Reversing load stop

Claim 1

IN A LOAD STORAGE APPARATUS, A LOAD SUPPORT C OMPRISING A PAIR OF SPACED, CHANNEL SHAPED MEMBERS HAVING THEIR OPEN SIDES FACING EACH OTHER; SAID MEMBERS HAVING UPPER AND LOWER PARALLEL FLANGES; AN EXTRACTOR MOVABLE INTO SAID SUPPORT BETWEEN SAID MEMBERS AND SUPPORTED AT ITS EDGES BY SAID LOWER FLANGES; A VERTICALLY MOVABLE PLATFROM MOUNTED UPON SAID EXTRACTOR AND MOVABLE FROM A LOAD RELEASE POSITION BELOW SAID UPPER FLANGES TO A LOAD SUPPORT POSITION ABOVE SAID UPPER FLANGES; POWER MEANS MOVING SAID EXTRACTOR INTO AND OUT OF SAID SUPPORT TO DEPOSIT OR RETRIEVE A LOAD THEREAT BY BRIDGING SAID LOAD ACROSS SAID MEMBERS; PRESSURE SENSITIVE REVERSING MEANS MOUNTED UPON SAID PLATFORM IN SUCH MANNER AS TO STRIKE A LOAD BRIDGED ACROSS SAID MEMBERS WHEN SAID PLATFORM IS IN THE LOAD SUPPORT POSITION ONLY; SAID POWER MEANS RESPONSIVE TO ACTUATION OF SAID REVERSING MEANS IN SUCH MEANNER AS TO REVERSE THE DIRECTON OF MOVEMENT OF SAID EXTRACTOR; SAID LOAD SUPPORT HAVING STOP MEANS DISPOSED BEYOND A LOAD THEREON IN THE DIRECTION OF MOVEMENT OF SAID EXTRACTOR INTO SAID SUPPORT WHEREBY A LOAD ON SAID SUPPORT WHICH IS TOO LIGHT TO ACTUATE SAID REVERSING MEANS IS RETAINED AGAINST SLIDING TO EFFECT POSITIVE ACTUATION OF SAID REVERSING MEANS.