I've always wanted a double headed coin. But instead of being really lucky and finding one, or being really rich and buying one. You can print your own! Yes it looks like a quarter. But, it is bigger then a quarter. It says Liberty, In God we trust, has an S for made in Sweden, and signed by a one Mr. MCW myself. Yeared at 1969. Not as much detail came out as I would like.
A single ball and socket piece. 2 are required to make a single working ball and socket joint. The distance gained by each length is about 1/2" so 18 would give you 9" length which is the average length of a bracelet.
While looking at the Stirling engine design, I wondered why you needed a cooling piston. Room temperature air should be cool enough. That and if you have a pressure release valve you can release the pressure in the cylinder. So this is my test subject. When heat is applied to the base, the air in the cylinders expands. As one cylinder reaches the top of it's cycle, the hot air and pressure is released. causing the other cylinder to have greater pressure and for it to rise. One concern with this is if the air only has one out, eventually you'll run out of air in the cylinders to cause a difference in pressure. So I added 2 small holes on the inverse side of the release holes, so hopefully the cycle will raise the piston enough to reach here, and as the air is escaping the larger hole hopefully it will be drawn into the smaller.
Came out wonderfully in stainless. Hopefully it will still be printable in stainless. For fans of the Die, you can now have a poster of it, a card of it, even a framed print! http://www.redbubble.com/mybubble/art/6653994-2-stainless-and-gold-plated-steampunk-dice/edit I see this has been selling well lately! Please let me know what you think of the dice, and let me know how you found them! Also if you read this you can get the link to 2 packs for a little bit of a discount. Small dice 2 pack http://shpws.me/lUWS Large dice 2 pack http://shpws.me/lUWU and variety pack http://shpws.me/lUWT