the mechanism 104 may secure the tabletop 112 at an approximately forty five degree angle relative a plane parallel to the floor as is commonly done with drafting tables and the like for simplicity the mechanism 104 is described herein as securing a tabletop 112 in a horizontal and a vertical position although it is understood that the mechanism 104 may secure the tabletop 112 in two positions of an angular orientation it is noted that the tabletop mechanism 104 is shown secured to the bottom surface of the tabletop 112 in fig1 3 the bracket 116 may be connected to the tabletop 112 as shown in fig1 3 however in other embodiments the bracket 116 may be connected to the support frame 108 the bracket 116 includes a pair of flanges 124 and a base region 128 as shown in fig4 and 5 the flanges 124 may extend from the base region 128 at an angle approximately perpendicular to the base region 128 at least a portion of the first and second lock elements are coupled to the bracket 116 a top view of the bracket 116 is shown in fig7 the first lock element referred to as the hook lock 132 is shown in the disengaged position in fig1 and in the engaged position in fig2 and 6 as illustrated the hook lock 132 secures the tabletop 112 in the horizontal position however in other embodiments the hook lock 132 may secure the tabletop 112 in the vertical position the hook lock 132 includes a pair of pivot members 136 a first member referred to as a shaft 140 and two biasing springs 144 the pivot members 136 are pivotally coupled to an inside surface of a respective flange 124 through opening.