Elevator control system safety arrangement

Abstract

Abstract A SAFETY ARRANGEMENT FOR AN ELEVATOR CONTROL SYSTEM WHICH PROVIDES SAFE OPERATION WHILE THE ELEVATOR CAR IS LOCATED AT A LANDING WITH ITS DOOR OPEN. A RELATIVELY LARGE ZONE EXTENDING ON BOTH SIDES OF EACH LANDING IS ESTABLISHED SO THAT THE ELEVATOR CAR AND HOISTWAY DOORS MAY START TO OPEN WHILE THE CAR IS LEVELING INTO REGISTRY WITH ANY LANDING AT WHICH IT IS STOPPING. THIS PERMITS THE DOORS TO BE OPEN A SUBSTANTIAL AMOUNT BY THE TIME THE CAR STOPS AT THE LANDING. A SMALLER ZONE EXTENDING ON BOTH SIDES OF EACH LANDING IS ALSO ESTABLISHED SO THAT UPON ENTERING THIS ZONE THE CAR IS THEREAFTER RESTRICTED IN ITS LEVELING OPERATION TO THIS SMALLER ZONE. FAILURE OF THE CAR ORIGINALLY TO ENTER THE SMALLER ZONE OR AFTER ENTRY TO REMAIN THEREIN AS LONG AS ITS DOORS ARE OPEN RESULTS IN THE CAR BEING PREVENTED FROM SUBSEQUENTLY MAKING A TRIP TO ANOTHER LANDING. IN ADDITION TO SAFEGUARDING AGAINST THIS AND OTHER MISOPERATIONS OF THE ELEVATOR CAR AND ITS CONTROL EQUIPMENT THIS SAFETY ARRANGEMENT ALSO MONITORS ITS OWN OPERATION TO PROTECT AGAINST THE SAFETY EQUIPMENT FAILING AND PRODUCING AN UNSAFE CONDITION.

Inventors

• 👤 Otto Albert Krauer
• 👤 Sheldon Edwin Kornbluth

Bibliographic Details