Cabinet drawer interlock

In a device for interlocking drawers in vertically tiered filing cabinets having a pivoting vertical locking member mounted within the cabinet and an L-shaped bracket mounted to each drawer for engaging the locking member, the improvement comprising:

• a locking member being dimensionally and geometrically compatible with interior corners of the cabinet, the member being mounted in juxtaposition substantially within a selected interior corner of the cabinet, said member being parallely juxtaposed to the cabinet side wall defining the selected interior corner, said member having two elongated perpendicular legs secured to a columnar hinge shaft at the apex of the right angle defined by said legs, the shaft defining a vertical axis around which the legs arcuately swing within the selected interior corner;
• and
• at least two abutment blocks mounted to said cabinet side wall, the blocks being positioned on the cabinet side wall so that each leg abuts against one of the blocks to limit arcuate swing of the legs to 90.degree., whereby said member is in a locked position when the right angle defined by the legs is geometrically coinciding with the right angle defined by the selected cabinet interior and said member is in an unlocked position when the right angle defined by the legs is geometrically non-coinciding with the right angle defined by the selected cabinet interior corner.