effect a slow upward movement of the related legs and tabletop the locking means 27 fig3 includes a manually slidable flat pull panel 29 which is mounted by means of washer headed screws 31 for sliding movement relative to the underside of the tabletop 2 the shanks of the screws extend freely through longitudinally extending slots 32 in the pull panel and are entered into the underface of the tabletop fixed to and extending across the mid area of the underface of the pull panel is a strip 33 downwardly inclined ends 34 of which project beyond the sides of the pull panel and are connected by a pair of springs 35 to screws 36 entered into the underface of the tabletop the pull panel is biased by the springs rearwardly of the tabletop to a normal position in which forward ends of the slots 32 limit against the screws 31 as appears in fig3 fixed to and extending across a forward underface of the pull panel is an elongated flat strip 37 fig3 which is connected at one end by means of a slot 38 and a pin 39 to a link 41 an opposite end of the link is fixed to the top of a leg locking shaft 42 the shaft depends.