Abstract: There is described a motion control device for preventing free-fall of electronics modules during vertical movement into or out of a supporting structure. The system comprises a rotatable element on the module or structure engageable with surface on the structure or module, respectively, for rolling movement therealong. The rotatable element is provided with a clutch or brake to provide resistance to rotation at least when the module is moving downward relative to the structure. The rotatable element may be a gear engageable with a toothed rack, or a friction roller engageable with a friction surface.

Abstract: A method of joining a plurality of sheets by means of a blind rivet, comprises: (i) forming holes in the sheets and placing the sheets together so that the holes are in register and form a single hole therethrough; (ii) inserting a blind rivet into the hole formed in the sheets from a working side thereof, the blind rivet comprising a sleeve (1) positioned about a mandrel that has a head (4); and (iii) setting the rivet. The hole (24) is radially enlarged at the outwardly facing surface of at least the sheet on the blind side, and the sleeve of the rivet is deformed during setting to form a rivet joint in which no part of the rivet is proud of the outwardly facing surface (28) of the sheet at least on the blind side of the sheets. The method enables rivet joints to be formed in sheets, for example used in enclosures that house modules, where there is no space available for the set rivets to protrude.

Abstract: An electronics assembly comprises:

Abstract: A method of joining a plurality of sheets by means of a blind rivet, comprises: (i) forming holes in the sheets and placing the sheets together so that the holes are in register and form a single hole therethrough; (ii) inserting a blind rivet into the hole formed in the sheets from a working side thereof, the blind rivet comprising a sleeve (1) positioned about a mandrel that has a head (4); and (iii) setting the rivet. The hole (24) is radially enlarged at the outwardly facing surface of at least the sheet on the blind side, and the sleeve of the rivet is deformed during setting to form a rivet joint in which no part of the rivet is proud of the outwardly facing surface (28) of the sheet at least on the blind side of the sheets. The method enables rivet joints to be formed in sheets, for example used in enclosures that house modules, where there is no space available for the set rivets to protrude.

Abstract: A method of joining a plurality of sheets by means of a blind rivet, comprises:

Abstract: An electronics assembly comprises: (i) a frame (1); and (ii) a motherboard (16) that is removable from the frame. One or more motherboards (20) extend in a plane generally perpendicular to the plane of the motherboard; and a number of elongate guides (24) are provided for the daughterboards to enable each daughterboard to be moved toward the motherboard into engagement therewith and away from the motherboard out of engagement therefrom. The motherboard (16) has at least one location element (32) thereon, which can engage one of the elongate guides (24) in order to locate the guides and the motherboard with respect to one another. This assembly enables accurate positioning of the daughterboards and the motherboard for forming electrical connections between them even where large tolerances are present in other parts of the assembly.

Abstract: An electronics assembly comprises: (i) a frame (1); (ii) a motherboard (16) that is located within the frame; and (iii) one or more daughterboards (20) that extend in a plane generally perpendicular to the plane of the motherboard. The motherboard has a protective shield (40, 52) that extends over the major surface of the motherboard that is oriented toward the or each daughterboard. The shield has one or more apertures (54) therein to allow electrical connection between the motherboard and the or each daughterboard.

Abstract: There is described a motion control device for preventing free-fall of electronics modules during vertical movement into or out of a supporting structure. The system comprises a rotatable element on the module or structure engageable with surface on the structure or module, respectively, for rolling movement therealong. The rotatable element is provided with a clutch or brake to provide resistance to rotation at least when the module is moving downward relative to the structure. The rotatable element may be a gear engageable with a toothed rack, or a friction roller engageable with a friction surface.