"We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology."
|6945363||Method of contactlessly monitoring elevator shaft doors|
A method for monitoring shaft doors of a elevator installation uses at least one contactlessly acting shaft door monitoring sensor to emit a beam of electromagnetic waves, wherein at least during specific detection phases the beam extends over several floors and is ...
|5368131||Powerless emergency elevator|
A powerless emergency elevator includes guide rails (2) erected vertically; an elevator car (6) supported by a flexible rope (4) so as to be movable along the guide rails; a lock mechanism (7) provided on a top of the elevator car and biased in a locking ...
|4130183||Control system for selective positioning of a displaceable device|
A control system is disclosed for selective positioning a displaceable device, in particular the load carrying fork cage of a so-called fork-lift truck, into pre-selected positions or heights. The control system includes spaced apart pairs of associated s...