Office cabinet

A filing cabinet including an interlock mechanism, said cabinet comprising a plurality of horizontally movable drawers, means in said cabinet for supporting said drawers for horizontal movement into and out of said cabinet, a vertical said cabinets at the side of said drawers, a plurality of spring loaded stacked locking bars, one for each drawer, mounted for vertical movement in said track, each locking bar having a shelf projecting laterally from one longitudinal end, means for limiting the vertical movement of said stacked locking bars, an interlock cam pivotally mounted on the other longitudinal end of each locking bar for oscillation through 90.degree., each interlock cam having first and second radially spaced bearing surfaces, each bearing on the shelf of the adjacent locking bar on the first bearing surface of the cam, each cam having a pair of transition surfaces in series between the bearing surfaces, one of the transition surfaces forming a gently inclined ramp and the other being more sharply curved, a pin on each drawer positioned to engage the respective interlock cam and pivot the same through 90.degree. when a drawer is pulled out, the pivoting of the interlock cam causing the two transition surfaces of the cam to roll and slide sequentially across the shelf of the locking bar and causing the second bearing surface to contact the shelf to cause relative movement in the track between the locking bars to close up the limited distance so that none of the locking bars can then move whereby each other interlock cam is prevented from pivoting, locking all other drawers in the closed position.