Lift Shafts, Mercury Switches and Relays

Подписаться 47 тыс.

Просмотров 8 тыс.

50% 1

An old lift from 1981. In this video we delve deeper into the mechanics of the lift motor room, with synchronised cameras and EVEN MORE interesting footage than Part 1.
To see PART 1 go here:
• Original 1981 Evans li...
..........
/ mrmattandmrchay-110000...
Please give us a 'like', thank you! :)
..........
MERCHANDISE AVAILABLE! Please support our channel by getting Siren and Lift merch from: www.mrmattandmrchay.com
..........
IMPORTANT NOTICE ABOUT SAFETY AND RU-vid:
My channel does not promote or glamourise dangerous activities like lift surfing.
This is a RESPONSIBLE and RESPECTABLE channel.
• Teaching KIDS TO SURF ...
I've seen recent evidence of kids surfing, or attempting to surf lifts which was also shown in THE SUN and THE MIRROR newspapers (click above link, read description).
VERY WORRYING...
• Video
It goes without saying that RU-vid 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 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.
..........
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 make them this way.
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 very much for watching :)

Опубликовано:

11 ноя 2021

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 52

@Richardincancale 2 года назад

It was a beautifully produced video - especially liked the glowing ‘lights’ signaling the different relay functions and so on! Well done!!

@mrmattandmrchay 2 года назад

Thanks Richard, glad you liked it.

@roots7655 Год назад

There’s just something so satisfying about all those relay sounds and the whirring

@RODALCO2007 Год назад

Excellent video, very well executed with the indicator lights in your editing software.

@Lift.Tracker 2 года назад

Very enjoyable to watch! It seems quite rare to find an old lift with only 2 floors. Usually it would be stairs only if it were any less than 3 floors or so. This must’ve been the beginning of low rise lift installations I suppose. That ‘home made’ control switch was strange to see lol! Would that have been a replacement for the original one which may have broke, or an addition? Why can’t you just press the relays as you usually would? That door motor looks awesome! The door motors are actually one of my favourite parts to an old lift. Every manufacturer having their own way of doing it, they’re great to see in operation. The doors motors on modern lifts are so compact that you can’t even see them anymore. The mercury switch is quite interesting. They’re not something you see very often at all. I’ve actually seen some old electrical sockets which used mercury switches. Flicking the switches would tilt the mercury switch behind it. It was designed to be ‘explosion proof’ for use in environments where flammable gas may be present. I don’t know it these are still around or not, or what the modern equivalent could be. Great video!

@abpsd73 2 года назад

Some of the more modern hazardous location switches I've seen use a magnet and reed switch, since there has been such a drive to eliminate the use of mercury.

@mrmattandmrchay 2 года назад

Good question about the relays. Pressing a low power relay, ok. But it's quite unusual for a lift to use a contactor (with 3-phase mains/415V going across it) as part of a latching relay circuit for the call buttons. Probably I don't get near that, so that's why I built a switch panel instead. Yeah that door operator is quite interesting - that's with the camera and video light poking through a hole in the LMR. I was really glad to see that Mercury switch. It's tiny - looks larger on camera. I was going to unclip it, but then if it broke, well, I decided not to! Interesting about the light switch you mentioned.

@Petertronic 2 года назад

Excellent video as ever - a work of mechanical art!

@mrmattandmrchay 2 года назад

Thanks very much Petertronic

@viv758 2 года назад

Que bonita introducción del vídeo 👍🏻

@mr.struppi9903 2 года назад

Amazing video!

@mrmattandmrchay 2 года назад

Great, thanks and glad you liked it

@Bruno-oc9vo 2 года назад

As usual your videos are perfect, I think I've never seen a mercury switch before , thanks for showing that.

@mrmattandmrchay 2 года назад

Thanks, that's a massive compliment. I always try and put a lot of effort into my videos before uploading them.

@Darknecros7 Год назад

I’ve seen some of these mercury switches inside old thermostats.

@DatamasterCorporation 2 года назад

I love this video and the quality you put into these. VERY refreshing to see all of your videos. I love how you showed the diagram of the relays, and described in detail what they do. I also remember your friend Harry had a video of a really cool Evans hydraulic that is/was in some sort of hospital. Had a really nice motor.

@mrmattandmrchay 2 года назад

Yes, I know Harri and still see him from time to time. I always try to go into detail to make the video more interesting. Thanks for the comment

@Dana_Danarosana 2 года назад

This is incredibly well done!

@mrmattandmrchay 2 года назад

Thanks Dana, took a bit of time, but quality not quantity is my moto! Hopefully I've lived up to it.

@Dana_Danarosana 2 года назад

@@mrmattandmrchay Indeed you have!

@LiftyGamez 2 года назад

Great video! By the way why do so many British lifts have that weird cable attachment clamp on the lift chassis? Most other makes of lifts usually have a circular hook onto the chassis where the cables are attached.

@What_The_Fuck_Did_I_Just_Watch 2 года назад

THIS VIDEO IS FULL OF INTERESTING STUFF

@mrmattandmrchay 2 года назад

Thanks for the comment and glad you found it interesting.

@ZZ9ProductionsOFFICIAL 2 года назад

another amazing video, fascinating seeing how it all works together to make the lift do what it does best, run perfectly, and that trislot motor sounds epic as well :D

@mrmattandmrchay 2 года назад

Thanks ZZ9! Yep, hopefully it'll last for a little longer still.

@brunoais 2 года назад

As usual, superb video. As soon as I knew it came out, I stopped everything to come and watch it! thank you very much for the video!

@mrmattandmrchay 2 года назад

Wow, cool! haha! Glad you enjoyed watching it!

@CJ_7521 Год назад

that switch is used in my schools split ac (Air Conditioner

@ag6371 2 года назад

Quite rare for 1 speed instead of 2

@dykodesigns 2 года назад

The Mercury switch is quite noisy. Is that caused by the transformer? Something in the assembly is resonating, in the closeups you can see something vibrating. The circuit diagrams are printed on that typical photosensitive paper that yellows with age and have a very characteristic smell. The paper is slightly sticky, I know from personal experience with handling old building drawings.

@xxexplosivexxxxexplosivexx8512 2 года назад

Might be from the alternating current passing through the mercury (have seen it before) but could also be something else near it.

@mrmattandmrchay 2 года назад

The mercury moving is quite simply the vibrations coming off of the tilting mechanism. Should be silent, but over the years it's obviously become loose and started moving very sightly, into what it's doing now.

@patrick7447 2 года назад

why is the lift motor at 0:15 not Spinning?

@guineagirl5078 2 года назад

Why are lift shafts scary spooky places 😳 💀?! Why do old lift motors make a loud noise

@mrmattandmrchay 2 года назад

Old lifts, the technology they used didn't have much control of the power input into the motor. Lifts now use a frequency to gradually start up the motor. Old lifts, power is switched on in two stages, both of which make a noise. Stage 1 - 415V though a resistor (whooop), then Stage 2 - 415V straight (sometimes a second 'whooop). Brutal and noisy!

@MiamiMillionaire 2 года назад

👍

@xxexplosivexxxxexplosivexx8512 2 года назад

I recently got my hands on one of these mercury switches. They are quite nice but so dangerous.

@mrmattandmrchay 2 года назад

Yes agreed. Was once told a story about kids holding mercury in school lessons, but must have been a long long time ago before they realised it was dangerous.

@xxexplosivexxxxexplosivexx8512 2 года назад

@@mrmattandmrchay Not really. My parents remember exactly this - holding mercury in school. And they are not even that old, so it was only like 40 - 30 years ago.

@jasons8479 Год назад

What is that continual high pitched chattering sound in the background? It sounds like a wind up toy.

@jasons8479 Год назад

Nevermind... I found it in one of your other videos. Thanks!

@MichalM 2 года назад

That looks like a really easily understandable diagram. I've been shown some wiring diagrams of older lifts, and the diagrams are often faded or incomplete. Good to see them in good condition here. Did you by any chance clean the dirty contact on the up relay before you left, or does the contact itself need replacing?

@mrmattandmrchay 2 года назад

The contact has been replaced already (went back there to film the mercury tilt switch in action). Nah, wouldn't want to start turning things off and adjusting stuff. Circuit diagram is fairly easy to read, and quite interesting.

@passacaglia28 2 года назад

What caused the arcing in the contactors?

@mrmattandmrchay 2 года назад

The contactor finger is not making a solid enough connection. If only a small amount of current is required, you probably wouldn't get the arcing. But this is a LARGE amount of current required by the motor, not enough current can pass through the imperfect connection. Electricity has to jump the gap to run causing the arcing.

@AnishKinnit 2 года назад

That is one good sounding motor

@RediffusionMusic 2 года назад

Does a Trislot ever NOT sound good? 👀 the two speed ones sound even nicer, with a really characteristic “whoooop!” on startup

@mrmattandmrchay 2 года назад

Classic Trislot motor this one! As you both said, great sound!

@SeanBZA 2 года назад

Might be made in 1981, but the design for sure is even older, probably from the 1950's, and based on the "if it ain't broke" philosophy. nice relay, I was wondering about the bell sound, then you explained, though I would have thought that all the phase fail detectors would have been replaced with the more modern types by now, as the Schindler I used to have in the building dated from 1966, and that had very similar relays, but the Schindler phase failure relay was based on RC delays and a sensitive relay. Did have to replace a few of the relays to modern ones, they had no more spare contact blocks for them, so in went the modern ones, exactly the same terminal arrangement, but now fully sealed and not open. Still ran off the 115VAC control supply, though I did cheat a little on the in car indicator lights, and replaced the 24VAC lamps with 36VAC lamps, as those would last forever there, plus I had bought a pack of 10 for use in another piece of Chinesium, that ran the logic off 32VAC, which was a pain getting spare parts for. Eventually I just went and found the transformer has a tapping of 8VAC off the common, so wired all the 24VAC relays to that instead. If it went on long enough the whole lot would have slowly morphed to 24VAC, though there were some counters that I simply fixed as needed, cheap capacitors that failed, easy enough to replace with better ones. Chinese wiring, red, white and green in the cables, where you can have them all being 3 phase and hot, or where the red is ground, and the green line, with the white neutral, or any combination of this. I did remove the one totally useless display, a AC voltmeter, and instead put in it's place a self powered counter, which was needed. The counter came in sleep mode, with the display literally saying SLEEP.

@mrmattandmrchay 2 года назад

That phase loss detector is really noisy! The vibrations have actually carved a wedge into the metal which means it doesn't sit in the same position, it's a little loose and rattles!