Safety bindings for releasably locking the heels of ski boots

Claim 1

IN A SKI BINDING A SAFETY FASTENING DEVICE FOR HOLDING THE HEEL END OF A SKI BOOT AGAINST MOTION, WHICH COMPRISES IN COMBINATION TWO RIGID LATERAL ARMS EXTENDING ON EITHER SIDE OF THE SKI-BOOT HEEL LOCATION; SUPPORT MEANS MOUNTED ON THE SKI AND CARRYING HORIZONTAL PIVOT PINS EXTENDING ON EITHER SIDE OF THE BOOT AND HAVING PIVOTED THEREON THE FRONT ENDS OF SAID LATERAL ARMS, A PIVOT PIN DISPOSED BEHIND THE AREA OCCUPIED BY THE BOOT ON THE SKI, PARALLEL TO THE TOP FACE OF THE SKI BUT EXTENDING TRANSVERSELY TO THE SKI AXIS, SAID PIVOT PIN BEING CARRIED BY THE REAR ENDS OF SAID LATERAL ARMS FORMING THEREWITH A BOW SURROUNDING THE BOOT HEEL; A PIVOTING RETAINING MEMBER COMPRISING A BORE IN WHICH SAID HORIZONTAL PIVOT PIN IS ENGAGED TO CONSTITUTE A BEARING THEREFOR; FORWARD OF SAID PIVOTING MEMBER, MEANS FOR GRIPING THE REAR END OF THE BOOT HEEL AND RETAINING SAME ON THE SKI SURFACE WHEN SAID PIVOTING RETAINING MEMBER IS IN ITS NORMAL OPERATIVE POSITION, RESILIENT LOCKING MEANS CONNECTING SAID PIVOTING RETAINING MEMBER AND SAID PIVOT PIN THEREFOR, SAID LOCKING MEANS COMPRISING A SPRING AND AT LEAST ONE LOCKING MEMBER ADAPTED TO KEEP SAID PIVOTING RETAINING MEMBER IN ITS NORMAL OPERATIVE POSITION WITH ITS GRIPPING MEANS BEARING ON THE TOP OF THE REAR PORTION OF THE BOOT HEEL, SAID LOCKING MEANS BEING ON THE OTHER HAND ADAPTED TO PERMIT THE TILTING OF SAID PIVOTING RETAINING MEMBER BACKWARDS TO FREE THE BOOT HEEL WHEN AN ABNORMALLY STRONG UPWARD TRACTIVE EFFORT IS EXERTED THEREON.