Elevator call logic, the old OTIS system

Explained - how a Otis Elevator call system works. Easy with a computer, but NOT when you're using a 1970s relay system!
SEE PART 2 here:
   • DUPLEX elevator call logic - how does...  
TO SEE OTIS MACHINERY IN ACTION, this video has it all: (and took 2 MONTHS to edit!!)
   • Very detailed OTIS LIFT MOTOR ROOM vi...  

Other links features in the video:
EXPRESS LIFTS LOGIC EXPERIMENTS:
   • (3/4) PROBABLY THE BEST 'elevator rel...  
OLD OTIS LIFT MOTOR ROOM:
   • 1971 Otis elevators Part 2 - The moto...  
SCHINDLER HYDRAULIC MOTOR ROOM WITH RELAYS:
   • Old schindler hydraulic lift - i'm lo...  
ALL MECHANICAL BENNIE MOTOR ROOM:
   • All-mechanical BENNIE LIFT MOTOR ROOM...  
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IMPORTANT NOTICE ABOUT SAFETY AND YOUTUBE:
This is a RESPONSIBLE and RESPECTABLE channel.
My channel does not promote or glamourise dangerous activities like lift surfing.
For further info, please see these links:
https://elevatorcommunity.fandom.com/...
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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 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 :)