GB1125201A - Improvements in frames for accommodating circuit cards or module frames - Google Patents

Abstract

1,125,201. Mounting electrical equipment. VERO ELECTRONICS Ltd. 1 May, 1967 [18 Feb., 1966; 28 Dec., 1966], Nos. 7299/66 and 57962/66. Heading H1R. In a rack for holding circuit boards or drawer type modules the edge connectors have ears projecting from their ends and are retained in the rack, as a group and without individual attachment to the rack, by a pair of parallel retaining strips which extend at right angles to the edge connectors in abutment with the ears. In the embodiment of Fig. 3, printed circuit boards, Fig. 2 (not shown), are slid endwise into a pair of opposed guides 15 of the rack so that each circuit board makes electrical contact with an edge connector 19, Fig. 4 (not shown), pins 23 on the edge connectors 19 having electrical connections made thereto. Each edge connector is formed at its ends with ears 24 which are fitted into stepped recesses 26 provided in guide assemblies 14. They are retained in position by a pair of retaining strips 27 which are screwed into tapped holes 29, 31 in assemblies 14. In the rack of Fig. 5 and Fig. 6 (not shown), individual guides 15 are mounted on tie rods 32 and the end-plates 12 are joined at each corner by module guide rail assemblies 33 each including a pair of rails 34, 35. The ears of the edge connectors 19 stand proud of the guides 15 which are provided with shallow recesses 39 which receive the shoulders 21 only of the edge connectors. The rails 34 of the lower guide rail assemblies constitute retaining strips for the edge connectors. The rack may be slid as a drawer into a larger cabinet. In the case of the rack shown in Fig. 9 and Figs. 7, 8, 10 (not shown) the end-plates 12 are joined by two pairs of aluminium extrusions 40, 41 for retaining the guide assemblies 14 provided with grooves 15 for the circuit boards 16. The assemblies 14 have at one end projections 44 defining between them recesses for the reception of the ears 24 of the edge connectors 19 which are retained in position by retaining strips 27. In a further arrangement, Fig. 11 (not shown), and Fig. 12, the end-plates are joined by an additional pair of aluminium extrusions 48, comb members 52 being fitted into T-slots 49 between bolts 51 and projections 53 on the comb members extending between the ears 24 to position the edge connectors 19 in the rack. The ears 24 are accommodated between the extrusions 48 and retaining strips 27 held in position by nuts 54 on bolts 51.