Cleaner stand for computer disks

Claim 1

A cleaner stand for a computer pack, which pack comprises a central spindle, an assembly of a plurality of concentric computer disks mounted on said spindle, said assembly having a downwardly opening recess concentric with said spindle, the walls of said recess diverging downwardly in a predetermined pattern, a removable bottom member closing the lower end of said assembly, a securing nut held rotatably centrally of said bottom member and having a securing connection therewith, said nut threaded on the lower end of said spindle and having an outer surface complementary to said walls of said recess, and a cover having a top and depending side walls adapted to completely cover the top and sides of said aSsembly and when positioned in contact with said bottom completely enclosing said assembly, there being retractable radially extendible projections on said spindle which when extended lockingly engage suitable keeper means in said cover, said projections having mountings in said spindle preventing movement of said projections longitudinally of said spindle, there being a small opening through the bottom of said spindle; said cleaner stand comprising a base, a pedestal rigid with said base and vertically extending therefrom, said pedestal having a rigid upper end complementary to the walls of said downwardly opening recess of said assembly, a plunger having a vertical axis concentric with said pedestal upper end and reciprocatably mounted in said pedestal, means for vertically reciprocating said plunger through said upper end, means for holding said last named means in a vertically raised position, a rod mounted for vertical reciprocation axially of said spindle, said rod extending to the bottom of said spindle, means urging said rod downward, a pin on the upper end of said plunger adapted to pass through said opening in the bottom of said spindle and to reciprocate said rod, and a cam on said rod positioned to engage said radially extendible projections in a lower position of said plunger and to hold said projections outward in locking position, said cam so formed that it permits radial retraction of said projections to an unlocking position in an upper position of said plunger, whereby said bottom member may be removed from said assembly by unthreading said securing nut, and said assembly with cover may be placed on said stand with said upper end of said pedestal snugly entered into said assembly recess and with said plunger in its lower position and said plunger may then be raised to cause said rod cam to move to projection unlocking position thus releasing said cover from said assembly.