Case for electrical components

Claim 1

A case for electrical components, said case being adapted to be releasably attached to a mounting standard having a pair of spaced apart edges and being of a predetermined thickness, said case comprising: a floor; a wall extending upward from said floor; a spaced apart pair of flexible arms integral with and extending outward in spaced apart parallel planes from said wall, the free ends of said arms including curved, inwardly facing projections defining angled surfaces, which force said arms to flex outwardly when pressed against the edges of the support so that the free ends of said arms can pass over the edges of the support, and inner edges which engage and capture the mounting support between said arms; and a pair of spacer ribs positioned between said arms and extending outward from said wall in spaced apart parallel planes so as to provide a free space between them for receiving therein fastening means, the length of said pair of spacer ribs being proportioned so that the distance between the terminal ends thereof and said inner edges of said arms is only slightly greater than the thickness of the mounting support to thereby form a reasonably tight fit between said case and the mounting support, said case being attached to said mounting standard by pressing the angled surfaces on said free ends of said arms against said spaced apart edges of the mounting standard to thereby cause said arms to flex outward to pass said projections over said edges and behind the mounting standard to capture the mounting standard between the terminal ends of said spacer ribs and said inner edges of said projections, the free space between said spacer ribs permitting said case to be attached to the mounting standard directly opposite fastening means with said spacer means straddling the fastening means.