Why Did They Stop Making These? [Restoration]
ฝัง
- เผยแพร่เมื่อ 5 มี.ค. 2024
- This 1930s Leland Electric Co. throttle variable speed and direction electric motor is one of the coolest tools I have restored.
The restoration was fairly straight forward, but the mechanics of how this works were the most interesting. I give a quick explanation near the end of the video on how I believe this works, but if you specifically know, please leave a comment below.
The tag was in the worst condition I have ever seen, and I'd like to thank @joshsfick on Instagram for once again helping model the tag digitally so I could laser it out.
The wiring was also a larger than usual issue as there was a lot of deterioration.
I could see many use cases for this type of motor and I really wish they were still made like this today.
I'd like to thank @CRCAutoUS for sponsoring this video. I've switched to a food-grade penetrating oil from them as a more safe alternative, and it as worked just as well as the usual penetrating oils I've used.
You can check out the products from them used in this video in the links below:
www.evapo-rust.com
www.crcindustries.com/evapo-r...
www.crcindustries.com/smartwa...
www.crcindustries.com/qd-174-...
www.crcindustries.com/food-gr...
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![Someone paid an equivalent of $2000 for this in 1914 [Restoration]](http://i.ytimg.com/vi/rw_8FWJuSho/mqdefault.jpg)
![Someone paid an equivalent of $2000 for this in 1914 [Restoration]](/img/tr.png)
![Gizmortiser [Restoration]](http://i.ytimg.com/vi/x66xynjmk9o/mqdefault.jpg)
If I put this up for sale it will be on my website: www.handtoolrescue.com
Farmers market I haven't seen one of those in ages I was a little boy then
There is a better tool for removing the rivet-heads from the name plate; use an old pair of wire cutters/dykes. Use a belt sander to flatten the side of the dykes where the edges meet up; this will allow the blades to slide under the rivet heads without significant marring of the nameplate
I want it!
Now that's what u call a sueyside shifter! :D
I didn't even know this was a thing... I would think that it only gets half the torque as a non reversible motor tho.. but I'm not too sure
I've been doing motor repair professionally for over 35 years.
That "string" is lacing that was doped in-place to keep the winding leads, attached to the commutator segments, from being pulled out of position by centrifugal force. The lacing should have been redone and "doped" (cemented with high temperature motor winding epoxy ). If this motor is used for any length of time it will have a catastrophic failure due to this major oversight.
There is a special tool used for "under cutting" the space between the segments of the commutator. The tool removes a precise amount of the insulating bedding material the segments are embedded in and chamfers the leading and trailing edges of the segments to reduce wear, chatter and arcing of the carbon brushes, a very important step in turning a commutator.
Minimally, these two items should be corrected before this motor is put in service.
Good comment and explanation. I was wondering about the "string" removal.... It was originally there for a reason and removing and not replacing it without understanding it's function is not really a restoration.
I've been in servo motor repair for 24 years. You are exactly right sir.
Ya mota, fix it! (Parody of an old Midas commercial.)
This. Sounds like the Bearings/spindle housing could use a little love as well.
Also needs commutator re soldering. And a warning label to not leave the motor switched on in the neutral position.
Holy Crap! Speed and direction, one lever, no clutch. It's just bloody beautiful and elegant.
Yeah Tesla AC is way to go.... European Tesla vs American Edison, i do not want to be provocative but seeing how many things Americans do wrong way just because, but having positive example in Europe is ridiculous these days.
@@OskarHersch But Edison was European at some point in his history.
@@markrainford1219 Which one ?
@@OskarHersch where did tesla live when he was working on AC ? Nikola Tesla was a Serbian-American inventor, . but keep trying
USA! WHOOT WHOOT!@@DeminicusSCA
As a retired auto mechanic I really appreciated this video. I remember the old days when we actually repaired and reconditioned things like starter motors and alternators, rather than replace them. Thanks for this great video.
Их и сейчас восстанавливают. Но не в вашей стране
They're made so cheaply that you'd be an idiot to try and have it remanned. We don't work on alternators and starters for that reason. Why waste the time waiting for a shop to repair it, only for it to save you like $20?
Electric motors are still very much worth repairing.
Though I am an old lady in my mid-70s by now, these kinds of videos bring back fond memories of being with my dad in his workshop, turning things on the lathe, and so forth. He could fix anything. If he needed a specialized tool he didn't have, he would design and make it. And he was from the generation that only had an 8th grade education!
It makes me happy to see that there are young folks who still embrace these skills instead of just throwing things away. (And yes, at my age, "everyone" else is a youngster! LOL)
bless you RIP your dad
Jeez, I'm not old and I'm 80. :-)
I am 47 and my dad was just like that as well, mechanics or electrical things made no difference.
8th grade education back then isn't what it is today. I've seen educational books from the 1920's. Calculus Made Easy by Silvanus P. Thompson is an example, that was for "5th form boys". Children aren't allowed to be actually educated. Sure, they learn a bunch of nonsense, but they aren't taught actual information and knowledge. It's threatening the stability of our society.
Honey education only goes so far...you have to DO IT to gain experience. Experience always trumps knowledge. Stay blessed milady.
Leland made a lot of specialty motors. Phase shifting, repulsion, induction and wound rotor motors. I love the designs of these machines and now they are quite rare as most have been scrapped or thrown out due to misunderstanding of them. I have a complete selection of them and would love to see them in a good home. I'm a retired Westinghouse motor designer and probably won't be around that long. I have many Leland Dynamotors too!
Commenting to help this post show up.
Westinghouse Electric was an amazing company , as was Westinghouse Air Brake.
@@1978garfieldThe Westinghouse Air Brake was such an important invention, I think about it all the time. How miserable life must've been before it and how wonderful after it. Imagine setting each and every brake on every car manually--so sketchy!
Dad did Westinghouse submarine drives during the war and for years after designed and installed the servos for motor synchronization on big continuous-process lines for Westinghouse customers. He would have loved to see those ingenious Leland units! As a kid it was exciting to see the big machines get tested in East Pittsburgh.
Are you selling them?
I love old motors, especially ones that are unusual and cleverly designed like this.
I'm 29, and my collection of vintage electronics is decent, but sadly lacking in motors. If you're interested in selling them to someone who will appreciate them for many years to come, I am definitely interested. Though I must admit, depending on price I can probably only afford a couple.
Still the only intro I don’t skip.
Same here 😂
First time seeing it. It’s been a while. Lmao. Awesome.
What he said.
Same lol
I notice the garbage has left the cast though. Tisk, always your favourites that leave between seasons...
An old repulsion induction motor! With exterior reversing handle. I had one I would play with, years ago. Repulsion induction motors are known for their torque and that they are reversed by moving their brush cluster. Not seen much today, a personal favorite! Great job!!
Yup! Learned about these in the Navy many (too many) years ago. Notice no external wires to the brushes. In these they are just used to short specific bars of the commutator together. Changing the angle changes which coils of the rotor are shorted in relation to the stator winding.
Thank you so much for the name! I had one of these, quite new in fact (made maybe 15 years ago), on my honey extractor and I was curious how it worked but didn't know what to google.
I guess they are mostly superseded by VFD, i.e. semiconductors replacing ingenious electromechanics as usual.
@@mumiemonstretMy gut tells me that these motors are probably insanely inefficient at anything below max speed. You're essentially making a space heater that can rotate as a byproduct.
@@WyckedSludge That is true, but you save on heating your workshop 😄
I'm sorry to say but this isn't a repulsion start induction motor, much rather a universal motor. This one lacks any mechanism that would disengage the brushes and short out the rotor windings once it reaches near synchronous speed, to which this doesn't seem to 'pull into'. It just seems to spin at an arbitrary speed controlled by the lever.
At 7:46, I was glad to see you add solder to make a better connection, I have seen so many fails, because people thought clamping would work by itself.. Saving all the old wire you could, showed me you respect the the makers.. Loved seeing you didn't modify it with modern bearings, using the old oiler's was a class move.. If you find out what it was made to power, please update it for us.. I love history, especially industrial topics.. IE Motors & Machines..
Thank you for sharing, always a treat to watch..
I have one of these motors on an air compressor and one on an industrial fan. ❤😉
There is a special crimp tool for that type of sleeve and it is not lineman's pliers. Solder is not needed with the proper tool.
I have seen these on old hand-fed letterpress printing machines.
“Reversing the motor adds material back…”
Superb restoration and the exact amount of humor!
"Reversing the motor adds material back…”
This is supposed to be the best comment!
I have one of those machines. I started with a simple 5/16 nut and kept adding material until I had an engine block. Still have the nut.
Going backward reverses the shop's electric meter too!
Reversing the video does so, as well.: )
Lol I did not see that coming.
There's something special about those small oil filler ports with their little lids... love them!
Gits oilers.
@@grntitan1 thank you! I now have the correct word.
Like the sight glass oilers, just more special. Or primer cups on antique cars!
back in the days when items lasted forever as long as you top the oil up. Nowadays we have in brand new appliances DRY sleeve bearings or even better - plastic
On my oldest jeep, the generator and the distributor use the same oilers
That brought back some memories. I was in the Coast Guard and stationed on diesel electric large bout tenders in the great lakes. They used two engines connected to generators that put power to a main motor, connected to the single shaft and prop. Just imagine that motor being 10 feet in diameter and switching back from full forward to full reverse constantly during the day while ice breaking or tending buoys. It's a sight to see. Thanks for the video.
You'd see motors this large in steel mill blooming mills used to reduce an ingot to a billet. Motor never turns more than a few turns before reversing, each pass squeezing the ingot a bit.
Look up Ward-Leonard
I watched this video closely. The amount of work involved in restoring it is absolutely MURDER! The one important step which I believe was skipped is checking the windings with an ohmmeter. I also think a high-voltage should have been applied to test the leakage of the insulation of the windings to the case (and hope and pray and keep fingers crossed) it passes the test! The engineering involved in designing this old motor is awesome.
Your job of cleaning it up with extremely hard work is excellent!
I am 73 year old and this is the first time I have seen a motor like this one. Excellent!!!!!!
I'm 73 years old too and I have never seen one of those motors either. Not even after 20 years as an electronics technician. Bloody hell if it ran on 220VAC I'd buy the damn thing!
I'm 74 and this is the second time I have seen a motor like this one!
My grandfather would be 109 today and he had one of these mounted on his workbench in the basement. I remember fiddling with it as a kid and never knowing what it was for!
I could see that they were shifting the neutral point of the brush rigging (worked on lots of DC equipment), but never seen this on an AC motor. This is one of the most clever ways to make an AC, Variable-speed, reversible motor control. 👏👏👏👏👏👏👏
Me too. Worked in maintenance for many years, saw some old stuff but never one of those.
Been an Electrician all my life and never seen a motor like this. Pretty amazing and way ahead of its time.
I have. This kind of reguation was used on some old trams (tho those were working with DC, not AC).
SEE??!!! I knew it was a time machine control!!
any more on HOW this regulation worked? i dont think it was from adding resistance, but am unsure, I have DC motor application that would be useful for. as resistance doesn't reduce the total power consumed. when the power suplly is a battery total consumption of power becomes critical @@mrkv4k
@@LouAlvis - what you're looking for is the mechanical PWM control. To be honest, they simply aren't worth it for applications of less than 100hp. Might as well buy a solid state PWM controller, or just carry more battery.
@@LouAlvis It's hard to explain it without graphics of some kind but I'll give it a go.
All this is effectively doing is biasing the position of the attractive/repulsive fields of the rotor in relation to the stator. Eventually the field generated by the rotor will match that of the stator at that position and the motor will not move. Continue moving the brushes and the field will move the rotor in the opposite direction.
It doesn't matter if it's a brushed DC motor or a brushed AC/Universal motor this method works the same way.
These repulsion engines are still in production for honey extractors. Brilliant job. Many thanks.
When I went to Electrician's Mate "A" School iin 1978 they taught us about variable-speed, reversing DC motors, but I've never seen one. So cool!
That is not what this is. This is an AC motor, and the brushes are not connected to power, they are connected to each other. (Shorted.) What is going on there is that depending on the position of the brushes, it is either including or excluding shunts (shorted turns) from the area of the rotor that is under the area of magnetic transition, so it is effectively a variable ratio.
im 68 an never seen one. dident no they exsited. snappy an cool. even now bet i could find a use for it.
@@NeilWhelchel Interesting. Makes sense - when they taught us about reversing DC motors, it was all handled in the controller. Variability in speed is simply handled by changing the voltage to the motor (DC). So I was wondering about this one.
The wiggle of the ear proves the commitment of the craftsman to the necessity of the head smash! Another wonderful restoration! Always tell my friends to watch and enjoy your videos!
The Bulgarian judge only gave it a 3.5.
I good...I wasn't the only one that saw that...
Ditto @@haydenc2742
There's just something magical about seeing an old machine get cleaned up and sparked back to life. Thanks for sharing.
White people things are the best. I agree.
"sparked" back to life. I see what you did there.
Takes me back to time spent in a motor rewind shop in the US Navy, when I learned how things worked. I still have and occasionally refer to my copy of Rosenbergs. Very nice restoration, with proper respect for an old tool.
The last few minutes explained the concept WAYYY better than the online course I'm taking at work!
Great job!!
If that explained more to you than the online course you're taking, then your online course was made by a toddler and you just wasted your money. He didn't explain much of anything beyond making an analogy, similar to how one could say voltage is like water pressure and amps are like water volume...it helps you to get your brain in the basic frame of mind needed but teaches you nothing about electrical theory.
😅😅😂😂😂, practical allows for you to work out your own process. Unfortunately practical experience is only after you have ya ticket, but this vid is awesome for history etc
The wind blown noise effect is a nice addition to the soundtrack.
Ha! I don't think it's an effect. Pretty sure that is genuine Saskatchewan winter happening!! Very pleasant.
That is real wind outside! Garage door is very leaky.
'Hoth'
It gave me hiraeth
@@_BangDroid_a Cymro , deep thing hiraeth...
Glad I could have a very small role in bringing this crazy motor back to its former glory!
You are the chosen one!
I appreciate you actually restoring this. Most of these videos they just take it apart, clean it, throw a coat of paint on it and put it back together.
Brilliant! I've never seen one of these, but as soon as I saw the handle I knew exactly what it was. Thanks for a very informative video.
Cleaning the copper from between the bars must have been so fun. Good job!
The asbestos potential makes it more fun...
@HandToolRescue nothing better than asbestos in your projects😍
There are special lathes to clean a rotor. Squash demonstrated one lately.
There's nothing better than freshly grinded asbestos smell in the morning
@@HandToolRescue do you have an armature undercutter? maybe need to go rescue one.
Came for the thumbnail that looked like a baby minigun, stayed for the '90s sitcom intro.
(and then sat through the whole video because it's great)
Thanks!
Same here😂
Same
Oh, y’all new here. Welcome. Stay a while.
Lmfao SAME!!! Saw someone post still the only intro I don’t skip and I was like I have to see this because I can’t stand these elaborate intro’s. He was right. Very well done, funny and clever. Nicely done HTR 👍👍 two thumbs way up (just like they said in the 80’s & 90’s)
I love hearing the snap of the screws hitting a magnetized parts pan!!!!
Thank You for giving me the vibrational strength to keep Truckin' on Brother!!!!
Thank you for the video. I remember my dad taking apart motors to fix them. Such a simple and maintainable motor. Too bad we don’t have similar nowadays.🎉
"reversing the file adds material back" Its these engineering insights I come here for.
Why did I not know this before.
On the down side, my fingernails are now four feet long.
20:47
I have a gold bar I want to try that out on
@@williamoorejr Snap LMAO when he said that
I'm speechless...
Yeah it's like wd40 for squeaky brakes. Some idiot does it and winds up in a school bus . Like through the side.
Love the way your videos move along. I almost never skip ahead. You have found the right balance between showing the essentials, yet not belaboring the point. Also love the comedic touches. Great work.
Agree totally
Yeah, his pacing is really nice. The loud things are also not deafening like some of these restoration channels
Not sure what I just watched. But I can appreciate the love this man has of his skill and craft. It's good to have the resources ($) to be able to do whatever you want, whenever you wish. I am envious. God bless!
I was in the Royal Navy and worked on commutators like this. We called the process skimming and undercutting. Skim on the lathe and undercut the insulators.. We would grind down the offsets on an old hacksaw blade to undercut so that it fit the slots. I enjoy watching your videos!
These sort of motors are apparently called "repulsion motors" ( en.wikipedia.org/wiki/Repulsion_motor ). They seem to be very similar to a normal brushed AC motor (e.g. vacuum cleaner) but are wired up differently. My $0.02 for what it's worth. In a regular AC motor, mains current passes through one stator coil, through the rotor via the brushes, then out through the other stator coil. However, in a repulsion motor, mains is connected only to the stator coils. The brushes are shorted together. Depending on the angle of the brushes relative to the stator, that determines whether it runs fowards, backwards, or is stationary. It's now got me wondering if it would be possible to convert a regular AC motor into a repulsion motor with a bit of tinkering!
same! That would imply giving pseudo VFD capabilities to a motor that couldn't otherwise be outfitted with one.
Thanks for the info, i was wondering what type of motor this is. Never saw one like this
Not the same as vacuum motor
How repulsive! ;)
A lot of modern mains powered drills (at least from Bochs, DeWalt, Hilti and Metabo) have a brusholder that is turned to reverse rotation but the brushes are wired the same way as on models with a reverse switch.
On some of them you can turn it partially and get lower speeds, but that's not the proper way since those have electronic speed controllers and some also 2 speed gearboxes, but I think all of them have an interlock to not allow the trigger to be pulled when the brush holder is in "neutral" or too close and the same way you can't reverse it while you have the trigger pulled
It's so wonderful that you don't add music, just the real sounds.
"cant please all the people all the time" i think covers that one better to have none than possibly drive away some viewers that don't like the music choice works for me
Oh,for heavens sake,I never noticed until you mentioned it,100 percent improvement over the racket
I like that every sound is related to what is happening.
@@jackjones9460that’s generally how sound works.
Gonna Sample them then track em for some Superb Industrial Metal Jam
Awesome Restoration! I've used one of those before at my retirement job to test the alternators I've rebuilt. Your video brings back memories.
I have 3 of these in some form or another from old printing presses 1890’s-1940’s. Love seeing someone restore them.
Reversing the filing machine... That was a gag worthy of This Old Tony.
Without a doubt. This Old Tony is one of my favorite machinists on TH-cam
Addictive filing. Whhat a good concept. It could be a way out when you make something too short. Addictive filing would give you plenty of time to ponder your mistake.
Hands down, the BEST restoration channel on YT. New uploads never fail to make my day just a bit better.
Hats off to you. You are a real "craftsman", not a "Crapsman". I have seen too many nice antiques and nice things ruined by Crapsman. I have never seen a motor like this, very nice. Thanks for saving it from scrap. If I were you, I would add it to your collection.
Thanks for your service. Saving instead of trashing. Awesome little motor.!
Few things in life are more eagerly anticipated than a new HandToolRescue video!!
Ciertamente creo que ya NO existen más estos motores eléctricos. Una verdadera lástima!!. La ingeniería del siglo 20 sigue siendo FANTÁSTICA, simple, efectiva, durable y por demás confiable!!. Que pristina restauración. Felicitaciones señor!! 😊
An absolutely beautiful restoration! My best friend in youth during our high school days was an apprentice at a electrical motor repair shop through the school co-op program. This was in the 1960's and I wouldn't be a bit surprised if he was familiar with these motors! They were definitely quality built and meant to last!
A homerun restoration. Beautiful. You really knocked it (and almost yourself) out of the ballpark. Thank you.
The lighting and composition of the head smash replay is genius
I'd been feeling particularly down and sorry for myself but watching this video took my mind off things. Then at the end "Reversing the file adds material back" you got me.
Thanks for the laugh, and for all the work that goes into these videos. It's appreciated more than you might know.
I love old tools and have a collection which started with my father's 1930's hand tools he actually used. I display them and don't redo them because I feel they've worked hard during their lifetimes and deserve to rest in retirement, and because the look of wear and age means a lot to me. However, I don't object to others repairing and redoing old tools if that's what they want. Having said that, I found this video oddly satisfying. Nice work!
There is a certain simple elegance to this design. Today we do it electronically & think we're so cool!
The sound it makes when you vary the speed is so satisfying!
What a great idea for a motor... it's got that slight tinge of danger even after the (most likely) better than new restoration.
This is the kind of tool you just instinctively know not to turn your back on.
What a great video. Thanks for making it!
Been here sense almost the beginning of the channel... I so enjoy HTR vids. One reason is I get to see something fully restored without having to do any work whats so ever! Still, the most bizarre machine I've ever seen was that Pogo Compactor. Learning to operate that thing without getting killed would be half the fun.
Took me back to Algonquin College, Ottawa, Ontario, Canada, early 1960s. A Mr. Menna, "Electricity/Motors, teacher/docent: "Gentlemen, before "modern generators" using current and voltage sensing relays, a system was used to balance the required current/voltage at city speeds, versus Highway cruising speeds to charge a car's battery. This was known as: "the third brush system" applied to the commutator of a generator." You will probably never encounter this system in your "careers". It is a museum piece, much like the Gramme ring motor."
Being too busy "learning" I never thought about it again, until I saw your restoration. A universal MOTOR with 4 carbon brushes, fixed to a radialy rotatable plate; Eureka! How is this electrical machine wound and wired?
Have you thought to experiment: by mechanically "driving" the rotor and measuring, and plotting the output voltage versus speed? How about using an Ohm, resistance meter, to shed some light on the nature of the windings? Is it simply a 2 pole motor? (by Ocham's razor?)
The fact that the commutator bar looks "normal" i.e. coaxially and straight = same commutating resistance, plus wear and tear pattern in both directions. Similarly for the "straight vanes of the cooling fan.
Would submarines have used these systems as propulsion control in WW1? As generators?
Any info about: the manufacturer, the application of this motor? Power versus speed curve?
De gustibus non disputandum; I would have painted the laminations black; "to enhance the heat dissapation", (if necessary, and contrast to the red, awesome, and yellow of the brass.
Nice job. My respect, Sir.
very interesting and i have been a tool freak for most of my life of 78yrs. but i don't remember seeing one of these as all my motors are one or two speeds. But the main thing here is the absolutely perfect restoration of this motor. Thanks for just doing the work and not chit chatting about it. I'm a new subscriber today and hope to see many more of your creations and vintage tools.
Not gonna lie. I subscribed immediately after watching your intro like 3 years ago and you have failed to disappoint.
Having done work on hydroelectric plants built in the 1900s brings back great memories thanks for sharing Rincon Indian Reservation Valley Center California
Solid construction, long lasting and does its job exceptionally well. The epitome of a greedy manufacturers nightmare.
I love the use of the right angle electrical conduit to make the switch. Great idea. Nice work
That is so cool. I rebuilt 3 of those, one was just about identical without the tags. One of the other two had never been out of a box. And was 100% old new…… cool stuff man👍🏻👍🏻👍🏻🍺 (you just moving the electrical field to reverse it) Great For Old School Lifts. Just hook it up to a reduction motor. And you’ve got some serious power!
the sound of it winding up was so unexpectedly satisfying! I immediately though of the old Time Machine movie or something.. all you needed was an old flap wheel date counter readout in the background.
I love these old tools, I have a Desmond Stephen MFG Co old Vise from about 100 years again handed down to me, it will last forever.
Finally someone that knows how to join wires and use heat shrink.
Tbf he used an LB as a switch box too. 😂😂😂
@@user-lb8do4ew6k Muahahaha. I needed a small switch box solution that mounted where the original was missing.
@@HandToolRescue I have been warned against soldering crimp connections though. "They" say the solder acts more like a lubricant than a solemn commitment; "they" possibly being old wives though. In a situation where nothing is moving much I don't think it matters.
Nice job as always of course.
@@gshinglesIt's not a common practice but I've seen it in aerospace cables. Makes for a bitch to rework/repair though lol
@@Sun-ut9gr Hey, not saying I don't do it occasionally :)
This technology is still very useful and much more durable in industrial environments than solid state motor controllers. However please be advised: when the motor is going full speed and then is slammed into reverse the motor will create a voltage spike in the line. Any delicate electronic devices sharing the house wiring may be damaged. This principle is refered to as dynamic breaking. (when a running electric motor is disconnected and leads shorted to rapidly stop it). The motor momentarily becomes a generator until the inertia is lost. The leads can also be shorted with a high amperage resistor for less violent breaking. This brushed motor most likely can also run on DC. Great videos. Watching from far far away.
It could probably be converted to run on DC but it did not look like there was any electrical connection to the brushes. the AC in the stator is inducing a current in the rotor windings with the brushes completing the circuit. The alignment of the brush position adjusts the bias of the resulting magnetic field and by extension the speed and direction. The video's analogy of the water wheel is a good enough layman's explanation for what's happening magnetically.
If the stator wiring is laid out how I suspect it is there would not be any significant adjustments needed there. Just connect DC voltage to generate a static magnetic field. The brush rigging however would need to be insulated and have its own power supply added to the brushes. You'd loose the speed variability with moving the lever however as you control the speed by adjusting the voltage. It would make setting neutral a lot easier but moving it around would just make your brushes spark while running.
Honestly this thing is unique enough that I wouldnt even want to try. DC motors have their own design and theres no reason to try and cludge this interesting bit of old tech into being a DC motor that would be inherently temperamental unless you locked down the lever so it couldn't move.
*braking* ;)
Just found this when you think you have seen everything here comes a guy to show you something new. Amazing job
Thanks for sharing
WOW I've got to say I've seen this on a TH-cam short haven't watched this video but I can already say it is gorgeous when you're done. Fantastic!
Yes!!! I’ve been waiting for a new video. Good thing I’m at work and I’m completely willing to stop what I’m doing to sit down and watch this.
I've never seen an electric motor like that before, and I've spent most of my life around tools and equipment from the 10's to the fifties. Awesome! The speed control and reversing works on an electrical timing principle. Moving the handle, and thus the brushes, makes the magnetic interaction of the opposing fields happen sooner and increases the power / rpm. When you move the handle to the middle the opposing forces are directly over each other and nothing happens. Great video!!
These where commonly used on a magneto & generator test bench. Alternators took over and the rest is history th-cam.com/video/Xr-x9qxqiqA/w-d-xo.htmlsi=KRWyJ4WRBBpv5fYd
Wow that was really cool. That's good stuff! That's the kind of thing my Grandpa would know how to do. I wish I had a head start learning stuff like that. Something about restoration warms my heart man. Plus I love the motor! I've never seen one like that. Well done Sir 😊👍
Bent handle was probably an indication of the predominate direction the motor was used. Maybe high speed in one direction, (hard over) and slow speed in the other direction negating going hard over. Good stuff. We were taught shifting the field for speed and direction but never had our hands on it. Thanks.
That pause when you pulled the wire out of the shrink tubing killed me
I had to chuckle about that, but then felt a bit guilty about it.
Very interesting! I've never seen this precise device before. The commutator is just a switch that applies current to successive windings as it rotates. The electromagnetic forces make it turn. However with the extra brushes you can produce two fields that will balance each other at the central position. In theory it will then be drawing a minimal current due only to eddy currents and any losses. It's a very interesting concept. I think that string should have been replaced and lacquered down with a shellac of some kind as it supports the wire ends of the armature (rotor?) coils. Good job and instructional video. I wonder what it was used for?
I loved that the mistakes were left in the video along with the funny parts. Great job restoring.
Now that’s a neat variable speed bi-directional motor! I can see it being used on an electric 4x4 kiddie truck!
*_One of the very best restoration videos I have seen on the internet. And the camera work, and showing detail was absolutely first rate. Excellent video!_*
That's because this is one of the only restoration channels that isn't fake.
Interesting motor; I've never seen, nor heard of such a thing, and I have friends that have come across a lot of unique equipment.
I have been able to weld cast iron with a wire feed welder, and it's held up perfectly. I first discovered it would work, after my dad tipped over our Harbor Freight drill press, and broke the platform crank in two. I made the obligatory double-groove grind for the braze, and thought I'd try out my new wire feed welder, with ER70-S7 wire, just to tack the edges together. It went really nice, so I thought I'd make a base pass.
That went so well, that I welded it completely, and it never broke again, even after scrapping it some 30 years later. That went so well, that I welded a huge crack in my neighbor's 390 Ford exhaust manifolds. He held the rosebud down there to keep it cherry red, and I made pass after pass, filling in the gap. He drove it for several years, and they still weren't leaking 15+ years later, when he sold the truck.
I found cast iron welds at a much lower temperature.
The key to welding cast iron is preheating and post heating don't let it cool fast after welding keep heating it and slowly let it cool that keeps it from cracking.
@@dmclegg66 It was Christmastime, and he drove it home.
Thanks for The info on How this worked,The handel is a SPEED COMTROL and direction control device so NEAT
I just found your channel and found this restoration very interesting. As well as the motor itself. I've never seen one like it. Now I have something else to else to search for. Thanks.
An almost lost art/science. Until my grandpa died at the young age of 58 in 1959, he owned Vandall's armature rewinding shop in Des Moines, IA. I loved being in his shop. Fantastic video!
To put it simply, the electromagnet created in the windings is interacting with the fixed magnets in the casing. As you move the location of the brushes, you're changing the direction and efficiency of push. As you move further away from center, the motor gets more and more efficient- ie: more speed.
The energy is still going through the armature in other positions but- instead of creating torque, it's creating heat- which it likely why they're not made anymore. Too many barn fires.
Great vid ! That fibrous material you removed @3:07 was there a a kind of "wicking" or a tiny "sponge" to help hold the light machine oil that was squirted in from a can into the spring loaded metal cap opposite the bearing to lube it. This was routine maintenance on most quality motors, generators & starters of the era. But the bearings lasted too long that way so they adopted the modern "maintenance free" bearings.
Watching you brass the one end of this motor just reminded me of the first time I brassed something back together. Was the exhaust flange for my 1956 gravely model LI, turned out good for having no idea what I was doing lol.
My cousins grandfather had a similar unit. A cabinet maker he early on embraced power tools and was able to use a reversible motor to operate a number his power heads / tools. Thanks for sharing. Narragansett Bay.
Im studying to be an electrician, we have one of these ate school. They went the way of the dodo when cheap inverters/speed controllers became available, because they have a massive flaw many other motors share; it has brushes, and brushed motors require maintenance much more often than induction motors. Asynchronous motors on the other hand only need yearly lubrication of their bearings for the most part.
What maintenance?
Decades ago, I had a Dremel prcision tool. From times to times I had to check the brushes. Two 5 cents caps, then the spings and brushes at the tips of them. Changing brushes that were about to fail or were gone were like a 5 min operation at most.
Brushed engines have cons but they also have pros.
No mechanic or anything other than a wise old fart but
Just take a good look at anything made in the past 30/40 years and is it still working and/or repairable?
Most of 'todays' goods are made for 'the throwaway society'
Yet 60+ years ago they built machines to last - yes they had to be maintained / serviced but they lasted and repairing them was easy.
40 years ago my dad got 3 non running twintubs (washing machine) from an auction - from those 3 he made one functional....for my first home.
Now...I'm looking for a pre '86 car [pre engine management/pre computer/pre electronics because they're easy to maintain and hardly anything goes wrong except body rot and crashes....nowadays a simple rear end shunt will write a vehicle off.
Not having a go at the younger generations just offering a different reasoned perspective
tragic that serviceable motors with brushes are seen as a flaw, to be replaced by disposal non-serviceable motors.
Induction type squirrel cage motors still need Condition based monitoring. And older plants still use brushed motors because of longevity and ease of service
@@philhunt9297 Truer words were never spoken! Throw away society is spot on. Why build it to last when you can get suckers to buy a new one every 3 years. Good luck finding a washing machine that will last longer than 5 years. God forbid you have to open the tiny flip top lid and add a few drops of oil twice a year! "Yeah too much work, I'll just buy a newer on". God craftsmanship and solid components. That is exactly why he was able to restore this neat little motor. Quality work in the manufacturing process, something lost on todays CEO's. Greed is king.
So glad I found your channel.
I like buying little old widgets on Ebay and restoring them.
This week it was post-war manual hair clippers, which you operate like clippers.
"they don't make 'em like that anymore" Love your intro, reminds me of perfect strangers
I don't think I've ever seen a motor like this. It's brilliant. I do know that with model slot car racing (at least a few years ago before the influx of modern electronics) it was sometimes the practice to (rotationally) alter the position of the brushes slightly, which altered the torque & speed characteristics of the motor, just as is the case with this motor, but instantly achievable with the handle. (The reason for the slot car motor mods being more torque for faster acceleration if the track had lots of bends, or higher top speed if the track had less bends and more or longer straights). (So I believe). I would like one of those motors, it looks very useful, apart from being very neat in itself. Anyway, you've done a really good job on restoring that. I hesitate to think how many hours of work it took.
Oh it’s an early VFD! A single phase one at that! That is sweet!
Please don't divulge how to rewire a house so the power meter runs backwards.
How?
Incredible! Nice Restoration Work! Cool motor!!!
Thank you for sharing🙏👍❤️😊
Beautiful, gotta love the big brass handle.
That is so cool. I want one forward and reverse variable speed. That’s crazy. Thank you.
Years ago, my father had a business rebuilding motors. He would strip them down to bare metal, rewind new coils, refit new bronze bearings and paint the external parts. He used some type of white wool in the oil wells, not cloth. Originally, the winding wire was cotton-covered enamel. When wire insulated with Formvar came out, he switched to that. I remember him cutting Holland cloth for insulating windings. Also, I remember him carefully redoing the armatures, including undercutting the material between the commutator bars.
This was in the 1940s and '50s. It seemed like a lot of work, but I suppose it was feasible for specialized motors at the time.
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Ah. The basics of electro. Beautiful 😍
Amazing to see this insane motor! Lots of love and good wishes from the Indian Himalayas ❤
Knowledge + Tool + Time = Success. Very enjoyable video. Thank you
That does look like a very cool component. And the way the front pulley is partly made of wood is quite fascinating. Great job restoring this.
That is cool!!! I always love watching your restores..Great job!!!
That is the coolest electric motor control i have ever seen !!! In these modern times they use what you VFDs to change ac motor speed and direction. But that there is what you call self contained mechanical vfd driven motor. Very interesting…i wish someone would bring these back into manufacturing..
This is without question the coolest electric motor that I have ever seen. Why on earth is some company out there not making these? I would replace almost every single motor in my shop with one of these if I could get them.
that is so damn cool. for the last 5 years i have wanted to restore my first silicon gun i ever bought about 17 years ago and you my friend just re lit that spark. video coming soon!! thanks for the great contents...subbed