Keyboard support assembly

An articulated support assembly adapted for adjustably supporting a computer keyboard along one edge of a horizontal support member having a bottom surface, said support assembly comprising

• two attachment members adapted to be attached to the bottom surface of the horizontal support member in spaced relationship adjacent said edge;
• a platform having an upper surface adapted to have a computer keyboard supported thereon;
• a generally U shaped rigid support member having an elongate central portion having a central portion axis and having opposite axially spaced ends and generally parallel end portions projecting in the same direction from the opposite ends of said central portion;
• platform mounting means mounting said platform on said central portion for pivotal movement of said platform about said central portion axis with said upper surface generally parallel to said central portion axis;
• first releasable retaining means between said platform and said central portion moveable between a retaining position for restricting pivotal movement of said platform about said central portion axis, and a release position affording relatively free pivotal movement of said platform about said central portion axis;
• support member mounting means adapted for mounting said end portions of said support member on said attachment members for pivotal movement about a pivot axis parallel to said central portion axis to afford revolving said central portion about said pivot axis;
• and
• second releasable retaining means between said end portions and said attachment members moveable between an engaged position for preventing revolving movement of said central portion toward a lowered position relative to said attachment members, and a disengaged position for affording revolving movement of said central portion toward either a lowered or a raised position relative to said attachment members.