Adjustable legs for ladders

Claim 1

AN ADJUSTABLE LEG DEVICE FOR A LADDER COMPRISING A TUBULAR GUIDE ADAPTED TO BE FIXEDLY SECURED TO THE LOWER END OF A LADDER, GENERALLY PARALLEL LEG PORTIONS ON SAID GUIDE, A TELESCOPIC LEG IN EACH OF SAID LEG PORTIONS, A FOOT ON THE OUTER END OF EACH TELESCOPIC LEG, A RESILIENTLY FLEXIBLE LINE EXTENDED THROUGH SAID GUIDE, MEANS TO CONNECT THE ENDS OF SAID LINE TO THE RESPECTIVE TELESCOPIC LEGS FOR MOVEMENT WITH SAID TELESCOPIC LEGS IN OPPOSITE DIRECTIONS ACCORDING TO THE ADJUSTMENT OF SAID TELESCOPIC LEGS RELATIVELY TO SAID GUIDE, A CURVED PORTION ON SAID GUIDE BEYOND THE LIMIT OF TELESCOPIING OF SAID TELESCOPIC LEGS, A LOCKING KEEPER DEVICE FIXED IN SAID CURVED PORTION, LOCKING ELEMENTS ON SAID LINE ADJACENT SAID LOCKING KEEPER DEVICE NORMALLY HELD BY SAID LINE OUT OF ENGAGEMENT WITH SAID LOCKING KEEPER DEVICE, SAID LINE BULGING IN SAID CURVED PORTION WHEN BOTH TELESCOPIC LEGS ARE PRESSED INWARDLY OF SAID GUIDE SIMULTANEOUSLY THEREBY TO INTERLOCK SAID LOCKING ELEMENTS WITH SAID LOCKING KEEPER DEVICE, AND SPACER MEANS CONNECTED TO SAID LOCKING ELEMENTS TO RESTRAIN THE TELESCOPING OF SAID TELESCOPIC LEGS WHEN SAID LOCKING ELEMENTS ARE IN INTERLOCKING POSITION, SAID LOCKING ELEMENTS BEING STRUNG ON SAID LINE AND HAVING HOLES THERETHROUGH FITTING ON SAID LINE SO THAT THE BULGING OF SAID LINE PUSHES SAID LOCKING ELEMENTS OUTWARDLY AGAINST SAID KEEPER DEVICE AND THE CONTRACTING OF SAID LINE PULLS SAID LOCKING ELEMENTS AWAY FROM SAID KEEPER DEVICE, SPACED PROJECTIONS FORMED BY SAID LOCKING ELEMENTS PROJECTING TOWARD SAID KEEPER DEVICE; SAID KEEPER DEVICE INCLUDING SPACED RECESSES INTERENGAGEABLE WITH SAID SPACED PROJECTIONS; AND SAID LOCKING ELEMENTS BEING ADAPTED TO FOLLOW THE CONTOUR OF SAID GUIDE WHEN MOVED THEREIN.