Toward a normative theory for component-based system design and analysis

A "fixed" vacuum capacitor assembly in which first and second sets of interleaved, substantially concentric, capacitor plates are held between opposing end-bell assemblies. A trimmer capacitor including third and fourth sets of capacitor plates, an axial leadscrew assembly and a vacuum sealed axially extendable bellows are emplaced substantially coaxially within the first and second capacitor plate assembly. The third and fourth capacitor plates are variably interleavable in accordance with the leadscrew setting and these third and fourth plate sets together with the leadscrew bellows assembly occupy substantially the same axial dimension, between the end-bell assemblies, as is occupied by the first and second plate sets. A hollow cylindrical ceramic insulating body portion joins the two end-bell parts and the substantially smaller trimmer capacitor and the fixed capacitor formed by the interleaved first and second plate sets are electrically in parallel, the end-bells providing the electrical terminals thereof.