ELECTRONIC ELEVATOR SAFETY SYSTEM

An elevator braking system is described that comprises a controller 14 that includes an accelerometer 50 detecting acceleration of an elevator car and generating an acceleration signal. An over-acceleration detection module 30 compares the acceleration signal to an acceleration threshold and generat...

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Bibliographic Details
Main Authors SIRIGU, GERARD, REBILLARD, PASCAL, RAILLARD, VINCENT
Format Patent
LanguageEnglish
French
German
Published 25.11.2009
Subjects
ELEVATORS
ESCALATORS OR MOVING WALKWAYS
HAULING
HOISTING
LIFTING
PERFORMING OPERATIONS
TRANSPORTING
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Summary:An elevator braking system is described that comprises a controller 14 that includes an accelerometer 50 detecting acceleration of an elevator car and generating an acceleration signal. An over-acceleration detection module 30 compares the acceleration signal to an acceleration threshold and generates an over-acceleration signal. A first switching device 24 interrupts said acceleration output signal in response to said over-acceleration signal. The brake assembly 16 includes a brake linkage 72, 74, 86, 94 being positionable in a first position and a second position; a spring 85 biasing said brake linkage in said second position; a solenoid 20 receiving said output signal and exerting magnetic force on a portion of said brake linkage counteracting said spring and maintaining said brake linkage in said first position; wherein said brake linkage comprises: a rod 86 in contact with said spring; a trigger 72, said solenoid applying magnetic force on said trigger; and a rotatable dog 74 having a first end 78 engaging said trigger and a second end 82 for engaging said rod for preventing movement of said rod when said magnetic force is applied to said trigger.
Bibliography:Application Number: EP19990951603