Collapsible book rack

Claim 1

A STRUCTURE OF THE CLASS DESCRIBED COMPRISING, IN COMBINATION, SUPPORT MEANS EMBODYING A FIRST ELONGATED ROD MEMBER, A SECOND ELONGATED ROD MEMBER SPACED FROM AND PARALLEL TO SAID FIRST ROD MEMBER AND COMMENSURATE IN LENGTH THEREWITH, AND AN ADJUSTABLY SHIFTABLE SLIDE AT RIGHT ANGLES TO SAID ROD MEMBERS SPANNING THE SPACE BETWEEN SAID ROD MEMBERS, AND HAVING TERMINAL END PORTIONS WHICH ARE SLIDINGLY KEYED ON AND THUS LINKED TO THEIR RESPECTIVE ROD MEMBERS, ONE OF SAID ROD MEMBERS BEING ROTATABLY MOUNTED ON SAID SUPPORT MEANS AND TURNABLE IN AND RELATIVE TO THE END OF SAID SLIDE WHICH IS SHIFTABLE ON SAID ONE ROD MEMBER, THE LATTER ROD MEMBER BEING PROVIDED ON ONE LENGTHWISE PERIPHERAL SURFACE WITH LONGITUDINALLY SPACED SELECTIVELY USABLE KEEPER SEATS, AND SAID ONE END OF SAID SLIDE HAVING A RESILIENT KEEPER WHICH IS ADAPTED TO SNAP INTO A SELECTED KEEPER SEAT WHEREBY TO THUS LOCK SAID SLIDE IN A GIVEN POSITION ON SAID ROD MEMBERS, SAID ROD MEMBERS COMPRISING DOWELS WHICH ARE CIRCULAR IN CROSS-SECTION, THE COACTING ENDS OF SAID SLIDES BEING APERTURED AND SAID ROD MEMBERS, PASSING THROUGH THE RESPECTIVE APERTURED ENDS, SAID KEEPER COMPRISING A FLAT-FACED TONGUE FIXED AT ONE END, THE OTHER END BEING FLEXIBLE FREE AND DEFINING THE KEEPER PROPER, SAID KEEPER SEATS COMPRISING RECESSES FORMED IN SAID ONE PERIPHERAL SURFACE AND INTO WHICH SAID KEEPER AUTOMATICALLY SNAPS AND RETENTIVELY SEATS ITSELF, ONE FLAT SIDE OF SAID TONGUE BEING ADAPTED TO RIDE UNINTERRUPTEDLY ALONG THE SMOOTH SIDE OF SAID PERIPHERAL SURFACE WHEN THE KEEPER SEATS ARE TURNED FROM AND DISALIGNED WITH THE PATH OF TRAVEL OF SAID TONGUE, AND MANUALLY ACTUATABLE TRIP MEANS CARRIED BY AND OPERATIVELY MOUNTED ON SAID ONE END OF SAID SLIDE AND RELEASABLY ENGAGEABLE WITH SAID KEEPER AND FUNCTIONING TO FORCE THE LATTER OUT OF THE KEEPER SEAT IN WHICH IT IS TEMPORARILY SEATED TO EFFECT THE RELEASE STEP DESIRED.