This Old Tony - 2024-06-07
Good manners and over-center mechanisms are what separates us from the animals. Let's talk way too much about them! ------ Music: Wayne Jones - Mr. Sunny Face / Silent Partner - On Hold
Give a raise to the mysterious guy yelling from the other side of the room, he knew all the answers 😮
He's just there because of the lathe. He watched it next week but realized that yelling at the screen doesn't actually work.
He wasn’t on the other side of the room, he was over-centre. Weren’t you paying attention ??
That's the guy who keeps stealing the script. That's also why he seems to know all the answers.
There must be tri-stable mechanisms out there, too.?
Btw. Brucelee's one-inch punch uses the same over center movement in the moment of impact to create an force spike.:)
@GodzillaGoesGaga Best comment award winner
Drop everything, it’s this old Tony!
YESS!!!
Done and done
And I mean DONE!
I did immediately!😂
Work can wait!
"Jars feel that same exact pain every time you close them"
Tony really keeping up on that mild psychological horror. Never change.
I work in injection molding factory, matter of fact, making fliptop caps. I trust your story of how the bi-stable hinge was discovered. Actually, we had one cap which, if you opened it from another angle than it was intended to, the spring of the hinge snaped. One day, the mold flashed around the hinge and we discovered it made it more resistent. You could open the fliptop cap in a 45 degree angle from the front and the hinge didn't snap. That "failure" was success, and since then we made all cavities with that intentional flash.
PS: I truly thank you for explaining the by-stable mechanism, specially the triangle principles. I work with these for more than 2 years and NOW I GET IT. Thank you ♥
There, you see:
another one sucked into the vortex that is Tony's mind.
We've been waiting....
bi-stable
they probably came from evolutions to compliant mechanisms one of the first compliant mechanisms was basically vicegrips, all of the early designs seem to play with this over center mechanism design, now more complex compliant mechanisms are made like the titanium hinge that don't require a binary mode of operation
@MrMetricSystem binary mode? vs ASCI or text?
its a hinge, not computer programming...
Poly tops ?
Hearing your boy is a preteen has given me another dozen gray hairs. Seems like yesterday he was 3 years old and "helping" build your CNC router.
thats because thats the last time he made a video.
IKR? I don't care if it's cliched. As the youngest of my family, recently watching another one of my nieces graduate high school while memories hit me of my brother bringing her older cousin with him weeks after her birth to pick me up from the same school couldn't be more surreal. It's like, no, you're supposed to stay adorable and small forever. Stop it. And now I've turned into my mom 😂
I know right? I was like 'shit she's a teenager?'
"Building my son his first car"
On the day I shaved off my full on grey beard, just to highlight my still dark (but thin) head hair, This Old Tony guy comes along and shatters my dreams. If I wasn't so well attached, I might have become unhinged.
This is the pinnacle of YouTube content and formatting. It will never get better than this.
That's what they said about the Zeppelin...
@GordieGii and how did that go over? Like a, well, Le(a)d Zeppelin.
yeah youtube just peaked
@ken481959
The lead zeppelin never got off the ground.
But the Hindenburg was really popular. You could say it was on fire.
@GordieGiiand did it? I can't think of anyone who did what zeplin did better...
the forstner bit making the ends round is pretty funny lol
I had to run that back to make sure I wasn’t missing something. 😆
I've been machining for 93 years. This is how I always done it. It's how my daddy did it. It's how my daddy's daddy dit it.
Great to see that technique memorialized here on the world wide web video machine.
@DustysRandom Ill be honest, the only reason i made the comment is because its likely really easy to miss and I was super early haha. Jokes too good to sit idle haha
I thought that was a bit made for wood. Tony is up to his tricks.
@jaredknapp8886 I mean, in all earnest, theres no reason a forstner bit couldnt be used in aluminum. You route aluminum with HSS bits all the time; and drill it all the same. The issue would be torque and it "Grabbing" or potentially work hardening the aluminum, but I think thats purely a feed and speed thing.
I simply love knowing that there is a big enough community out there willing to hear a guy nerd out about over center mechanisms for almost 30 minutes. 😍
Wait! Didn't you read the user agreement?
he is just entertaining the masses with the ideas that rattle most of our brains if you look at things close enough
Its all a ploy by ToT to flesh out the 5mins of explaining the uber cool one piece flip top caps 😜
9:15 "going by the taste: these are M6 threads" 😂 i love those jokes 🤣
26:12
"I don't know who this video is for..." Me.
"...who needed to see it..." Also me.
"...or what they might do with it..." Absolutely nothing, except enjoy it, obviously.
First two spot on but for the third it will come in useful to me sometime probably; if for nothing else then sitting around drinking wine explaining bi-stable states, because of some tangent the conversation has gone off on, and being able to grab the ketchup to explain it.
I don't know anyone else who could make it almost 27 minute video about what's basically a fancy hinge and still manage to make it so incredibly entertaining that I was sitting on the edge of my seat waiting to see the next mechanism.
So true, and well put.
@grumpyone5963 take my upvote sir!
I've said before, I would watch him if he were talking about knitting
Didn't realize I spent 27 minutes enthralled in this until I scrolled down here
Isn't it just an acute triangle with longest side a compression or tension spring?
I chickened out when my kids asked about over-centre mechanisms, and I just gave them the book "Where did over-centre mechanisms come from?".
That must've been a hard decision to make 😅😅😅
You see son, when mama part and daddy part love each other very much, they get... snappy
Followed by the page turner Compliant Mechanisms, by Larry Howell
Trying to figure out how it works on your own in the shower is difficult. You're a good Dad Tony.
I studied the absolute hell out of these mechanisms for a 3d printing project I was working on. Needed a safer mechanism to undo than a nut and bolt in case of emergency for something vaguely life-critical. I didn't have any vocabulary for what I was doing and no internet connection funnily enough. All I had was a sketchbook, a few over center mechanisms and a river that was really useful to stare at.
After a few days of drawing out diagrams on paper, fiddling with different over center mechanisms and staring at my river I finally realized how to design one that would work with my requirements. Understanding hit me like in what felt like divine inspiration and I was riding that high for the rest of the day.
When I saw the title of this video I instantly knew what it was about, despite never hearing the name over center before. All of my fiddling, staring, drawing, thinking came back from that time and it was beautiful. It felt like my brain was finishing every other sentence, up until you got to the shower caps that was crazy.
"And now, we're well on our way to hurting ourselves." 🤣
Finally. Like the first sip of refreshing water after a long dry spell
This video has changed my life and I cant explain it to anyone without sounding like a crazy person.
Congratulations; your "spring" is set, and you are now ready to proceed Over Center...
There is no one else on Gods green earth that could have made over-center explanation this entertaining. Well done, young man.
Technology connections might’ve been able to, but not to the same extent as Tony
25:52 I feel personally attacked.
btw Tony, I started watching your videos as a sophomore in college and I'm 3 years in the industry now. Things I learned from your videos allowed me to effectively lead my senior design project because almost all the other kids had no hands on experience. I really appreciate that you have the interest in doing this. It's probably more valuable than we all realize.
This is the absolute best over-center video I have ever seen!
OK, it is the only over-center video I have seen, but it is still the best.
Thanks, Tony, for another gem!
Steve Mould has one that's mostly about him not knowing what they're called or how widely used they are. The comments took care of that, at least.
And it would still be the best, even if there were a thousand other videos about the topic!
The spring hitting the center screw actually benefits the mechanism. It makes the "sorta-stable" position in the middle virtually impossible.
Also an awesome sound.
Better with a button headed cap screw though :-)
The "sorta-stable" state is known as an "unstable equilibrium" state. Meaning, it is a condition where no net force exists (therefore no motion initiated) but not stable, since a small force will upset the arrangement. Just like how you can balance a rod on its end but it will inevitably fall over and assume a stable equilibrium eventually.
Hysteresis you might call it.
You know, watching this video made me realize that Tony probably has a side gig where he makes video's for science and shop teachers that are too hung over to teach class that day. All they have to do is take attendance, turn off the lights, play the video, and sleep until the bell.
Isn’t that just his normal channel
There's a reason he never gives us face time.
I thought he was trying to break it to us that he was leaving us to go teach grade school. This was an impressively comprehensive and understandable breakdown.
I'm 50 years old but watching that video made me wish we saw stuff like this in school. Thorough explanations, accurate nomenclature, excellent video work, a few jokes to keep you paying attention... TOT is GOAT! (That stands for "greatest of all time", for those of you who are my age or older.)😅
@rm3141593I would buy a DVD set of all basic and intermediate mechanical mechanisms described like this.
I've been thinking about this video all day, and I come to watch it again just to see it's the 1-year anniversary? Weird coincidence I guess
24:48 His name was Ed Furst. He worked for Black Clawson. Also brought you the iconic plastic Ivory Snow bottle and the hole through the neck detergent (and other liquids) bottle handle. The man was a genius.
A machinist named Tony's so neat,
His videos are always a treat.
When he posts something new,
I can't help but woohoo!
His return makes my joy quite complete!
Now a update on project binky and my year is good 😊
Burma Shave
ehhh.....8.5 👍
I always go looking for the limerick in the comment section. I don't even know if you're the one that always does it, or if it's just a ToT Community thing that limerick-capable people take turns, depending on who shows up first.
That didn’t sound gay at all.
that forstner bit gag cracked me up
As a carpenter guy, that definitely threw me off, “is that aluminum? Do they even make metal forstner bits?!”😂
@theothersergethe thing that threw me off was that it didn't look centered. 😂
@Jehty_ right?! 😂
Not going to lie here, I've used Forstner bits on aluminum. Why? I was installing a lock on an aluminum faced, wood core door. The circumferential cutters made very clean edges on the aluminum. Then the remaining wood was easily removed. Door had aluminum on both faces, a small pilot hole aligned for both sides.
@cmmartti ime: slow feed and lots of water to keep it cool and you can get a clean cut
Excellent. If my father had this conversation with me when I was at the age of asking difficult questions, my life would have been different. Thanks Old Tony.
lol, thanks pete!
I knew it - ToT showers with tomato sauce!
These videos are now not just machining, entertainment… they are Art! Library of Congress, you got to add these!
Love the video - information, insight, humor - everything.
The plastic cap hinges are called “living hinges”- (I’m sure Tony will have some fun with this term.)
A factoid I learned in industrial design school is that some plastic living hinges must be flexed (cycled) shortly after being injection molded in order to preserve the flex of the hinge. If this is not done, the hinge becomes brittle, reducing the number of cycles/life.
This was accomplished by ejecting the part against a baffle which caused the part to close.
But, this was 40 years ago, so this process might not be current.
Absolutely LOVE all of Tony’s work!
Thank you!
I didnt know they had a name, now I can talk about them properly, excellent.
Just to mention the effort that videos of this quality must take to make... the wits, the attention to detail, the script... the little silly things on the side. I am always amazed.
ToT is just over center, into one of a kind.
Awesome timing; the other day I was watching a tow truck operator hooking up an F-150 that had dropped its differential in front of my building. When he came to install the pair of tandem trailering wheels around the immobile back wheels of the pickup, I watched him use a long rod to lever the cradle up and over centre and leave the truck locked by gravity into place four inches above the ground and I was struck by just how utterly brilliant yet gloriously simple that invention was. And now here you are, teaching me all about the concept in yet another amazingly well scripted, filmed, edited and executed video. This is exactly the kind of stuff for which YouTube was invented!
100%!
That "un-pause now" is probably your finest gag. So fast, but it's like a Douglas Adams level joke.
On the opening, The dial tone automatically triggered my brain to the lyrics “I need your arms around me I need to feel your touch”
I was just listening to some Cake yesterday and heard that song.
You know it's going to be a great weekend when TOT posts! Don't turn that contraption upside down because all of the gravity will fall out.
Great to see you back 👍
I heard that it was chamfers that separate us from the animals 🙂
That’s what Quinn tells us.
and sometimes fences as well :D
As is tradition
When it comes to chamfers you don’t want to cut corners 😀
@kenharper5755 That's a bit edgy, don't ya think?
Looking at the light switch thinking "what's your over-center secrets" 😂
Probably some sort of cam pushing on some sort of a leaf spring.
Don't let your wife hear you talk like that. She's gonna be jealous, and all...
Technology Connections has a great video on exactly this (and explains why switches are designed to click)
I've dated a couple bistable mechanisms... You're a great dad keeping your kids and all the other kids in the world informed 🙌
The crazy thing is that I was I middle of making a TV mount for the roof of my truck and I wanted it to go up and down by itself basilly with a gas shock to assist it. I was not even looking for designs or anything like that on YouTube when I got the notification of this video and I didn't even understand the title either just hit play because it's Tony!! Watching this has made me think of a perfect layout to build now!! Talk about perfect timming!! I am that person this video was made for!! Thanks Tony!!
26 minutes and I'm still glued to this concept - I'm a maple producer, I make maple syrup in a saphouse in my backyard - and the windows in the cupola up on the roof have to be opened and closed when in use - they are 14ft off the ground, and it took a bit of figuring, but I was able to use an over center mechanism to help them start to move from vertical to nearly horizontal. Great video!
Next time you watch a video of aircraft mechanics "swinging the gear" on a large airplane while it is suspended on jacks, look closely at all the struts, links, hooks and springs that come into view. You will see many over center mechanisms, and they are the devices that securely lock the gear into either the retracted or extended position. Once moved into the over center lock position, the gear will stay in that position even if hydraulic pressure is lost. If hydraulic pressure is lost in flight while the gear is retracted, simple mechanical or pneumatic devices can be actuated to move the up locks over center and allow gravity to do the job of lowering the gear and locking it down with spring-loaded over center mechanisms for a safe landing.
Is it two separate over-center devices, or did some genius come up with an arrangement that had two centers?
@GordieGii Yes and yes. The most common device is two struts, or links, one hinged to some part of the gear or gear door, and the other hinged to structure. The two struts are hinged together at the free ends such that they can fold In one gear position, but form a straight line in the other (either gear extended or gear retracted). One of the struts will have some extension on the end that contacts the other strut just as the joint goes slightly over center, preventing any further movement, while springs prevent any movement back toward center. On several aircraft types, the nose landing gear has struts arranged so that they over center and lock in both the extended and retracted position. Main landing gear usually has an over centering hook mounted on structure that catches a roller bearing attached to the shock strut to hold the gear in the retracted position, while the end-to-end side strut arrangement locks it in the down position.
@Hopeless_and_Forlorn So for the nose gear the short strut rotates around 182 degrees (relative to the medium strut) acting like a toolbox catch in the retracted position and the toggle clamp in the extended position. (1 deg over center at each end) Very cool.
Supposedly 😂. Unless it doesn’t 😮 😢
Being a plastics process technician, I believe you are absolutely correct with your first theory of invention.
Great video Tony, nice to have lunch with you!
The poop jar bit made me actually laugh out loud 😅😅
Man, the engineering behind all these things is amazing! A simple shampoo bottle! Simple, huh?
I mean this with all my heart and soul. My eyes light up like its chirstmas when i see a new video uploaded. Your sense of humor super smartness is one of a kind. I would love to meet you one day. Just to sit down and talk shop. Thank you for everything.
Tony, you are seriously my hero.
thanks rob!!
These educational videos are 10/10. Even if it's a concept you already know, you always pick up something new. 10/10, LOVE THESE.
“Well on our way to really hurting ourselves” had me rolling. Hahahah
It just occurred to me that I haven’t experienced this same cocktail of wonder/awe/laughter since watching James Burke’s Connections series on PBS back in 1978. Thank you, I’ve been missing it
I'm so thrilled about that upcoming video about poop jar!
@medicallyunexplainedsymptoms - 2024-06-08
I'm glad you used a Sharp calculator. Statistically, Blunt calculators cause far more injuries.
@monad_tcp - 2024-06-08
that was a good one
@rexmyers991 - 2024-06-08
That WAS a good one!
@matpearson9711 - 2024-06-09
Look up the statistics on lefties using right-handed calculators it'll send chills down your spine!
@eamonia - 2024-06-10
That's %100 grade A, Tony certified jokeage right there, buddy. I really hope he sees this.
@ronjones4069 - 2024-06-13
Real engineers use an HP calculator with RPN (Reverse Polish Notation).