Material-handling apparatus

Measurement of traction, operation of brake, friction safety gea

Measuring elevator car position using ultrasound

Measuring elevator hoistway position using audible signals

Mechanical and hydraulic interconnection for clustered hydraulic

Mechanical overspeed safety device

Mechanical overspeed safety device

Mechanical overspeed safety device

Mechanical platform closer for cantilever style liftgate

Mechanical safety device for a lift

Mechanical safety unit on spindle-driven lifts

Mechanism for automatically fixing a slide plate of a system for

Mechanism for automatically preventing a motor vehicle from drop

Mechanism for automatically storing swing arms used for apparatu

Mechanism for latchingly connecting telescoping members

Mechanism for preventing a carriage of a system for lifting a ve

Method and apparatus for acceleration and deceleration control o

Method and apparatus for controlling a group of elevators using

Method and apparatus for controlling elevators with double cars

Method and apparatus for effecting group management of elevators