Retainer bar assembly for mail carrying rack

Claim 1

In a rack assembly which includes a lower frame member; and a pair of spaced and parallel upright posts attached to said lower frame member and defining an open end for the assembly for trays to be inserted through said open end, the combination of: a bracket attached to the upper end of one of the posts having a first generally horizontal planar section with an aperture therein, and having a second generally vertical planar section adjacent to said horizontal section; and a vertical locking bar member having a bent-over U-shaped upper end with its extremity extending downwardly through the aperture in the horizontal section of said bracket and having a generally U-shaped lower end with its extremity extending upwardly through an aperture in the forward end of said frame member aligned with the aperture in the horizontal planar section of said bracket, said locking bar being vertically slidable to a limited extent in the apertures between a lower position and an upper position, said second section of said bracket preventing pivotal movement of said bar when the bar is in said lower position, and said bar being pivotal about the vertical axis of the apertures in said bracket and in said frame member when the bar is in its upper position, the second section of said bracket extending upwardly beyond the first section to form a shoulder for maintaining the bar in its open position, when the bar is moved to is upper position and pivoted about the aforsaid vertical axis over the top edge of said second section and then dropped to its lower position.