Rack slide stop

Claim 1

IN A STRUCTURE PROVIDING A CHAMBER HAVING SIDE WALLS AND A FRONT OPENING, WHEREIN THERE IS AN ARTICLE- SUPPORTING RACK, A RACK SUPPORT SYSTEM COMPRISING; (A) A PAIR OF ELONGATED TRACK MEMBERS OF UNIFORM CROSS-SECTION; (B) SUPPORT MEANS SECURED TO SAID WALLS AND RESPECTIVELY SUPPORTING SAID TRACK MEMBERS FOR HORIZONTAL MOVEMENT ALONG THEIR AXES BETWEEN POSITION ENTIRELY WITHIN SAID CHAMBER TO POSITION PARTLY OUTSIDE SAID CHAMBER; (C) MEANS SECURING SAID RACK TO SAID TRACK MEMBERS FOR HORIZONTAL MOVEMENT THEREWITH; (D) AT LEAST ONE OF SAID TRACK MEMBERS INCLUDING STOP MEANS OPERATIVELY ASSOCIATED WITH THE INNER END THEREOF; (E) SAID STOP MEANS BEING MOVABLE TO A FIRST OPERATIVE POSITION WHEREIN SAID STOP MEANS ENGAGE SAID SUPPORT MEANS UPON SAID TRACK MEMBERS BEING MOVED A PREDETERMINED DISTANCE OUT SAID CHAMBER, THEREBY STOPPING FURTHER OUTWARD MOTION OF SAID TRACK MEMBERS; (F) SAID STOP MEANS BEING MOVABLE TO A SECOND INOPERATIVE POSITION WHICH PERMITS SAID TRACK MEMBERS AND SAID RACK TO BE MOVED HORIZONTALLY UNTIL THEY ARE REMOVED ENTIRELY FROM WITHIN SAID CHAMBER; (G) CONNECTING MEANS WITHIN SAID ONE OF SAID TRACK MEMBERS EXTENDING FORWARDLY FROM SAID STOP MEANS TO THE OUTER END OF SAID TRACK MEMBER TO A POINT NEAR THE FRONT OPENING OF SAID CHAMBER; AND (H) SAID CONNECTING MEANS INCLUDING A MANUALLY OPERABLE CONTROL MEMBER AT THE FRONT END THEREOF, WHEREBY ADJUSTMENT OF SAID STOP MEANS BETWEEN ITS OPERATIVE AND INOPERATIVE POSITIONS CAN BE EFFECTED FROM THE FRONT OF SAID RACK.