Elevator Music
Ludwig Zeininger

two elevator cars controlling algorithmic music software
-- a device, or group of devices, which serves to control, in a predetermined manner, the apparatus to which it is connected.
-- any type of mechanical lock designed to prevent the opening of a hoistway door from the landing side.
-- a panel containing the car operating controls, such as call register buttons, door open and close, alarm emergency stop and whatever other buttons or key switches are required for operation.
-- an electric device that is designed to interpret input conditions in a prescribed manner and after specified conditions are met, to respond and cause contact operation or create change in associated electric control circuits.

thx: Heinrich Holzer, Peter Rantasa, Ing. Gerhard Wieser