Trammel of Archimedes - Do Nothing Machine part 2 // Homemade Science with Bruce Yeany
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- Опубликовано: 13 янв 2017
- Do nothing machine, B.S. grinder, Trammel of Archimedes, they've gone by all sorts of names, when used for drawing it's an ellipsograph. I show it as a lever that switches back and forth from a first class lever to a 2nd class lever. In doing so it is able to trace out ellipses on the handle. It is an interesting piece that shows how circular motion consists of two sinusoidal oscillations. On the practical side it has commonly been used for drawing out ovals for picture frames.
This is odd. Why use a slowmo version of moving the trammel quickly as opposed to just moving it slowly? Is there some some function of it which doesn't scale down like the "balls on various shaped tracks" experiment?
I didn't think of it when I was videotaping
Hah! Fair point, then :)
Thank you for the response. I was just wondering if there's something else going on that I'd missed. Your science of toys videos tend to cover deceptively complex ideas sometimes. This clears it up.
Amanda LaBrock Bruce does.
Malidictus what
Alexander Westphal Bruce uses video tape.
5:00 It's the CBS logo!
You beat me to it ! en.wikipedia.org/wiki/CBS . . . . or you could just start the video at 4:20 for added implications ;)
boflator lol. kmkkkkkkk
No! no! no! it's Exo
LOL!! "2 is better than 1". Great job, my kids love your videos and I learn something from time to time too!
That is the most satisfying thing I've ever seen
glowing knives ??
Ashtonmo_2002 yep
Oh, the irony
i am right with you brother couldnt have said it better
Ashtonmo_2002 Good lord, that's sad...
Here's what I realized at the end of this video...
The real do nothing machine is I, sitting and watching youtube videos when I should be working.
I'm seeing a perfect gift for a 4 year old.
Tomas Horst I'm seeing a brilliant gift for me
Im seeing a brilliant gift
No the girl in your basement is your gift
@@strumblers3701 what does that mean
@@RYB0RB15 idk this it my brothers old account
Zero need to know this stuff. It’s unexplainably soothing to watch.
Why do i find this insanely satisfying. I swear if i get my hands on one of those ill be the do nothing machine spending hours spinning that
if we had a teacher like this in every classroom in the US we would be #1 in the world in education.
but you haven't
Mine was a chemistry teacher in high school. He let us throw sodium metal I the school pool, when the wind was right(blowing towards the admin building) light sulfer stink bombs in the quad, and generally open the lab to any experiment.
He would teach us amazing things and have us the freedom to apply that knowledge however we wanted.
Graduated in the early 90's, and sadly I'm sure that today Mr Wittwer and the rest of the class would be arrested for the "experiments" we were allowed to do.
Finland
Mika Korhonen Finland, Finland, Finland... country where is most like to be!
www.compareyourcountry.org/pisa/country/fin?lg=en Compare to United States. I know, we are small country, but education was our escape route from agrarian society.
Bruce, you inspired me to build one of these! Add some magnets and stick it on either a dry erase or refrigerator. Thank you for what you do.
Hey can I pick your brain on this?
Hey can I pick your brain on this?
this guy's just a plucking genius in his delivery, great entertainment, thoroughly happy to be a part of this quality thread much jokes a ha ha, might have a good dream tonight wondering what funk good this ching is, maybe save world in dream like megahero !
You can tell this guy does this for hours a day. Fun stuff bro.
Would this be good to use in an engine, or am I an idiot?
Max Sainz I think there might already be a function like this in engines, but I'm not entirely sure. It seems to me that it's also similar to how trains move their wheels
Alex Diersing that's interesting. I mean, it seems like it could work.
Do you have any thoughts on a place where an engine needs elliptical motion?
Another question might be: if there is a need, would this way be the easiest and/or best? It seems to me like it's a bit tricky to mount and drive the trammel. Also, the way the shuttles engage and disengage with the tracks strikes me as a potential wear/jam issue which would take some engineering. But if you had an engine which needed elliptical motion, these issues only matter in how they compare to other potential solutions. They're probably all solvable if it's worth the effort.
Yeah, it's not unlike a radial engine. The difference is that in a radial engine, all the conencting rods are articulated so the crankshaft can turn in a circle (not an ellipse, it wouldn't work).
Alex Diersing, RUclips didn't show your comment before, but that's a interesting idea. Applying reciprocating motion to an effectively elliptical crank instead of a circular crank would change the application of forces at different parts of the cycle. I'm not sure if it would be helpful, particularly helpful enough to be worth the additional mechanical complexity, but it's definitely an interesting idea.
It isnt doing nothing. Its a better way to trasfer circles (from motor) to direct pushes.
Mateusz Soszyński it's an ellipse lol
TheFatalTortus 42 just add elipse gear
Mateusz Soszyński no it's is an ellipse. the rotation follows an elliptical orbit not a circular one.
Mateusz Soszyński Just add wire coiled around the pvc and use magnets as the sliders
Mateusz Soszyński And the hand crank moving elliptical would be more ergonomic on the arm.
These are not tools for eliptic drawings. These are anti-stress devices. Really relaxing.
that's my first choice also
When i was younger, my grandfather gave me one and told me it was a game, and that i had to try to get the two moving pieces to hit each other in the middle. I was young and gullible, so I was entertained for quite a while!
Making one of these was one of our assignments in shop class.
very satisfying to just watch and look at.
Michael Bradley true
The sound it makes is reason enough to build a thing like that.
Where can I buy something like this?
try amazon.com or other online ordering sites, im going to check out amazon to see if i can buy this too. pretty sweet mechanics to me
+James Mott I really like the sounds :-)
Alpha Adhito
then u probably like horses ;)
LanYarD
At the shop.
Just make one
This design could be used in some way (literally or more figuratively) to come up with a way to get automated traffic to cross each other while guaranteeing that they will never collide.
TheDisarminghinkle yeaaahh. great idea!!!
TheDisarminghinkle Or to make sure nerds never collide with any women
respect for this teacher who is giving the right knowledge to the next generation
Everyone misses that the far end of the lever defines an ellipse, FINALLY somebody else shows that.
Interesting that you could not find a reference that explained a connection of this to Archimedes. It does look like a "locus of points" problem, which the Ancient Greeks were fond of. An ellipse being the "the locus of points the sum of whose distance from two given points is a constant" is such a problem.
As one person pointed out in your other video on this, there is a 1/4 cut-down version of this. In that, you would have a stick with two nails that rub along the edges of a right-angled wood block, but one end of the stick would extend far beyond the nails. A question Archimedes might have set for himself is "What is the locus of points of the end of the stick." Since analytic geometry did not then exist (and therefore you could not find the equation of the curve), it would have been very difficult to prove the curve was a segment of an ellipse, just the kind of thing Archimedes relished.
There is another layout trick (based on geometry) I have heard about, for marking out an arched doorway. You put a nail on each side of the doorway where the arc is to begin and end. You nail two sticks together so that the notch where the sticks join is at the high point of the arch, while the sticks rest on the nails at the side of the doorway. When you slide the sticks resting on the nails from one side to the other, a pencil in the notch will trace out an arc of a circle. In other words, you can layout a circular arc without ever finding the center of a circle. (In fact the angular part of the circle is twice the angle of the notch, by a theorem in geometry. A 90 degree notch produces 180 degrees of a circle.)
Kenneth Florek I just liked your comment without reading cuz you wrote a lot
Hi Kenneth, more information I didn't know, I'm always appreciate seeing additional explanations or suggestions about any of the ideas that I've posted, this is a learning process for me also. Thanks for your post
Aniruddh Deshpande
OK. Then I will write another long comment.
In the 1800's, when the mechanical age was just beginning to produce wonders like steam engines powering locomotives and the central water system of cities, mathematicians took up a study of what were called "linkages." The idea, I suppose, was that mathematics was going to help inventors understand what mechanical contrivances could do and what was impossible. People are right that this "trammel of Archimedes" looks something like the linkage that hooks up wheels on a locomotive, and the way pistons crank a crankshaft in a gasoline engine. Linkages also form some of the basis of Charles Babbage's Difference Engine and Analytical Engine (now considered the first ancestor of computers as we know them.)
Mathematicians made rapid progress on the subject of linkages. So rapid, in fact, that they determined something which make come as much as surprise to you as it did to me, that you could produce any motion as output from any motion as input. That's right. A linkage can do anything. Sound incredible? Consequently, it is not really a strange, isolated fluke that Charles Babbage, a mathematician, conceived and planned, in complete detail, the first computer.
I have never seen a book on the subject of linkages, and only seen a few curiosities, without any depth, in any book that mentions the subject. It is a dead subject. A problem that has been completely solved! That's boring?
One of the linkages which I have seen mentioned, will generate the integral of a curve when one part of the linkage is moved along a the given curve.
There is a pretty well known linkage, which Presidents going back to Thomas Jefferson used, that enables you to write an exact copy of your document as write the document. Of course if you trace something, it will make an exact copy, and a version of it (a pantograph) will scale the size up or down.
Kenneth Florek, very very interesting; thank you!
Kenneth Florek
Yup like it
well.....that's enough internet for tonight!!!
memorizing!! these kind of mechanisms are way more handy then you'd think! It's these kind of marvels that are used in old-time automation processes!!
it's nice to see that when men get old they still have fun playing with their wood.
Oh wow, I've never seen one with 3 channels. I've never known a name for one either. I saw a 2 channel one when I was pretty young and went home and made one in my Dad's wood shop. He couldn't believe I remembered it that well. Heh Thanks for this video! :-)
...could this be applied to a type of engine?
pistons are the main component of an engine, and the moving blocks shown here would make for such an inefficient engine. it could be an engine, but its not practical considering the efficiency would be terrible
Yes! Circular motion converted into alternating rectilinear motion. Examples are horizontal hack saw or sewing machine. When circular motion is ellipsoidal an eccentric movement is created such as found in punching holes or a stamp mill where an interval is required to exchange stock as in production runs. There are many such examples as used in industry.
Out of curiosity, why do you say it would be inefficient?
You can put knives on it and stab properly aligned people with it.
lueefour Not sure how to word it, but a normal engine has the piston actuate on a tangent reducing any (friction?). This wouldn't operate so efficient because that is not the case here.
I can see little toddlers playing with these machine all day
This is better than many ASMR videos!
we use them in woodworking for drawing ellipses and yeah, this is the best way to do it :D (So, so much about a "do nothing" part.
ivan kalinic You stole my comment! I actually go 1 step further and attach the arm directly to my router to cut the blank for a pattern for glass and to cut the frame. It works great!
3:00
why am i watching this at 3am
elfox it's 6 am for me... god I need a life
Wait... I'm god...
Wow it's exactly 2:51 right now :0
Haha....3:16am for me.
2:43 am here
dear Bruce! - i am indebted to you for showing this so clearly! I can see that this is truly more than just a 'do-nothing' device - it has for eg. 2 phases of accelleration per cycle, and 2 of the opposite! and so i can now see how it can be adapted into a magnetic device! ... .. .
I worked in an art gallery when I was younger. I knew of the push pin technique. The fact that it creates an ellipse is interesting. If the handle was telescopic and the end modified to hold a cutter to score glass or blade to cut mattes this would be a simple but useful tool.
I purchase a machine very similar for this for attaching a wood router to to. I can make very fancy wood frames and oval window cutouts in door panels.
What if this "do nothing" device were one of Archimedes early designs for the eliptical mechanism within his Antikythera device ? It must have taken a few attempts to design a simple , yet effective , mechanism that could predict the eliptical path the moon traverses in order for the Antikythera device to be accurate.
For anyone interested , look up 2000yr old computer , very interesting device ...
Scott Hopgood but the antikytera mechanism was ptolemaic...
Tadeo Tintel Bernal
are you making reference to the Ptolemaic System ( Geocentric model ) or inferring the AM was / is from the Ptolemaic Dynasty ?
Either way , I'm no expert on this subject but the researchers in the following link seem to imply that Archimedes was perhaps the architect of the mechanism ...
(sorry I cant pull up the link) but if you search : 2000yr old computer ; decoding the Antikythera Mechanism ..
Fascinating stuff !
Re the " do nothing machine " , perhaps it served a purpose in the design and construction of the moons eliptical transition within the AM device - just an observation I made based on the fact the researchers are missing certain parts from the AM , which has forced a degree of educated guessing in how the AM operated ..
Scott Hopgood I was referring to the geocentric model.
horses footsteps sound effects in the movies
I would love to back in school again. As an adult in late 30’s, I really miss education.
The X and Y axis one, reminds of a water pump. Pretty cool Video 🤙🏻
this isn't doing nothing, this is a low power heater and an oval compass
It's also a horse sounds simulator
Jindrich Petr Kantor yes!!! especially the 3 axis one
Renovski
It's a piece of equipment that allows you to perform a light exercise that relieves wankers cramp.
Oggy Oggy That's great where can I by at least two...
Oddly satisfying
I like your video....the trammels sound like horse hooves on cobblestones. Neat. Satisfying.
I Always enjoy watching Your Videos.
Now I have another idea to show My Nephew this Thanksgiving!!
Hope You and Yours are doing Great!! Thanks for sharing!!! 🙂
I see a partially closed six tubed exchange system where only three adjacent paths can exchange fluid at any given time -- not a do nothing machine, hah.
If you move the handle with constant speed, you can see that the small wood pieces move in one direction but the speed changes dinamically (acceleration). It is how gravity works. Gravity affects speed of matters so it will produce acceleration. It is why planets dont only move circle, but also oval
Ingenious machines which draw curves with an ever changing radius through vector addition. It is interesting that the centre of the pivoted points seem to describe a perfect circle. It is not exactly a do nothing machine as it is a system where vector addition and subtraction and components of a rotating vector are seen before one's eyes. There is a relation between two phase and three phase motors in those two systems where one uses 90 degrees phase shift while the other 120 degrees phase shifting. Congratulations on your workmanship and the concept itself which says a lot about multi phase systems.
Well done.
Carmel Pule'ρω την τω)πο) θα
The last demonstration where you were rotating two apparatuses simultaneously, would make a great "sound effects" machine for foley artists to represent horses' hooves clopping.
ASMR Surge anyone?
That saiyan guy same
@Derian Setoguchi Is that a channel? I couldn't quite see a chanel with that name
ASMR Surge is a channel where he recreated this machine
that is a toy to play when you're bored with life
there is a certain beauty to the three axis one that I cannot explain
I remember seeing at one time a actual formula for making a string ellipse. If you added the height and width of the desired ellipse you could figure out how long to made the string and how far apart to put the push pins. I haven't been able to find it recently.
Can this be set in a way to make a circle?
promontorium
Yes.
im thinking a new combustion motor
?
Kyle Gardner compressed air motor
Kyle Gardner I was actually thinking the same thing
Wouldn't have many benefits (if any) but it would look really cool
I can see where you're coming from but it wouldn't really have any benefits, generally you want to have the most simple practical design when engineering. It would also be hard to pull off because of how the pistons would move. The way the chambers open up is the problem
Ah meaning it need to be built with two sides ?
Man, I think that thing hypnotized me.
sir, the way you are showing these gid'ding-dongs - DMT souls are showing satisfying things in a scary similar way. saying stuff like: "oh you think that's crazy - have a look at this! and this! and this!" and you are crying your eyes out from visual satisfaction, grace and amazement.
thanks, I still find all the visuals as satisfying as the first day I started
Illuminati??
travis 16 Yes.
Basically
what is This for?
Paulo Costa make a horse clappin noise
Paulo Costa nothing
Drawing ellipses. Did you watch the whole video?
I am 100% going to go buy some wood and some lexan to make one of these. I love stuff like this. It may "do nothing" but it's incredibly interesting and the fact that something like this even works at all with how perfectly it has to be designed and coordinated has always amazed me. One that operates on 3 axis' would be the best conversation piece to have on my coffee table for people to play with and be amazed, then they'd be more amazed that I managed to build it.
That thumb tack hack for Making perfect circles! !!!
These seem very relaxing.
Very enjoyable stuf, thx! Reminds me a bit of the Geneva drive / Maltese cross gear mechanism.
The cross version of the machine struck me as a very nice demonstration of the relationship between cosine and sine!
Fascinating. I hadn't seen a 3 way one before.
André Roubo, a professional woodworker in 18th century France, described using the two-axis version of this for cutting ellipses in marquetry work.
I found a commercial use for this trammel, I will be rich thanks to Archimedes and to Yeany !
Congratulations, glad I could help
Greatest thing I have ever watched!
I love your videos sooo much! I would give anything to have u be my science teacher!
Very useful for carpenters-joiners! For wooden oval frames and tables.
It's not just used to draw ovals for picture frames but is also used to move lathe chucks to cut picture frame ovals.
Looks like a good explanation of a radial engine
only after he showed the ellipse with string and pegs did I understand what he meant by main axis. good video
Wow you are the coolest theacher ive ever seen!
This is like the most satisfying thing ever
this concept has been applied to the design of early rotary engines used in aircraft but in this case there is a ellipse being formed outside the piston cylinder assembly rather than a perfect circle being formed by a larger cocentric array of piston cylinder assemblues
I love your videos. I just discovered you last week with a sand video but you remind me of one of my favorite teachers I used to have.
Thanks Michael, glad you enjoy them
This just helped me solve a problem I was having, thanks.
a great machine for grinding up excess time, i have a similar one!
please remember to dispose of the grinded time material as hazardous waste!
the sound of the wood is totally asmr for me
I'm intrigued...I don't know why...but it is very cool!
These machines are hardly useless. They're space heaters, just much less efficient!
seems like a pretty good way to make a handheld chopper.
If the shuttles were blades and the center you fed through something that needed to be cut lol
Nice rhythm they produce especially when played together ...
New world record for most arms rotating at once starts now.
I like that one from 1990, totally radical dude!! :P :)
This is a beautiful machine.
Its like those flame gulping engines. They're useless but it is SO SATISFYING to watch them run.
I wish a flame gulping engine for many years. never managed to find someone selling one... =/
This would make an interesting engine design
The sounds of those moving around is better than white noise.
It looks like some of the essential work of an internal combustion engine.
this is a very usable machine to aid in the running of an eliptical light ring or mold. very hard to run and I'm sure years to perfect. I've never even seen one. only read about them in very old books.
I could see this being attached to the top of a conical shaped grinding stone with a bowl shaped stone underneath to get a mechanical morter and pestle.
I am very much satisfied with this science 🔬 video
The two trammel version was used in my Dynamics Class to explain the principle of instantaneous centers. I would be interested in seeing that principle applied to the three trammel version.
That are obviously future engine design
This felt good to watch
Really cool vid, would love to build a few of these
what an incredible valve system for aqueduct flow control just my first thought.R.
Absolute brilliant piece of mechanical engineering. Unfortunately couldn't find a use.
It looks addicting to do, great use for exercise actually.
The three-axis kind reminds me of illustrations about how a three-phase AC motor works.