Chassis intended to hold electronic circuits

A rack for mounting circuit boards comprising:

• a pair of vertically spaced side walls, a first pair of vertically spaced cross-pieces attached to the respective side walls, a second pair of vertically spaced cross-pieces attached to the respective side walls and extending parallel to said first pair of cross-pieces, said first and second pairs of cross-pieces each having regularly spaced and inwardly facing grooves, said second pair of cross-pieces having inwardly facing extensions, a connector provided with first and second end projecting tongues, each of said projecting tongues being provided with an aperture, a plurality of pairs of support members each extending between the first and second pairs of cross-pieces, said support members being provided with opposed elongated grooves for the reception of circuit card edges and having projecting studs which removably engage the said apertures and shoulders which press the said projecting tongues against the said inwardly facing extensions, said support members further having vertically extending ribs which slidably and horizontally engage the grooves of the cross-pieces of the second pair and resilient jaws which grasp and hold the cross-pieces of the second pair, said support members further having further ribs which slidably and vertically engage the grooves of the cross-pieces of the first pair and further resilient jaws which grasp and hold the cross-pieces of the first pair.