| 摘要 |
Catch system for a gradual bi-directional elevator safety device based on the use of a roller together with hinged rectangular frames on which a friction element is placed, thereby preventing to mark the guiderails during the braking, its operation being such that initially the displacement of the roller produces the braking action on the guide and the catching of the rectangular frame, while subsequently said frame brakes the guiderail, without the participation of the roller ( 9 ) and with the aid of fixed brake shoes placed opposite the hinged rectangular frames.
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