Climbing device

Claim 1

IN A SAFETY LOCKING DEVICE, THE COMBINATION OF A SLIDING LOCKING CARRIAGE HAVING A SET OF ROLLERS SPACED LONGITUDINALLY AT UPPER AND LOWER ENDS AND COUNTER ROLLERS PARALLEL TO AND COOPERATIVE WITH SAID FIRST SET OF ROLLERS TO RECEIVE IN SLIDING ENGAGEMENT BETWEEN SAID ROLLERS A WIDE FLAT FLANGE OF A SUPPORTING RAIL, WIT SAID FIRST SET OF ROLLERS SLIDABLY ENGAGING THE FLANGE ON AN INNER SURFACE AND THE SECOND SET OF ROLLERS ON AN OUTER OPPOSITE SURACE, THE CLEARANCE BETWEEN BOTH SETS OF ROLLERS CORRESPONDING SUBSTANTIALLY TO THE THICKNESS OF SAID FLANGE FOR EASY SLIDING ROLLING MOVEMENT OF SAID CARRIAGE UPON SAID FLANGE WHEN ENGAGED AND SUPPORTED BY SAID ROLLERS, A PIVOTALLY MOUNTED LOCKING ARM IN SAID CARRIAGE FOR PIVOTAL MOVEMENT IN A PLANE NORMAL TO THE SAID OUTER SURFACE OF SAID FLANGE, SAID ARM HAVING A WIDE SERRATED FLANGE GRIPPING END HAVING A SERIES OF GRIPPING TEETH EXTENDING FROM SIDE TO SIDE THEREOF ECCENTRICALLY DISPOSED WITH RESPECT TO SAID PIVOT FOR ECCENTRIC MOVEMENT OF SAID END, TO GRIPPINGLY ENGAGE THE OUTER SURFACE OF SAID FLANGE BY BEARING ECCENTRICALLY UPON AND THEREBY SAFELY GRIPPING A WIDE SURFACE AREA OF SAID FLANGE IN THE PIVOTAL MOVEMENT OF SAID LOCKING ARM, AND RESILIENT SPRING MEANS MOUNTED IN SUBSTANTIAL TENSION BETWEEN SAID ARM AND SAID CARRIAGE, BIASING SAID ARM INTO FIRM TEETH ENGAGING, LOCKING GRIP TO THE OUTER SURFACE OF SAID FLANGE, STOP MEANS ON SAID CARRIAGE POSITIONED TO INTERCEPT AN INNER END OF SAID ARM AND STOP ROTARY MOVEMENT OF SAID ARM WHEN MOVING AGAINST SAID SPRING TENSION, SAID ARM HAVING AN OPPOSITE END EXTENDING OUTWARD FROM SAID CARRIAGE AS A LEVER AND FOR ECCENTRIC TOOTH GRIPPING DISENGAGEMENT FROM THE OUTER FLANGE SURFACE UPON OPPOSITE MOVEMENT OF SAID LEVER BY A USER OF SIAD DEVICE.