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Otis Elevator relay mechanism for stopping the elevator at a specific floor.
Elevator call logic, the old OTIS system
1962 relay logic Otis elevator
Closeup and relay-sequence of an Old OTIS elevator-controller 2
1966 relay-controlled OTIS elevator at the old hospital of Stadthagen
Clip from Understanding Skyscrapers - some old Otis lifts with relays/selectors
OTIS FLOOR SELECTOR movie - A beginners guide to how it works.
Is this Otis Elevator Relay Controlled | Elevator Video
Elevator Control Room from an early 1970's era building
Otis selector elevator controller
Listen to the relay controller - 1968 Otis Botton Drive Elevator
Otis pie plate selector on an express elevator
