Quasi-TEM analysis of slow-wave mode propagation on coplanar microstructure MIS transmission lines

A snap disc operated thermostat in which the switch body and disc case are free of surfaces which would limit the final assembled position. Variations in the sizes of the component parts are compensated for by partially assembling the device until the switch first closes. This provides a reference point which compensates for component part size variations. The body and case are then moved to a final position of assembly through a predetermined distance arranged to insure proper snap operation of the switch in both opening and closing. Such predetermined distance is selected to compensate for existing ambient temperature during assembly and for the amount of creep between one position of stability and the adjacent position of instability.