Trapped ring puzzle/trick IMPOSSIBLE (not really)


Problems in life seem to come in one of
two forms: the first case a problem where everything that you need to know in order to solve the problem is right
there in front of you. These types of problems can be solved
easily… if you know the correct algorithm. What I mean by this is that there’s a series of steps that you can take in order to get to the solution. Even if the algorithm is really
complicated, it will still always work… …once you know how to repeat it. The second type of problem might at first seem more difficult, or even impossible. This type of problem requires additional
information, before you can determine the solution’s algorithm. There’s trick to getting this ring off… I’ll let you figure it out, as I show you
how I made this. I’m starting out by making two parts like this- which are just sixty-eight millimeter
circles. This smaller circle has a diameter of forty-eight millimeters. And it’ll be used to determine where the
centers of the posts are. I want to space my three posts out evenly around the circle. The easiest way
to do this is to just use a compass, to divide the circle into six even parts. My goal here is to be extremely precise, so I marked where the holes are going to
be drilled for the posts with this needle tool, which is just a piece of sharpened coat
hanger. Here you can see that the stock is quite a bit thicker than this disk; I want the disc to have a final thickness of
about 5/8 of an inch, so this needs to be planed
down somehow. Random Easter egg: [these captions were actually typed by pocket83] 😉 These three outside holes for the posts
can be drilled as deep as possible, within reason- just so that that little
point on the drill bit doesn’t come through the other side. The two center holes are special: so if
you were suspicious of that center post, you guessed right. One of the two center holes has to be drilled as deep as possible. I’m after a hole that leaves a little more than 1/16″ remaining, and I want the hole to have a
flat bottom. To do this, I sharpened a piece of the
quarter inch rod that I’m using for the posts in to kind of a drill bit. So, first I drilled the bulk of
the hole out with the forstner bit, and then I used the specially bit, to kind of just scrape the bottom of the hole clean. The depth that we drill the second center hole is determined by this magnet. The magnet can be epoxied in now at any
time, And we want it set in, so that it’s sunk in about an eighth of an inch. In the interest of keeping this reasonably
short, I’ll skip the details to the finishing
process, except to say that I used a spray on lacquer. After you’ve applied enough layers of the spray lacquer, you can sand the finish
down flat, and then keep sanding it with increasingly fine
grades of sandpaper, until finally… you buff the finish, and it gives it this nice shine. The next step is to cut these quarter inch steel posts. Their height is pretty much
pre-determined, because we want the puzzle to be about as wide as it is tall. This height seems to be a good size for the puzzle, because the ring can almost stand up, but not quite. …And just in case you’re actually interested in building one of these projects (chuckles), here’s everything that you’ll need to find this part. (scratchy cutting sound) Now it’s time to figure out the length of this center post, so I’m dry fitting it all
together. When the center post is seated all the way
down away from the magnet like this, we want this gap right here to be
about 5/16 of an inch. That distance is just wide enough- for the ring to slip over the top of the post. Now I’m just about ready to put it all together. I expect there to be some squeeze out from the epoxy, so I’m applying some car wax, in the hope that it’ll create (kind of) a barrier that will help to keep
the epoxy from bonding to the finished wood. In order to ensure that I get the
strongest possible bond, I put a few superficial hacksaw cuts on the tops and bottoms of these posts. I’m only doing one half at a time, just so
that I don’t have to rush. but at this point, it’s fairly easy to
remove any squeeze out with a rag that has some car wax on it. Okay, so let’s see this trick actually
work… It takes just a little bit of a tug…
(clicking sound). Well, I really appreciate you watching
this, and I hope you found it interesting. And let me know in the comments just
exactly when it was that you figured out how this worked. Thanks again…
(strange music).

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