Collapsible supporting stand

Claim 1

A support stand comprising a base housing having three leg receiving extensions spaced equidistant thereabout, a leg pivotally mounted in each of said extensions, a first hollow shaft secured to the upper side of said housing and extending vertically upward therefrom, said legs having a first open position wherein the legs are extended outwardly to support said first shaft upright and a second position in which said legs are pivotally rotated relative to said housing to substantially lay adjacent said first shaft, a second shaft slidably movable within said first shaft and adapted to extend vertically therefrom, a support arm pivotally mounted at the upper end of said second shaft, said support arm extending outwardly from said second shaft in a plane vertically above one leg, a locking plate rotatably mounted to said housing on the side opposite said first shaft for locking said legs in said first and second positions, said plate being formed wth circumferentially spaced grooves corresponding to the circumferential spacing of said legs, said plate being rotatable to a first position in which the plate area between the grooves engages each of said legs wherein said legs are prevented from pivotal movement, said plate having a second position in which said grooves are aligned with said legs wherein said legs may be pivotally moved relative to said housing, tab means on said plate for abuttingly engaging said housing in each of said positions, and means for adjustably tightening said plate relative to said housing.