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Claim 1

IN A DEMOUNTABLE SECTIONAL FRAME STRUCTURE FOR STORE COUNTERS, MERCHANDISE DISPLAY GONDOLAS AND THE LIKE, THE COMBINATION OF: A FRAME CORNER INCLUDING A VERTICAL, SHEET-METAL, TUBULAR POST, AND A HORIZONTAL SHEET METAL CHANNEL MEMBER HAVING A HORIZONTAL UPWARDLY DISPOSED MAIN WALL AND DOWNWARDLY EXTENDING SIDE WALLS WHICH TERMINATE AT THEIR LOWER EDGES WITH INTURNED, COPLANAR HORIZONTAL FLANGES INNER EDGES OF WHICH ARE SPACED TO FORM A LONGITUDINAL DOWNWARDLY DISPOSED CENTRAL OPENING IN SAID CHANNEL MEMBER, AN ENDWISE-OPEN END PORTION OF SAID CHANNEL MEMBER RESTING ON AND BEING WELDED TO THE TOP END OF SAID POST TO FORM A RIGHT ANGLE WITH SAID POST; A SECOND AND SEPARATE SHEET METAL CHANNEL MEMBER, LIKE THE FIRST SUCH MEMBER ABOVE RECITED, AND HAVING AN OPEN END; AN INVERTED CHANNEL SHAPED SHEET METAL TONGUE MEMBER FITTING CLOSELY WITHIN AND WELDED IN PLACE IN SAID OPEN END OF SAID SECOND CHANNEL MEMBER AND EXTENDING A SUBSTANTIAL DISTANCE OUTWARDLY BEYOND SAID OPEN END TO FORM A TONGUE, SAID TONGUE MEMBER INCLUDING A HORIZONTAL DOWNWARDLY DISPOSED SOLID WALL AND SIDE WALLS EXTENDING UPWARDLY THEREFROM THERE BEING A LONGITUDINAL SLOT CENTRALLY LOCATED IN SAID WALL OF SAID TONGUE SAID SLOT EXTENDING CLOSE TO SAID OPEN END OF SAID SECOND CHANNEL MEMBER, SAID TONGUE BEING RECEIVED WITH A CLOSE SLIDING FIT WITHIN THE OPEN END PORTION OF SAID FIRST CHANNEL MEMBER TO RELATIVELY RIGIDLY ORIENT SAID FIRST AND SECOND CHANNEL MEMBERS IN ALIGNMENT AND WITH THEIR ENDS IN ABUTMENT; AND LEAF SPRING MEANS SECURED TO SAID SOLID HORIZONTAL WALL OF SAID TONGUE MEMBER A SUBSTANTIAL DISTANCE WITHIN SAID OPEN END OF SAID SECOND CHANNEL MEMBER SAID SPRING MEANS BEING NARROWER THAN SAID SLOT AND BEING FORMED DOWNWARDLY THROUGH SAID SLOT TO PROVIDE A SNAP LATCH MEANS ENGAGING WITHIN THE UPPER END OF SAID POST TO PREVENT ACCIDENTAL WITHDRAWAL OF SAID TONGUE FROM SAID FIRST CHANNEL MEMBER, SAID SPRING MEANS BEING FORMED OBLIQUELY UPWARDLY AND FORWARDLY FROM SAID SNAP LATCH MEANS TO EXTEND UPWARDLY THROUGH SAID SLOT AND FORM A CAM MEANS ENGAGING THE UPPER END OF SAID POST WHEN SAID TONGUE IS INSERTED IN SAID FIRST CHANNEL MEMBER AND THUS CAMMING SAID SNAP LATCH MEANS UPWARDLY DURING SAID INSERTION OF SAID TONGUE.