Angularly adjustable shelf bracket

Claim 1

A SHELF SUPPORT COMPRISING AN UPRIGHT MEMBER HAVING A WEB OF PREDETERMINED THICKNESS AND PROVIDED WITH AT LEAST 3 VERTICALLY SPACED APERTURES THEREIN, AND A BRACKET SELECTIVELY AND ADJUSTABLY ENGAGEABLE WITH SAID APERTURES, SAID BRACKET COMPRISING A BRACKET BODY HAVING A REAR END EDGE PROVIDING A FIRST SUBSTANTIALLY FLAT BEARING SURFACE AND A SECOND SUBSTANTIALLY FLAT BEARING SURFACE EXTENDING FORWARDLY AT AN ANGLE RELATIVE TO SAID FIRST SURFACE AND OFFSET FORWARDLY THEREFROM, A THIRD SURFACE CONNECTING THE FIRST AND SECOND SURFACES AND SUBSTANTIALLY PERPENDICULAR TO THE SECOND SURFACE, FIRST AND SECOND TONGUES AND A TANG PROJECTING REARWARDLY FROM THE REAR END OF SAID BODY ARRANGED TO BE SIMULTANEOUSLY ENGAGEABLE IN THREE OF SAID APERTURES, SAID TANK BEING LOATED IN SPACED RELATION TO THE JUNCTURE OF THE FIRST AND THIRD SURFACES AND SAID SECOND TONGUE BEING LOCATED BETWEEN SAID FIRST TONGUE AND THE TANG, A FIRST NOTCH IN EACH TONGUE OPENING IN THE DIRECTION OF THE TANG AND OF A WIDTH TO ENGAGE OVER THE LOWER EDGE OF EACH OF TWO OF THE APERTURES, THE REAR EDGES OF SAID FIRST NOTCHES EACH HAVING AT LEAST A PORTION THEREOF SPACED FROM THE PLANE OF SAID FIRST SURFACE BY A DISTANCE SUBSTANTIALLY EQUAL TO THE THICKNESS OF THE WEB MATERIAL, A SECOND NOTCH IN THE FIRST TONGUE REARWARDLY OF AND OPENING IN THE SAME GENERAL DIRECTION AS THE FIRST NOTCH THEREIN AND OF A WIDTH AT LEAST EQUAL TO SAID MATERIAL THICKNESS, THE REAR EDGE OF SAID SECOND NOTCH HAVING AT LEAST A PORTION THEREOF LYING IN A PLANE EXTENDING AT AN ANGLE TO SAID FIRST SURFACE AND PASSING REARWARDLY OF SAID JUNCTURE BY SAID MATERIAL THICKNESS DISTANCE, AND A THIRD NOTCH IN THE FIRST TONGUE REARWARDLY OF THE SECOND NOTCH OPENING IN THE DIRECTION AWAY FROM THE TANG AND SECOND TONGUE AND OF A WIDTH AT LEAST EQUAL TO THE WEB MATERIAL THICKNESS, THE REAR EDGE OF SAID THIRD NOTCH HAVING AT LEAST A PORTION THEREOF SPACED FROM THE PLANE OF SAID SECOND SURFACE BY SAID MATERIAL THICKNESS DISTANCE, SAID THIRD SURFACE BEING SPACED FROM THE BOTTOM OF THE THIRD NOTCH BY A DISTANCE SLIGHTLY LESS THAN THE SPACING BETWEEN THE LOWER EDGE OF THE TANG-RECEIVING APERTURE AND THE UPPER EDGE OF THE FIRST TONGUE-RECEIVING APERTURE BUT SUFFICIENTLY GREAT TO DISPOSE SAID THIRD NOTCH REAR EDGE PROJECTING ABOVE THE LEVEL OF SAID UPPER APERTURE EDGE REARWARDLY THEREOF UPON ENGAGEMENT OF THE THIRD SURFACE ON SAID LOWER APERTURE EDGE, AND SAID SECOND SURFACE BEING ENGAGEABLE IN BEARING RELATION ON THE WEB UPON SAID ENGAGEMENT OF THE THIRD SURFACE ON SAID LOWER APERTURE EDGE AND SAID DISPOSITION OF THE THIRD NOTCH REAR EDGE.