| abstract |
A housing for a (silicon) micromachined body (for instance an injector valve system, a detector or a stream selector for a gas chromatograph instrument) is field assemblable and disassemblable and mechanically self-aligning so that the micromachined body may be replaced in the field without tools and without adhesives or permanent bonding. The housing includes a top plate and a bottom plate spaced apart by two side rails and accommodating the micromachined body. The various tubes carrying fluids and pneumatic pressure to and from the micromachined body are attached to the housing by adhesives or brazing or by detachable screw-type fittings. The housing is held in alignment by alignment pins passing through it and is clamped together by a spring clamp which also clamps the housing to a printed circuit board and associated planar heater element. In addition to easy field assembly, this assembly allows manufacturing without precision alignment tools, adhesives, or welding. |