Sealed electrical device with unitary fill port and terminal construction

A method for filling and sealing an electrical device constructed of a metal container originally having an open end and a substantially closed end, an internal electrical assembly having first and second electrical connectors, a metal cover with a periphery therearound closing the open end, an annular insulating, sealing gasket with an opening therein, and a metal feedthrough passing through the opening in the gasket, said method comprising in sequence order:

• providing an internal electrical assembly having first and second electrical connectors and a metal container originally having an open end and a substantially closed end;
• connecting a metal feedthrough through said second electrical connector;
• installing said internal electrical assembly with the connected metal feedthrough into said metal container;
• connecting the first electrical connector to the container;
• sealing the periphery of the metal cover to the open end of the container;
• filling the device with a liquid through a fill port having an outwardly disposed annular section defined by a face of the container opposite to the open end, or by the cover at a distance from the seal of the periphery of the cover;
• positioning an annular insulating, sealing gasket in the annular section and peripheral to the feedthrough so that the feedthrough passes through the opening in the gasket;
• and
• crimp sealing the annular section to seal an inner surface of the annular section to an outer surface of the gasket and an inner surface of the gasket to an outer surface of the feedthrough.