PBX Field display

A printed circuit board housing comprising a chassis, the chassis having a plurality of successively stepped ledges of increasing height rearwardly of the chassis, a plurality of printed circuit boards each supported by one of said ledges, the chassis having a sloped cover in front of the top edges of said boards in a plane about parallel to a plane meeting the top edges of two of said boards, said cover containing holes positioned in front of said indicator means whereby said indicator means can be visible through said holes from a position in front of said chassis in a plane parallel to the front one of said boards while at the same time remaining components on said boards are substantially masked from view by said cover.

For use in a telephone PABX system, the combination of:

• (a) a first key telephone set located at an operator position,
• (b) a printed circuit board housing including a housing cover having a window, mounted in a location by which the window is visible from said operator position,
• (c) said housing comprising a chassis, means for retaining a plurality of printed circuit boards in substantially parallel relationship on said chassis, the chassis including ledge means for supporting respective ones of said boards in a manner whereby the edges of successive ones of said boards extend past preceding ones of said boards so as to allow electrical visual indicator means mounted adjacent the edges of said boards to be visible from a position forward of the front one of said boards, the window being positioned adjacent said indicator means whereby the indicator means can be viewed by said operator to facilitate control of the PBX.

A combination as defined in claim 10, in which the indicator means is comprised of light emissive indicators, the chassis having a plurality of successively stepped ledges of increasing height toward the rear of the chassis, a plurality of printed circuit boards each supported by one of said ledges, said light emissive indicators mounted adjacent the top edge of predetermined ones of said boards, the chassis having a sloped cover in front of the top edges of said boards in a plane about parallel to a plane touching the top edges of two of said boards, said cover containing holes positioned in front of said light emissive indicators whereby said light emissive indicators can be viewed through said holes from a position in front of said chassis while at the same time remaining components on said boards are substantially masked from view by said cover.

A printed circuit board chassis comprising means for supporting a plurality of printed circuit boards in planes parallel to each other, each of the boards having electrical visual indicator means mounted adjacent an edge thereof, the means for supporting including means for retaining said boards so that said edge of successive rearward ones of said boards extend past said edge of preceding frontward ones of said boards whereby said indicator means mounted on said boards can be visible from a point in front of the front-most board.

A printed circuit board chassis comprising means for supporting a plurality of printed circuit boards, each of the boards having electrical visual indicator means mounted adjacent an edge thereof, the means for supporting comprising means for retaining said boards at successively advanced locations relative to a plane orthogonal to the plane of the boards and parallel to one of said edges whereby said indicator means of all of the boards are visible from a position in front of the chassis which is in a plane parallel to the front-most printed circuit board.