ABANDONED TOWER EXPLORE - Rare ACONIC transistor lift control system from 1970s
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- čas přidán 24. 02. 2023
- A lot of editing went into creating this video, building plans, animations, voice overs and everything timed perfectly to music. It's what you'd expect from the mrmattandmrchay channel - QUALITY NOT QUANTITY.
Pronounced 'Ack-kon-ic', this is a very rare lift control system which was way ahead of it's time in the 1970s.
The mrmattandmrchay channel has teamed up with THELIFTDRAGON to bring you a future video that goes towards explaining how this unique system works.
Manufacturer: SCHLIEREN (later became Schindler)
WANT TO SEE ONE WORKING?? Link below:
• 2 EPIC 70s SCHLIEREN A...
VISIT THELIFTDRAGON HERE:
/ @theliftdragon
Wire-wrapping was used to connect some of the wires at the back of the controller (totally wasn't expecting that!)
Thanks to JONARD TOOLS for allowing me to show the short clip about "what is wire wrapping":
• Jonard Tools Wrap/Stri...
[[[[[[ PART 3 COMING VERY SOON ]]]]]]
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IMPORTANT NOTICE ABOUT SAFETY AND CZcams:
My channel does not promote or glamourise dangerous activities like lift surfing.
Featured in THE SUN and THE MIRROR newspapers:
• Teaching KIDS TO SURF ... (see this KID trying to surf a lift)
VERY WORRYING... 12 year old kids surfing lifts: (link below)
• Random lift adventure 13
mrmattandmrchay is a RESPONSIBLE and RESPECTABLE channel.
It goes without saying that CZcams is a public platform and our channels are popular with kids, and kids are influenced by what they watch. I'd like to think these kids didn't get the idea of surfing lifts from 'my' channel.
A warning in a video DOES NOT exonerate you if harm should come to a kid that was copying something that YOU have portrayed as a fun activity.
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THE MRMATTANDMRCHAY CHANNEL, established 2008:
I'm passionate about uploading quality and interesting videos for YOU, my audience.
What is my channel about? "Old lift machinery made interesting", old air-raid sirens, prehistoric alarm equipment. If "I" don't find it interesting ...then IT DOESN'T GET UPLOADED!
I always spend a lot of time editing my videos with animations, video in-sync with music and voice overs to bring you QUALITY videos to watch.
My moto - "Quality NOT Quantity" - spending a month editing a video is not a rarity!
But without you, I'm nothing here. Thank you so much for watching.
...mrmattandmrchay is me (Matt) and my son Chay.
Thank you again for putting all the effort together to make such a thorough and detailed video on these truly remarkable lifts and the really interesting building in which they're located! I am glad that I was able to help you on the subject of the Aconic controller and it has been a very interesting journey for me as well so far, studying all the old manuals and reading into what the engineers of Schlieren invented here in the 1950s.
I am looking forward to creating part 3 with you and to dive deeper into the subject. Also thank you again for linking my video of the Aconics, timing has been a good coincidence and I'm really glad that I was able to film this extremely rare group of lifts.
The video style, effort that has gone into it, the music, they add so much anemoia type of nostalgia honestly. Something about places which were cared for and then just forgotten for ever, but still exist... broken, but exists.
Precisely the comment that I like, and it makes all the effort and 'attention to detail' worth it! Thanks very much for the nice comment :)
So true!
Ancient Elevator (lift) Kingdom music!
Came for the "Iconic" lift controller, stayed for the Aconic lift controller, said "Alright mate" to the pigeons. 11/10.
I spent a lot of time in (working) elevator rooms a few years ago on a contract job. We audited about 500 elevators throughout a government agency, including some that were over 80 years old. It was really cool to see this and it brings back some memories of opening up a machine room not knowing what decade the actual equipment would be from. In some cases they modernized 1950s elevators to 80s standards and left the old electro-mechanical cabinets and motor-generators behind.
I’m not sure what the maintenance standards are like in the UK but in North America the elevator contractors are focused on new builds and modernization and do not care about service and maintenance contracts. In some cases one technician will be responsible for 150 elevators all over the city, each needing about 5-6 hours a month in code-required service. Well you do the math, they simply aren’t getting the service and not one of those 500 elevators was even close to meeting the A17/B44 code standards for North America. Even though it’s required by law!
Thanks for the videos!
Yes, I had 2 lifts, and both got the correct service, such so that Schindler used the one as part of the annual review from the Swiss parent, as it was a good example of the era lift, and was in good order. Even went and painted the motor room floor, and put all the warning yellow paint on moving parts as well. Had a stack of spares for the unit in the one corner, especially vision panels, with the pig glass wire in them, as those were kind of expensive to order each, but not so when you bought 5 at a time cut to size.
@@SeanBZA it's cool when the old machinery is still being used in the modern era.
Meanwhile in my country some landlords award their lift/elevator maintenance contract to a 3rd party company e.g. 9G that's different from the lift manufacturer, maybe because its cheaper. We also had a shortage of lift technicians to service all my country's lifts maybe because such a career is seen as more menial here
I appreciate the fact that you are making the effort to put it all back together when you could have literally thrown it on the floor (especially since it is already broken and beyond repair).
2 pigeons casually living in the lift motor lol, cool vid honestly. the editing put into this is insane, I know how darn hard it is to edit a video. I like how in depth they go into the lift motors and control boxes, checking every detail, love this kind of content
This must have been cutting edge back in their days. By early 70s transistors proved to be reliable for any application. They struggled a bit with power applications up to late 60s. But for signal control this was the way to go. They can swtich millions of times without deteriorating, and this reduce maintenance. You will still see relays where high voltage or power need to be controlled. But for logic control this was the perfect choice. I imagine that back on this era, we weren't so sure about solid state yet and many other companies just stuck to the safe an proven relay logic. And because all the engeneering was used to it, while moving to solid state would require another different set of skills.
in TheLiftDragon's video where he shows an original Aconic lift, he says the technology appeared in 1959 and was first used publicly in 1961, so it was even more incredible back then.
This channel hits all my love of electromechanical, love the effort that is going into documenting these old lift systems, the attention to technical detail is absolutely outstanding.
I love the quality and effort that is put to your videos. As an engineer myself (but from another field than lifts), I'm the type of person who is always curious and seeking for the answers. I don't need to do that here, because your videos are so detailed that my curiosity is well satisfied. You're doing outstanding job here. Your videos and explanations helped me to overcome my fear of lifts long, long time ago.
And yet again, MrMatt has the answer.
I came across this exact controller in the Agfa Gevaert plant here in Antwerp. I always wondered what it was, because in the 17 years i'm into the buisness this was the only time i've seen this controller. Turns out it's the elusive Aconic. Sadly, this lift was decomissioned in the late '90s. The freight elevator in the same motor room, that probably had the same controller, was modernised by us KONE with an LCE cpu and KDM drive unit.
8:43
“Do not swop”
Love it 😂
Best thing about these videos (besides the absolutely geek-out over obsolete technology) is that all you need is a giant gun center-screen, and it could be real-life Doom.
The music absolutely rocks. :-)
As someone who has been fascinated by machines of all kinds since before I can remember, these elev-excuse me, lift videos are absolutely fascinating. And imagining the history behind the unused buildings as you walk through is kind of fun. Thanks for work you put into making and sharing them.
@@sparklesparklesparkle6318 Ah, I always thought that was their proper name lol!
The copper thieves must take heavy tools with them to take out those field windings. You were lucky that the vandals haven't smashed all those circuit boards up. Beautifully made circuit boards from the 1970's. Thanks for making the video.
Great spot for the final showdown in an action film :)
Every time I see one of your videos... WOW!
It is undoubtedly quality over quantity and I LOVE IT!
Also amazing how you got all of this and put together. Thank you very much for sharing all of this with us!
This is so intriguing... the atmosphere of the video makes it somewhat spooky, but it's interesting to see what's left inside abandoned places like these!
I've personally seen abandoned towers like these in person, but I'd never dare to venture into one, haha
Having found your channel a few weeks ago I am truly hooked! The attention to detail in your explanations and graphics is fascinating and I’m learning a lot already.
You capture the feeling inside these buildings beautifully as well, the music and filming make you feel like you’re in the room with these beautiful machines, their quietness now all that’s left of a once bustling and full of life building. Having never really paid much attention to lifts in the pass I can see the incredible work that goes into them and how they become almost their own being in a building. Keep it up and I can’t wait to see more.
these videos never cease to amaze, the editing is always on another level every time. Never heard of this type of lift logic before seeing this, very much looking forward to seeing more in the next part. Also very curious to see what the inside of those lift cars look like. I hope those pigeons appreciate those old lift motors lol
Glad to see you're still here Matt
I imagine fault tracing and troubleshooting on one of these lifts would have been quite daunting for any technician accustomed to working with relay logic. Having to trace a signal instead of hearing an audible click of a relay and being able to readily see the position and condition of the contacts, even with the tech at the time they could have had a bunch of status LEDs to guide a technician as to what the I/O of a particular cad was doing. Electronic enough to [hopefully] increase reliability but still antiquated to be unable to run self-diagnostics.
Best quality videos ever.
“Videos” is perhaps too basic.
These are more documentaries.
Excellent
Great video. Thank you so much for making these.
Nice work mate. Them old transistorised control must have cost a bomb back in the 70s. Shame to see all the old gear go to ruins like that but just like the rest of the building it has served its purpose. All the best.
It always surprises me where CZcams's recommendations lead me. At first I thought this was just another Lost Places channel, but than I realized it is mainly about lifts. I didn't even know that there were people interested in these enough to make a CZcams channel about them, but in the meantime I found out there seem to be quite a few.
Until now I was actually happy to see a lift being modernized. I don't find old lifts scary, but I didn't like them, being old and run down, rumbling and shaking. while I found newer ones much nicer, moving smoothly from one floor to the next, with modern looking buttons and floor indicators.
However now that I know the elaborate relay technology behind the older lifts build before modern electronics were available, and especially the electromechanical floor selectors, I'm fascinated by them. So much effort and engineering just to move a lift car up and down!
Now I feel said about every one of these replaced by modern technology, despite knowing that they aren't museums pieces, but part of a building's infrastructure, so sooner or later they will have to be modernized or replaced either for economical or for safety reasons.
i cant wait for part three, was worth waiting this long for this video to come. its a big shame how such advanced tech (and rather interesting building) was abandoned after only roughly 25 years.
as for the building itself, its said that the structure itself is in great shape, but due to the sick building syndrome, its not known if it will be demolished or undergo severe rebuilding.
The Aconic controller looks like an Analogue computer to me. Interesting design with those plugin modules. The circuitboards look very artisan, a bit like my father’s hobby electronics projects from the 70’s. Definitely a hand drawn layout.
Very much digital DTL logic there, with likely 24VDC power rails, and a few bias voltages as well for the logic. not all that complex, basically emulating the old relay based controller, just with transistors instead of relays, so that they would last longer, and remain operating with minimal care other than clean air and dusting. Likely faults were still in things like interface, switches and lamps, but the core logic likely was mostly fault free.
Hand drawn like most of them were back then. But I wonder why there is no silkscreen.
Here before your channel blows up.. remember me!
26:00 The swiss engineers of Schindler in the time were very careful with transistors as active electronic parts in a lift control system. They made them changeable like electronic valves.
Engineers of Schlieren not Schindler.
Thanks for the comment and yes, fascinating system and plug-in transistors. I'm not sure that I'd like to fault find this though - imagine randomly swapping out transistor boards until the lift starts working properly again! The know-how must have been very specialised!
That's really cool, The green colour reminds me a lot of the DMS100 telephony switch, which is from mid/late 70's and is more digital. That specific shade must have been in style back then lol.
The video was almost like going on an expedition below the depths of the sea to search the Titanic or something! Nice!!!
Transistors as plug in modules, on the assumption that they, along with diodes, are the more failure prone items, so put them into plug in modules that are mostly identical, so that you can simply keep a half dozen spares in the room, and quickly plug in a replacement, and send the faulty one to be repaired.
Thanks for the comment and yes, fascinating system and plug-in transistors. I'm not sure that I'd like to fault find this though - imagine randomly swapping out transistor boards until the lift starts working properly again! The know-how must have been very specialised! Did you notice that some of them say 'do not swap'? Wonder why, as TheLiftDragon says that the resistor blocks are the same, just newer design.
@@mrmattandmrchay Well, they would have a few variants of the transistor blocks, so fault find to a board area, then swap out the transistor blocks with the spares one at a time, and see if fault clears. No worse than in any industrial control unit, where you isolate to a region of the controller, then put known good boards in, or swap from an identical good unit, and see if the fault moves. Saying do not swap is just those might have been a later modification, with slightly different internal wiring, so you have to swap the transistor block along with the blue block, as the old and new do not intermix, though the interface to the rest of the unit is the same.
Plenty of times i did board swaps in avionics to see what was faulty, then take the now known faulty board, and fix later on after sending the unit back out as serviceable.That way you get the urgent job fixed fast, and can troubleshoot the fault, often a known fault you have marked down for that card, and fix at leisure, being able to do a good job.
10:26 That bird is adorable
For some reason I can picture someone like Dave Jones of the EEVBlog CZcams channel going gaga over this amazing 70s era electronics. Double sided hand-drawn PCBs. 70s era metal can transistors. Funky plug-in modules. Hand-wrapped wiring.
I wonder what sort of capacitors a system like this would be using and how they avoided the "capacitor plague" that 70s era electronics (e.g. old CRT TVs) are known for.
Brilliant thankyou
I like how you paused the music for the pigeon 🐦
You should have visited the tower in the late 2000s it was completely intact and still had lighting and power. The lifts probably still worked back then. There's photos as late as 2009 showing it lit up at night looking just like a normal office building.
incredible lifts!!!!
Fantastic video as always!
Thanks very much Neil! :)
Thankyou
Stayin tuned for part 3!
🤠👍
Good lord! I'm knackered watching you walk up them stairs to the roof
awesome video
Wow. What a professional videos you do. love them an more please
The topology of the transistor blocks and the (apparent) passive component "grid arrays" they plug into (the BLUE blocks) is very reminiscent of the short-lived 1953 NIST "Tinkertoy" project. I suppose this was both a reliability idea (active components are fully modular and can be replaced by yanking a plug module) and a construction flexibility idea (the logic of a "BLUE BOX" segment is defined by the passive component connections within the "grid"). The fact there's a full grid array in there feels like they're presaging the internal construction of FPGAs or "burnable" memory devices.
Never saw anything quite like this in production. The topology seems very "dated", even for the era, but is very beefy and beautifully overbuilt. 1960s integrated circuits were a reality, and by the 1970s they were in commercial use in all sorts of higher-end tech. It's a guess, but I can only imagine this was a move to assure the buyers that the system had a lot of redundancy and deep safety factors.
Honestly, if I had been a repair tech back in the day, and I had the drawings, fixing a system like this would have been a dream. Failed resistors were probably pretty uncommon. And if a transistor, or cluster of them, failed or were destroyed, it'd be a fairly simple matter to pull a block, take the thing to a bench, and yank and replace the failed silicon. None of the usual rework tools to desolder and pull parts from a fragile PCB, less risk of damaging a trace or having to put in a shunt wire etc. Takes up more space, but had to be easier to maintain when it went wrong.
Very interesting comment and thank you for that.
Keep up doing these amazing videos!
Thank you very much for the nice comment Luis! :)
@mrmattandmrchay hi Matt how are it's me liam
As a trekkie, them orange doors are so very reminiscent of those used on the sets for TNG, it's be fun to be able to salvage some and dress them up as such, but, it's a niche thing I'm sure and not many people would want to have such things, never mind working out how to remove them safely... :\
That is an incredible looking logic system. As you are looking through those control cabinets I can help but wonder, what was the benefit to such a system in the late 70's? Reprogrammability? Less moving parts? There are so many small components in that system, i have to believe it was a nightmare dealing with just one failing.
Done a good job on posting part 2 on Five Ways Tower good work
Thanks very much!
Hey x I really do enjoy watching your content I don't know why
Superb video, graphics, commentary and music again. I'm qualified in electronics and am intrigued by the blue modules and the transistor packs. Even the numbers on the transistors are not standard. Looking forward to more and will check out the LiftDragon
Thanks very much Petertronic :) appreciate the comment!
Motorola house numbers, though, looking at the case style, it was likely all plain regular 2N2219A and 2N2907A transistors, house coded from the Motorols JAN TX production line, using the transistors that had failed the more rigorous JAN TX elevated temperature cycling, but still passed the more relaxed industrial testing cycle. To pass the JAN TX in the military and aerospace certification you had to have zero failures in a batch of 100k devices, but commercial and industrial you could have up to 10. All passed at room temp, especially in the mid 1970's, where Motorola had dialled in production on those lines to be consistent batch to batch, and could have 99 out of every 100 batches pass the full space certification without issue.
House coding so that the repair centre can only get them from the approved source, not just go out and buy them, but pay the price for the "right" devices. Vendor lock in for sure, and likely they had to send those back for repair to factory, despite them being commercial parts otherwise.
Hell yes!
I'll say more after I watch this video.
I have never seen any thing like the , cooling grid resistor set up. I call it hat because I have no idea what to call the thing that the transistors plug into. Over all I am surprised to see so few capacitors. Such a lovely lay out on boards. I worked with transistor PLC controllers.
Found a german homepage still selling spares for ACONIC Controls.
Hi Felix. Wow! Wonder how much they sell thesedays! Can you post a URL as I'm interesting to take a look, thanks.
I wish you still filmed hand dryers lol especially rare ones as I’ve watched the vortice ones for years
As you already know my father worked for Express until mid 1980's and I can not remember him mentioning this make of lift. Thankfully they remained down south as they look a complete nightmare. Dad was having to learn about electronic control in his last few years and to give him his dues he did it but that lot looked like a road to nowhere. Thankfully most of the machinery was left in the hands of proper engineers. Thank you for another really interesting video.
Cool channel, nice vids, I like to relax and watch your vids.
Now, maybe the 6th lift engine is placed higher and maybe even installed first so this lift could raise all other equipment into place. So no external companies would be needed to get the materials to their position. Also when parts would have been needed to replace, they could do it all internal (except for lift 6 🤓.
For the boards: you should not waggle them out, but pull them straight out, in order to not damage the side sliders.
Like sliding them in: straight, not waggle.
Same for the transistor blocks.
Interesting are the matrix resistor blocks. I am curious what they were used for, since it is plenty of them.
I am used to work with matrix board with diodes.
Good idea of having the steel wires going “around”, also on the bottom of the lift, do there is no need for a compensation chain which makes spooky noises.
AC to DC, yeah, thats what I worked with too, DC motors can be very powerful and easy to regulate. Did they use DC or half DC?
When using half DC (in fact: from AC to DC using only 1 diode) makes the motor even more powerfull.
Many greetings from the Netherlands ❤
Nice video
Gah, scrappers ruin everything! This should be in a museum!
I hope your still making elevator videos. I enjoy them very much.
Yes I am. I have about 5 videos on the go at once, each one has a complicated part which takes a little time to finish. Time that I'm find hard to find! Next video should be up within the next 1-2 weeks.
14:15 What a beauty those hand-drawn circuit boards.
18:08 Some kind of memory, or decision board? Can I recommend bringing BigClive one day?
19:31 Okay. Now I want this panel to hang in my living, replacing a painting I never really liked.
Thanks for the comments. High rise buildings where the lifts are used a lot, normally the lifts are kept up to date. I was very surprised to see these lift still original. They were about 25 years old when the building shut.
Fascinating light bulb panel isn't it! :)
Interesting, many things are written in German (Iam German)
The video is just as interesting as all others and you explain everithing perfect.
19:35 Actually my first thougt was that if i was there i would try that potentiometer and just when i was thinking that you grabbed it.
Keep up making these great videos with incredible quality and knowlege
Greetings from Bavaria (Germany)
(Did i wright everything correct?)
11:00 I think, copper scavengers were already active in the building. The motors are opened and the field coils are missing. Maybe also cables in the building.
Never seen wire wrapping before, that's quite interesting. I'm guessing there were no electrical drawings on the walls? I guess LiftDragon found some!
Presumably the panel with all the bulbs behind it is a floor position display?
Edit: Answered at 22:55!
A very rare system indeed, but I'm not sure how it works. I don't even know what a transistor is, so I suppose I'll start with learning what they do, lol!
Fascinating video, well done! 26:00 I wonder why they use those blue+yellow plug-in modules in that way - I expected them to be different, but visually they look the same with those arrays of transistors, etc. Or perhaps they're wired differently internally as a way of encoding a floor number or somesuch.
Actually it just struck me that some of those transistors are oriented differently. Maybe that is used to represent a binary number?
Thanks
It’s a real shame these lists aren’t still running and after seeing The Lift Dragons video even more so, as the two lifts in his video have motor/gearbox units as normal and possible due to only being 10 stores, these ones in your vid are direct and would have been good to see the speed and control over 20 odd floors.
12:09, on the left corner , i saw it pooping :D
Aw yeah lift time baby!!!!
So, where wondering if you can explain something in term of elevators that was come-on portrayted in animations or games? ive seen that sort of double door type doing some of 2 chime tone, what are they typically based on? that people is taking inspiration from.
I choose analog relay systems over electronic circuit systems anytime, because capacitors always seem to be the weal link as they often fail first! I have heard often enough about mother board failures to convince me that old school is better for dependability!
I fucking love this stuff❤
The field windings were replaced with pigeons, a much cheaper alternative that requires no copper
That control system must have been so expensive and the man hours that went into making it!
Awesome! You should save the parts. I went to San Francisco (south area). I saw the building was demolition down. I entered there and I got the parts Press 2, 1, G, Door closed, Door open and Alarm. And pull "Stop" in the Red button. Great video. Thumbs up! Cheers!
Hi John. I know what you're saying, and all these "one day" will probably end up in land-fill. But on the other hand, I personally look but don't take anything. Being caught taking something out of a building is classed as theft. Providing you do not 'break and enter' (FYI, we walked in through pre-made openings), then doing what we're doing today is not classed as a criminal act. I'm very sure that urban explorers are a constant frustration and time resource for the police to attend to, and really being caught with something taken from the building will be something the police WOULD take action against. So for me - I don't take anything. You'll see an example of this in part 3. Thanks for the comment.
@@mrmattandmrchay Hi Thanks for info me know. im me..🙂
At 10:28 There was a Pigeon Nesting In the Motor Lol. That's just Funny. And The Reason was they didn't really fly away is because they where Harf asleep so They don't Fully Think of What a Threat is. Usually it would fly away but because it was kind of sleeping you did not scare them. But I found it Very cute.
Was the third lift a different size to the other two hence the raised lift machine platform ? if it was a smaller car then the rope suspension center's would be over towards the other lifts and causing the machine to over hang the other two.
The copper thieves had a field day apparently. Must have been like Christmas 😶
Great videos! What happened to part 3?
The Aconic was actually introduced in the 1950s
I don’t think such technology would’ve been possible in the 50s. How do you know?
AD to DC generation is in my world called a Ward Leonard generating set
Should definitely keep it, it's historically significant. The "Get Carter" car park in Gateshead got razed to the ground, an absolute travesty.
I cast videos so on screen links are not visible. Where is this guy's channel? I tried to search and can't find it either
TheLiftDragon as all one word should bring it up.
:-)
CZcams sent me to your videos recently, I love your style and passion for the old tech! Another youtube channel "The Pethericks" is restoring a convent in france that has a derelict but not vandalised lift in it. Might be fun one for you to visit - the lift is featured in their latest video. (not affiliated with them in any way, just thought you might be interested)
Many thanks for your kind comments Chris! I'll check it out later :)
I commented on another post but didn't realize it was 11 years old lol but I'm curious if you have any clacker relay videos
Hi, not sure what you mean by the term "clacker" relays? Do you mean something like this?: czcams.com/video/uK3MzMdkys8/video.html
Amazing that this used to be considered high tech.
Those 3d rat nest module looks like the way Apollo module was built, they was just potted.
👍🙂
it's easy to see why so many buildings have broken lifts. an intermittent problem would be almost impossible to troubleshoot. if you "shotgun" the modules, what about all the backplane contacts?
Can I ask a stupid question? I am not an expert. If your converting from AC to DC can't you use a Voltage regulator? attaching two motors seems a little ridiculous and wasteful to me.
These might have used DC choppers for speed control
I want part 3
I'm wondering if this Aconic system used TTL - transistor-transistor logic - as its stepping stone from fully analogue relay control to full digital programmable logic control?
You're probably spot on Eddie. It's a very interesting concept, but wonder how much of a nightmare it would have been to fault find! Swap this transistor block out, does it work, no, how about this one! I bet there were more logic methods to do this, but it would have required a unique skillset and experience with working with this controller type.
I believe it is RTL. Possibly dtl but I don't see enough diodes. The interesting thing is how remarkably primitive it is given the age. RTL was 60s tech.
I'm not 100% sure, but I think those banks of plug-in transistors may have been forming very early versions of logic gates. So one plug may have been an AND gate, and another an OR gate etc.
Yes, I'm sure you're right there. The resistors cannot really fail, but in case the transistors do they can be unplugged and a new set plugged in. Imagine trying to fault find this..!!
That's what I'm thinking too, it almost looks like it was a matrix of resistors, these would have been used as pull up/pull down for the transistor bases, at least that's my guess. Probably designed in such a way that they were easy to manufacture in grids and just stacked.
👍👍👍👊😎
Just wanted to mention that the “grid” in the blue box with the transistors plugged in ( 15:42 ) looks like some ROM memory (read only memory) but I’m no computer or lift expert so don’t rely on me
The only thing I could see in the blue boxes were resistors. It would have been unwise to connect power directly to a transistor, so each transistor had a resistor in-line. Depending on the function of each transistor and the 'load' it was switching it's voltage to, this would have made the resistors warm, hence the large box with ventilation above and below.
Fascinating system though, and the only part that could really go wrong were the transistors, which were "swap-out-able".
Looking at the state of some of those equipment cabinets. I'm not sure if they're in their current state from vandalism, or if someone was paid to go around with a sledgehammer and "decommission" the electronics/electrical bits when the lifts were taken out of use. Either way, sad.
That’s a thing? They’ll pay people to sledgehammer good equipment? Why??!
If you look at all the dropped traywork etc, looks like the pikeys have been in to steal all the copper.
Hi Matt how you doing mate? and how is Chay? Wow that is a really interesting and weird lift machinery which run the lifts back when they were installed in the late 70s and till closure in 2005 you definitely don't see a lift motor room like that at all today amazing video as always Matt and well edited with the music making it more spooky hope you having a good day :)
Hiya Frosty Gaming, we're great thanks! Chay is nearly 19 and he's working now, has his own car, etc. What are you up to in life now?
That's the great thing about derelict buildings, everything frozen in time. Did you notice the music sync'd with each level going up the stairs? All these clips, think of it as "that's two evening's work", "that must have taken a whole weekend", "that took a week", etc, then you end up at 2 MONTHS work!! The main problem I have is finding enough free time to do it all, but I wouldn't do it any other way!
@@mrmattandmrchay Yeh I did notice the music changing each level going up the stairs very well edited and works great thats nice to hear that Chay is working and has his own car he has grown up soo much not up to much really I do enjoy playing on my video games and going on my gaming pc allot and watching videos on CZcams especially yours Matt trying to look for a job myself though at the moment but from there thats ally im up to in life at the moment having a good time and thats all.
I can't figure out how technically um-educated the people are who rip out flimsy control wiring with value-lowering lamp sockets on them but leave big clunky transformers in the cabinets
Also they go to the effort of taking out the field windings and leave the rotor windings untouched
That looks like it was a very stylish and attractive building when it was in good repair.
Too bad someone can't buy it and renovate it, keeping the exposed brick everywhere and other stylish features.
The lifts/elevators will probably have to be modernized, though. The electronics and motors look beyond repair.
Problem is, it was the design that was the problem. I had someone comment in part 1, about the distance from desks to the windows with little natural light. And bringing natural light into the middle of a building must be an issue. But designers from the 1970s probably didn't realise, but it ended up being classed with "sick building syndrome".
@@mrmattandmrchay Yes, I agree that is a problem. The reason we have so many ugly boxy glass skyscrapers these days is because laws require that nobody sit farther than a certain distance from a window. I guess that's a good thing in some way for people's health and well being, but it makes for some ugly buildings.