechansim, re-do the throw arms
and give it a try. Been real busy lately with business and am just getting back to it. Will send .jpg to you this evening or night.
This thing also rolls itself across ther floor like crazy. Positive weight m-oving mechanism details later as it unfolds.
Regards to all, Grim