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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Main Authors | , , |
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Format | Patent |
Language | English French German |
Published |
25.11.2009
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Subjects | |
Online Access | Get full text |
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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. |
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Bibliography: | Application Number: EP19990951603 |