Computer mainframe housing assembled with hooks and notches

Claim 1

A computer mainframe housing, comprising an under body, a cross bar fastened inside said under body for hanging a holder for 31/2" diskdrive, a top cover covering said under body, and a front panel covering said under body at a front side thereof; said under body further comprising a front side wall and a rear side wall vertically disposed at two opposite sides thereof, two vertical, symmetrical end stops vertically disposed at two opposite ends thereof, a frame for 51/4" diskdrive secured behind a slot on front side wall, and a shackle secured to said rear side wall at an outer side by spring means for securing said under body to a support, said end stops each having a plurality of notches, said front side wall having at least one retaining hole and a key hole and an inward top flange, said rear side wall having an inward peripheral flange, and a bolt hole on an interface card holder thereof, said inward peripheral flange having an opening above the bolt hole on said interface card holder, said frame for 51/4" diskdrive having a plurality of spaced hooks on a top edge thereof; said cross bar having a bolt hole at one end thereof inserted in the opening on the inward peripheral flange of said rear side wall of said under body and secured to the bolt hole on said interface card holder by a screw, at least one hook at an opposite end thereof respectively hooked in the at least one retaining hole on said front side wall of said under body, and a plurality of hooks on a top edge thereof respectively; said holder for 31/2" diskdrive hung between said cross bar and said frame for 51/4" diskdrive, having two row of holes at two opposite ends respectively hung on the hooks on said cross bar and the hooks on said frame for 51/4" diskdrive; said front panel fixedly secured to said top cover, said front panel having a lock controlled by a key to lock a cam in said key hole on said front side wall of said under body; and said top cover further comprising a plurality of hooks respectively hooked in the peripheral flange of said rear side wall and the notches on said two end stops of said under body.